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Agus Purwanto
Chemical Engineering Department, Engineering Faculty, Universitas Sebelas Maret , Jl. Ir Sutami 36A , Surakarta 57126 , Indonesia

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Conference paper
Published: 01 March 2021 in IOP Conference Series: Materials Science and Engineering
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Spent nickel catalyst is the catalyst residue that has lost its catalytic function. Spent nickel catalyst contains Ni metal which is already high and environmentally hazardous. This problem can be solved by recovering the spent nickel catalyst as an anode and combined with lithium nickel cobalt oxide (NCA) as a cathode for lithium ion batteries. A study about it has never been conducted. The method used to treat the spent catalyst was acid leaching using 1 M citric acid and 4 M hydrochloric acid at 70-80°C for 2 hours, then continued with precipitation and thermal decomposition. Another method employed was direct sintering at 800°C for 12 hours. Material characterisation was carried out by X-Ray Diffraction (XRD), Atomic Absorption Spectrophotometry (AAS), Fourier Transform Infra-Red (FTIR), and X-Ray Fluorescence (XRF), while electrochemical performance was carried out by NEWARE Battery Analyzer and BTS software. The results of this study indicate that Ni can be recovered with hydrochloric acid as much as 15.387 gr higher than citric acid as much as 11.831 gr from 20 gr sample. The XRD pattern also indicates the presence of crystals NiO I and NiO II in the leached and sintered material. The results of acid leaching in the form of NiO I was perfectly formed, but NiO still has a little impurity. Electrochemical performance was tested with a cylindrical battery resulting in a discharge capacity of 37.210 mAh g−1.

ACS Style

S S Nisa; A R Nurohmah; C S Yudha; M Rahmawati; T Paramitha; H Widiyandari; E R Dyartanti; A Purwanto. Preliminary Investigation of NiO Anode for NCA/NiO Battery from Spent Catalyst Recovery. IOP Conference Series: Materials Science and Engineering 2021, 1096, 012140 .

AMA Style

S S Nisa, A R Nurohmah, C S Yudha, M Rahmawati, T Paramitha, H Widiyandari, E R Dyartanti, A Purwanto. Preliminary Investigation of NiO Anode for NCA/NiO Battery from Spent Catalyst Recovery. IOP Conference Series: Materials Science and Engineering. 2021; 1096 (1):012140.

Chicago/Turabian Style

S S Nisa; A R Nurohmah; C S Yudha; M Rahmawati; T Paramitha; H Widiyandari; E R Dyartanti; A Purwanto. 2021. "Preliminary Investigation of NiO Anode for NCA/NiO Battery from Spent Catalyst Recovery." IOP Conference Series: Materials Science and Engineering 1096, no. 1: 012140.

Article
Published: 01 January 2021 in Open Engineering
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LiFePO4/C cathode material is largely used in Li-ion batteries due to its low toxicity, nonhazardous and high stability features. A facile and simple approach is proposed in LiFePO4/C production using low-cost materials. The effect of carbon addition during the formation of LiFePO4/C was investigated. Based on the XRD and FTIR analyses, olivine-structured LiFePO4/C cathode material was successfully obtained via methanol-based rheological method. The SEM result showed that the material has micron-sized polyhedral shape. The electrochemical performance tests were conducted in an 18,650-type cylindrical battery. The charge–discharge performances were tested at a voltage range of 2.2–3.65 V using charge and discharge rate of 1C. Based on the charge–discharge test, LiFePO4 with 30% carbon addition has the highest specific capacity of 121 mA h/g with excellent cycle and rate performance as a result of successful carbon compositing in LiFePO4 material. This approach is promising to be adapted for mass production of LiFePO4/C.

ACS Style

Meidiana Arinawati; Anjas P. Hutama; Cornelius S. Yudha; Mintarsih Rahmawati; Agus Purwanto. Facile rheological route method for LiFePO4/C cathode material production. Open Engineering 2021, 11, 669 -676.

AMA Style

Meidiana Arinawati, Anjas P. Hutama, Cornelius S. Yudha, Mintarsih Rahmawati, Agus Purwanto. Facile rheological route method for LiFePO4/C cathode material production. Open Engineering. 2021; 11 (1):669-676.

Chicago/Turabian Style

Meidiana Arinawati; Anjas P. Hutama; Cornelius S. Yudha; Mintarsih Rahmawati; Agus Purwanto. 2021. "Facile rheological route method for LiFePO4/C cathode material production." Open Engineering 11, no. 1: 669-676.

Journal article
Published: 26 November 2020 in Applied Sciences
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Abundantly available SiO2 (silica) has great potential as an anode material for lithium-ion batteries because it is inexpensive and flexible. However, silicon oxide-based anode material preparation usually requires many complex steps. In this article, we report a facile method for preparing a SiO2/C composite derived from coal combustion fly ash as an anode material for Li-ion batteries. SiO2 was obtained by caustic extraction and HCl precipitation. Then, the SiO2/C composite was successfully obtained by mechanical milling followed by heat treatment. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Electrochemical properties were tested using an 18650 cylindrical cell utilizing LiNi0.8Co0.15Al0.05O2 (NCA) as the counter electrode. Based on the obtained results, the physiochemical characteristics and electrochemical performance, it was determined that SiO2/C composites were greatly affected by the temperature of heat treatment. The best result was obtained with the SiO2 content of 10% w/w, heating temperature of 500 °C, initial specific discharge capacity of 586 mAh g−1 at 0.1 C (1 C = 378 mAh g−1), and reversible capacity of 87% after 20 cycles. These results confirmed that the obtained materials had good initial discharge capacity, cyclability, high performance, and exhibited great potential as an anode material for LIBs.

ACS Style

Arif Jumari; Cornelius Satria Yudha; Hendri Widiyandari; Annisa Puji Lestari; Rina Amelia Rosada; Sigit Puji Santosa; Agus Purwanto. SiO2/C Composite as a High Capacity Anode Material of LiNi0.8Co0.15Al0.05O2 Battery Derived from Coal Combustion Fly Ash. Applied Sciences 2020, 10, 8428 .

AMA Style

Arif Jumari, Cornelius Satria Yudha, Hendri Widiyandari, Annisa Puji Lestari, Rina Amelia Rosada, Sigit Puji Santosa, Agus Purwanto. SiO2/C Composite as a High Capacity Anode Material of LiNi0.8Co0.15Al0.05O2 Battery Derived from Coal Combustion Fly Ash. Applied Sciences. 2020; 10 (23):8428.

Chicago/Turabian Style

Arif Jumari; Cornelius Satria Yudha; Hendri Widiyandari; Annisa Puji Lestari; Rina Amelia Rosada; Sigit Puji Santosa; Agus Purwanto. 2020. "SiO2/C Composite as a High Capacity Anode Material of LiNi0.8Co0.15Al0.05O2 Battery Derived from Coal Combustion Fly Ash." Applied Sciences 10, no. 23: 8428.

Journal article
Published: 13 October 2020 in Applied Sciences
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Highly crystalline “zero-strain” Li4Ti5O12 (LTO) has great potential as an alternative material for the anodes in a lithium ion battery. In this research, highly crystalline LTO with impressive electrochemical characteristics was synthesized via a salt-assisted solid-state reaction using TiO2, LiOH, and various amounts of NaCl as a salt additive. The LTO particles exhibited a cubic spinel structure with homogenous micron-sized particles. The highest initial specific discharge capacity of LTO was 141.04 mAh/g with 4 wt % NaCl addition, which was tested in a full-cell (LTO/LiFePO4) battery. The battery cell showed self-recovery ability during the cycling test at 10 C-rate, which can extend the cycle life of the cell. The salt-assisted process affected the crystallinity of the LTO particles, which has a favorable effect on its electrochemical performance as anodes.

ACS Style

Agus Purwanto; Soraya Ulfa Muzayanha; Cornelius Satria Yudha; Hendri Widiyandari; Arif Jumari; Endah Retno Dyartanti; Muhammad Nizam; Muhamad Iqbal Putra. High Performance of Salt-Modified–LTO Anode in LiFePO4 Battery. Applied Sciences 2020, 10, 7135 .

AMA Style

Agus Purwanto, Soraya Ulfa Muzayanha, Cornelius Satria Yudha, Hendri Widiyandari, Arif Jumari, Endah Retno Dyartanti, Muhammad Nizam, Muhamad Iqbal Putra. High Performance of Salt-Modified–LTO Anode in LiFePO4 Battery. Applied Sciences. 2020; 10 (20):7135.

Chicago/Turabian Style

Agus Purwanto; Soraya Ulfa Muzayanha; Cornelius Satria Yudha; Hendri Widiyandari; Arif Jumari; Endah Retno Dyartanti; Muhammad Nizam; Muhamad Iqbal Putra. 2020. "High Performance of Salt-Modified–LTO Anode in LiFePO4 Battery." Applied Sciences 10, no. 20: 7135.

Journal article
Published: 26 September 2020 in Energies
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The dynamic behavior of the lithium-ion battery is evaluated by simulating the full battery system and each corresponding component, including the jellyroll and thin-foil electrodes. The thin-foil electrodes were evaluated using a novel design of split Hopkinson tensile bar (SHTB), while the jellyroll was evaluated using the split Hopkinson pressure bar (SHPB). A new stacking method was employed to strengthen the stress wave signal of the thin-foil electrodes in the SHTB simulation. The characteristic of the stress–strain curve should remain the same regardless of the amount of stacking. The jellyroll dynamic properties were characterized by using the SHPB method. The jellyroll was modeled with Fu-Chang foam and modified crushable foam and compared with experimental results at the loading speeds of 20 and 30 m/s. The dynamic behavior compared very well when it was modeled with Fu-Chang foam. These studies show that the dynamic characterization of Li-ion battery components can be evaluated using tensile loading of stacked layers of thin foil aluminum and copper with SHTB methodology as well as the compressive loading of jellyroll using SHPB methodology. Finally, the dynamic performance of the full system battery can be simulated by using the dynamic properties of each component, which were evaluated using the SHTB and SHPB methodologies.

ACS Style

Hafiz Fadillah; Sigit Puji Santosa; Leonardo Gunawan; Akbar Afdhal; Agus Purwanto. Dynamic High Strain Rate Characterization of Lithium-ion Nickel–Cobalt–Aluminum (NCA) Battery Using Split Hopkinson Tensile/Pressure Bar Methodology. Energies 2020, 13, 5061 .

AMA Style

Hafiz Fadillah, Sigit Puji Santosa, Leonardo Gunawan, Akbar Afdhal, Agus Purwanto. Dynamic High Strain Rate Characterization of Lithium-ion Nickel–Cobalt–Aluminum (NCA) Battery Using Split Hopkinson Tensile/Pressure Bar Methodology. Energies. 2020; 13 (19):5061.

Chicago/Turabian Style

Hafiz Fadillah; Sigit Puji Santosa; Leonardo Gunawan; Akbar Afdhal; Agus Purwanto. 2020. "Dynamic High Strain Rate Characterization of Lithium-ion Nickel–Cobalt–Aluminum (NCA) Battery Using Split Hopkinson Tensile/Pressure Bar Methodology." Energies 13, no. 19: 5061.

Journal article
Published: 05 June 2020 in Indonesian Journal of Chemistry
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The kinetics study of NCA leaching in the HCl system was proposed. Various kinetic models such as shrinking core, logarithmic rate law, and Avrami equation were used to find out the most appropriate kinetic models for this process. The effect of HCl concentrations, leaching temperatures, solid to liquid (S/L) ratio, and leaching duration were observed. The optimum conditions of NCA leaching were at HCl concentration of 4 M, temperature of 80 °C, S/L ratio of 100 g/L, and leaching time of 1 h. The result shows that shrinking core model with diffusion control process of residue layer describes well the leaching mechanism in this research, which is indicated by the good fitting of coefficient values of correlation (R2) and confirmed by the activation energy values of Ni, Co, Al that were less than 40 kJ/mol.

ACS Style

Soraya Ulfa Muzayanha; Cornelius Satria Yudha; Luthfi Mufidatul Hasanah; Linggar Tungga Gupita; Hendri Widiyandari; Agus Purwanto. Comparative Study of Various Kinetic Models on Leaching of NCA Cathode Material. Indonesian Journal of Chemistry 2020, 20, 1291 -1300.

AMA Style

Soraya Ulfa Muzayanha, Cornelius Satria Yudha, Luthfi Mufidatul Hasanah, Linggar Tungga Gupita, Hendri Widiyandari, Agus Purwanto. Comparative Study of Various Kinetic Models on Leaching of NCA Cathode Material. Indonesian Journal of Chemistry. 2020; 20 (6):1291-1300.

Chicago/Turabian Style

Soraya Ulfa Muzayanha; Cornelius Satria Yudha; Luthfi Mufidatul Hasanah; Linggar Tungga Gupita; Hendri Widiyandari; Agus Purwanto. 2020. "Comparative Study of Various Kinetic Models on Leaching of NCA Cathode Material." Indonesian Journal of Chemistry 20, no. 6: 1291-1300.

Journal article
Published: 01 June 2020 in Energies
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The high throughput and rapid flame-assisted spray pyrolysis method has been adapted to synthesize cathode materials LiNi0.apCo0.15Al0.035O2 (NCA). This method is considered low cost and simple. By varying the precursor solution concentration and sintering temperature, the optimal condition was established at temperature sintering of 800 °C and precursor solution concentration of 1 M. X-ray diffraction patterns showed the as-prepared NCA particles exhibit a pure well-ordered hexagonal layer structure with high crystallinity. Polyhedral shaped micro-sized particles are confirmed by SEM images. Galvanostic charge–discharge tests were conducted using cylindrical full-cell utilizing artificial graphite as the anode. The highest specific initial discharge capacity measured between 2.7 and 4.3 V is 155 mAh g−1 with capacity retention of 92% after cycled at 0.2 C for 50 cycles. Thus, this method is considered as a satisfying approach for NCA mass production.

ACS Style

Cornelius Satria Yudha; Soraya Ulfa Muzayanha; Mintarsih Rahmawati; Hendri Widiyandari; Wahyudi Sutopo; Muhammad Nizam; Sigit Puji Santosa; Agus Purwanto. Fast Production of High Performance LiNi0.815Co0.15Al0.035O2 Cathode Material via Urea-Assisted Flame Spray Pyrolysis. Energies 2020, 13, 2757 .

AMA Style

Cornelius Satria Yudha, Soraya Ulfa Muzayanha, Mintarsih Rahmawati, Hendri Widiyandari, Wahyudi Sutopo, Muhammad Nizam, Sigit Puji Santosa, Agus Purwanto. Fast Production of High Performance LiNi0.815Co0.15Al0.035O2 Cathode Material via Urea-Assisted Flame Spray Pyrolysis. Energies. 2020; 13 (11):2757.

Chicago/Turabian Style

Cornelius Satria Yudha; Soraya Ulfa Muzayanha; Mintarsih Rahmawati; Hendri Widiyandari; Wahyudi Sutopo; Muhammad Nizam; Sigit Puji Santosa; Agus Purwanto. 2020. "Fast Production of High Performance LiNi0.815Co0.15Al0.035O2 Cathode Material via Urea-Assisted Flame Spray Pyrolysis." Energies 13, no. 11: 2757.

Journal article
Published: 27 May 2019 in Metals
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An approach for a fast recycling process for Lithium Nickel Cobalt Aluminum Oxide (NCA) cathode scrap material without the presence of a reducing agent was proposed. The combination of metal leaching using strong acids (HCl, H2SO4, HNO3) and mixed metal hydroxide co-precipitation followed by heat treatment was investigated to resynthesize NCA. The most efficient leaching with a high solid loading rate (100 g/L) was obtained using HCl, resulting in Ni, Co, and Al leaching efficiencies of 99.8%, 95.6%, and 99.5%, respectively. The recycled NCA (RNCA) was successfully synthesized and in good agreement with JCPDS Card #87-1562. The highly crystalline RNCA presents the highest specific discharge capacity of a full cell (RNCA vs. Graphite) of 124.2 mAh/g with capacity retention of 96% after 40 cycles. This result is comparable with commercial NCA. Overall, this approach is faster than that in the previous study, resulting in more efficient and facile treatment of the recycling process for NCA waste and providing 35 times faster processing.

ACS Style

Soraya Ulfa Muzayanha; Cornelius Satria Yudha; Adrian Nur; Hendri Widiyandari; Hery Haerudin; Hanida Nilasary; Ferry Fathoni; Agus Purwanto. A Fast Metals Recovery Method for the Synthesis of Lithium Nickel Cobalt Aluminum Oxide Material from Cathode Waste. Metals 2019, 9, 615 .

AMA Style

Soraya Ulfa Muzayanha, Cornelius Satria Yudha, Adrian Nur, Hendri Widiyandari, Hery Haerudin, Hanida Nilasary, Ferry Fathoni, Agus Purwanto. A Fast Metals Recovery Method for the Synthesis of Lithium Nickel Cobalt Aluminum Oxide Material from Cathode Waste. Metals. 2019; 9 (5):615.

Chicago/Turabian Style

Soraya Ulfa Muzayanha; Cornelius Satria Yudha; Adrian Nur; Hendri Widiyandari; Hery Haerudin; Hanida Nilasary; Ferry Fathoni; Agus Purwanto. 2019. "A Fast Metals Recovery Method for the Synthesis of Lithium Nickel Cobalt Aluminum Oxide Material from Cathode Waste." Metals 9, no. 5: 615.

Journal article
Published: 17 May 2019 in Energies
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Nickel-rich cathode material, NCA (85:14:1), is successfully synthesized using two different, simple and economical batch methods, i.e., hydroxide co-precipitation (NCA-CP) and the hydroxides solid state reaction method (NCA-SS), followed by heat treatments. Based on the FTIR spectra, all precursor samples exhibit two functional groups of hydroxide and carbonate. The XRD patterns of NCA-CP and NCA-SS show a hexagonal layered structure (space group: R_3m), with no impurities detected. Based on the SEM images, the micro-sized particles exhibit a sphere-like shape with aggregates. The electrochemical performances of the samples were tested in a 18650-type full-cell battery using artificial graphite as the counter anode at the voltage range of 2.7–4.25 V. All samples have similar characteristics and electrochemical performances that are comparable to the commercial NCA battery, despite going through different synthesis routes. In conclusion, the overall results are considered good and have the potential to be adapted for commercialization.

ACS Style

Cornelius Satria Yudha; Soraya Ulfa Muzayanha; Hendri Widiyandari; Ferry Iskandar; Wahyudi Sutopo; Agus Purwanto. Synthesis of LiNi0.85Co0.14Al0.01O2 Cathode Material and its Performance in an NCA/Graphite Full-Battery. Energies 2019, 12, 1886 .

AMA Style

Cornelius Satria Yudha, Soraya Ulfa Muzayanha, Hendri Widiyandari, Ferry Iskandar, Wahyudi Sutopo, Agus Purwanto. Synthesis of LiNi0.85Co0.14Al0.01O2 Cathode Material and its Performance in an NCA/Graphite Full-Battery. Energies. 2019; 12 (10):1886.

Chicago/Turabian Style

Cornelius Satria Yudha; Soraya Ulfa Muzayanha; Hendri Widiyandari; Ferry Iskandar; Wahyudi Sutopo; Agus Purwanto. 2019. "Synthesis of LiNi0.85Co0.14Al0.01O2 Cathode Material and its Performance in an NCA/Graphite Full-Battery." Energies 12, no. 10: 1886.

Journal article
Published: 01 December 2018 in Journal of Mathematical and Fundamental Sciences
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Lithium titanate, LTO, was synthesized by solid state reaction with Li2CO3 and TiO2 powder as precursors. The result was characterized to investigate its crystal structure, phase content, cell parameters, surface morphology, electrical conductivity and its performance as electrode in a lithium ion battery. XRD analysis with Le Bail refinement showed that the prepared materials consisted of 4 phases of Li4Ti5O12, Li2TiO3, anatase TiO2 and rutile TiO2. The surface morphology was still not homogeneous, with an average grain size of 0.533 ± 0.157 µm. When 1% LTO was mixed with graphite and used as anode of an LFP battery, it produced a specific capacity of 130.66 mAhg‑1 with Coulombic efficiency of 94.2%. When the composition was 5% of the total anode powder, the specific capacity was 118.74 mAhg-1 and Coulombic efficiency was 92.72%.

ACS Style

Viona Natalia; Anggia Putri Gustami Anggia Putri Gustami; Fitria Rahmawati; Witri Wahyu Lestari; Agus Purwanto. Lithium Titanate (LTO) Synthesis Through Solid State Reaction and Its Performance for LiFePO4/LTO Battery. Journal of Mathematical and Fundamental Sciences 2018, 50, 290 -302.

AMA Style

Viona Natalia, Anggia Putri Gustami Anggia Putri Gustami, Fitria Rahmawati, Witri Wahyu Lestari, Agus Purwanto. Lithium Titanate (LTO) Synthesis Through Solid State Reaction and Its Performance for LiFePO4/LTO Battery. Journal of Mathematical and Fundamental Sciences. 2018; 50 (3):290-302.

Chicago/Turabian Style

Viona Natalia; Anggia Putri Gustami Anggia Putri Gustami; Fitria Rahmawati; Witri Wahyu Lestari; Agus Purwanto. 2018. "Lithium Titanate (LTO) Synthesis Through Solid State Reaction and Its Performance for LiFePO4/LTO Battery." Journal of Mathematical and Fundamental Sciences 50, no. 3: 290-302.

Original paper
Published: 07 November 2018 in Chemical Papers
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Lithium zirconate, Li2ZrO3 (LZO), was added to graphite anode at various compositions of 0%, 20%, and 30% of weight, and used in a LiFePO4 (LFP) battery fabrication. The battery cells were designated as LFP//G, LFP//20LZOG, and LFP//30LZOG, respectively. Herein, battery performance was tested to understand LZO contribution to the LFP cathode at different current rates. The data taken were specific capacity of battery, anodic current density, and a crystallite volume change after 50 cycles of charge–discharge. The result found that addition of 20% weight LZO to graphite increases discharge specific capacity after 50 cycles from 71.87 to 72.53 mAhg−1 with Coulombic efficiency of 99.73%. The capacity retention is 62.1%, which is higher than LFP//G, i.e., 57.7%. The anodic current density of LFP//20LZOG is 9.09 × 10−6 Acm−2, also higher than the current density of LFP//G, i.e., 8.91 × 10−8 Acm−2. It indicates contribution of LZO to increase electrochemical reaction rate during battery usage. Structural investigation shows that the LZO addition decreases the volume change of anode material after 50 cycles of charge–discharge under 1C current rate. It indicates that Li2ZrO3 has good structural stability.

ACS Style

Viona Natalia; Fitria Rahmawati; Arinta Wulandari; Agus Purwanto. Graphite/Li2ZrO3 anode for a LiFePO4 battery. Chemical Papers 2018, 73, 757 -766.

AMA Style

Viona Natalia, Fitria Rahmawati, Arinta Wulandari, Agus Purwanto. Graphite/Li2ZrO3 anode for a LiFePO4 battery. Chemical Papers. 2018; 73 (3):757-766.

Chicago/Turabian Style

Viona Natalia; Fitria Rahmawati; Arinta Wulandari; Agus Purwanto. 2018. "Graphite/Li2ZrO3 anode for a LiFePO4 battery." Chemical Papers 73, no. 3: 757-766.

Accepted manuscript
Published: 05 November 2018 in Materials Research Express
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In this study, polyvinylpyrrolidone sulfur/reduced graphene oxide (S/[email protected]) composite for lithium-sulfur batteries was produced. Reduced graphene oxide is used to improve the conductivity of both ionic and electronic conductivity due to poor sulfur conductivity (5 x 10-30 S/cm). Graphene oxide (GO) was synthesized using modified Marcano and Hummer methods. Sulfur (S8) was prepared using the dissolution-crystallization method followed by microwave treatment to reduce the graphene oxide and sulfur impregnation into a graphene oxide reduction structure (rGO). Addition of PVP was varied at 0, 50, 67, and 75 wt% of S/rGO, with variation of microwave time at 10, 20, and 30 min. The X-ray Diffraction (XRD) pattern showed that sulfur and PVP crystals had been formed. Morphological characterization using Scanning Electron Microscopy (SEM) showed a structure of thin layers of the rGO with small layers of PVP, while Transmission Electron Microscopy (TEM) showed black dots that are characteristic of sulfur particles. TEM showed that the sulfur particles had an average size of 12.8 nm. The C-S bond in the FTIR spectrum indicates that there was an S bond in the rGO. The EIS measurement showed a tendency of adding PVP mass, which increased the value of charge transfer resistance (Rct). On the other hand, four-point probe measurements showed that the addition of PVP mass can also decrease the conductivity. Meanwhile, microwave radiation also affects Rct. The addition of microwave radiation time decreases the value of Rct and increases the conductivity of the sample.

ACS Style

Ferry Iskandar; Bramianto Setiawan; Tirta Rona Mayangsari; Retno Maharsi; Agus Purwanto; Akfiny Hasdi Aimon. Electrochemical impedance analysis of polyvinylpyrrolidone-coated sulfur/reduced graphene oxide (S/rGO) electrode. Materials Research Express 2018, 6, 025514 .

AMA Style

Ferry Iskandar, Bramianto Setiawan, Tirta Rona Mayangsari, Retno Maharsi, Agus Purwanto, Akfiny Hasdi Aimon. Electrochemical impedance analysis of polyvinylpyrrolidone-coated sulfur/reduced graphene oxide (S/rGO) electrode. Materials Research Express. 2018; 6 (2):025514.

Chicago/Turabian Style

Ferry Iskandar; Bramianto Setiawan; Tirta Rona Mayangsari; Retno Maharsi; Agus Purwanto; Akfiny Hasdi Aimon. 2018. "Electrochemical impedance analysis of polyvinylpyrrolidone-coated sulfur/reduced graphene oxide (S/rGO) electrode." Materials Research Express 6, no. 2: 025514.

Journal article
Published: 26 September 2018 in Materials Research Express
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ACS Style

Agus Purwanto; Cornelius Satria Yudha; U Ubaidillah; Hendri Widiyandari; Takashi Ogi; Hery Haerudin. NCA cathode material: synthesis methods and performance enhancement efforts. Materials Research Express 2018, 5, 122001 .

AMA Style

Agus Purwanto, Cornelius Satria Yudha, U Ubaidillah, Hendri Widiyandari, Takashi Ogi, Hery Haerudin. NCA cathode material: synthesis methods and performance enhancement efforts. Materials Research Express. 2018; 5 (12):122001.

Chicago/Turabian Style

Agus Purwanto; Cornelius Satria Yudha; U Ubaidillah; Hendri Widiyandari; Takashi Ogi; Hery Haerudin. 2018. "NCA cathode material: synthesis methods and performance enhancement efforts." Materials Research Express 5, no. 12: 122001.

Journal article
Published: 01 July 2018 in Membranes
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In this paper, we present the characteristics and performance of polymer electrolyte membranes (PEMs) based on poly(vinylidene fluoride) (PVDF). The membranes were prepared via a phase-inversion method (non-solvent-induced phase separation (NIPS)). As separators for lithium battery systems, additive modified montmorillonite (MMT) nano-clay served as a filler and poly(vinylpyrrolidone) (PVP) was used as a pore-forming agent. The membranes modified with an additive (8 wt % nano-clay and 7 wt % PVP) showed an increased porosity (87%) and an uptake of a large amount of electrolyte (801.69%), which generated a high level of ionic conductivity (5.61 mS cm−1) at room temperature. A graphite/PEMs/LiFePO4 coin cell CR2032 showed excellent stability in cycling performance (average discharge capacity 127 mA h g−1). Based on these results, PEMs are promising materials to be used in Polymer Electrolyte Membranes in lithium-ion batteries.

ACS Style

Endah Dyartanti; Agus Purwanto; I. Widiasa; Heru Susanto. Ionic Conductivity and Cycling Stability Improvement of PVDF/Nano-Clay Using PVP as Polymer Electrolyte Membranes for LiFePO4 Batteries. Membranes 2018, 8, 36 .

AMA Style

Endah Dyartanti, Agus Purwanto, I. Widiasa, Heru Susanto. Ionic Conductivity and Cycling Stability Improvement of PVDF/Nano-Clay Using PVP as Polymer Electrolyte Membranes for LiFePO4 Batteries. Membranes. 2018; 8 (3):36.

Chicago/Turabian Style

Endah Dyartanti; Agus Purwanto; I. Widiasa; Heru Susanto. 2018. "Ionic Conductivity and Cycling Stability Improvement of PVDF/Nano-Clay Using PVP as Polymer Electrolyte Membranes for LiFePO4 Batteries." Membranes 8, no. 3: 36.

Journal article
Published: 01 June 2018 in Evergreen
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ACS Style

Endah R Dyartanti; I Nyoman Widiasa; Agus Purwanto; Heru Susanto. Nanocomposite Polymer Electrolytes in PVDF/ZnO Membranes Modified with PVP for LiFePO_4 Batteries. Evergreen 2018, 5, 19 -25.

AMA Style

Endah R Dyartanti, I Nyoman Widiasa, Agus Purwanto, Heru Susanto. Nanocomposite Polymer Electrolytes in PVDF/ZnO Membranes Modified with PVP for LiFePO_4 Batteries. Evergreen. 2018; 5 (2):19-25.

Chicago/Turabian Style

Endah R Dyartanti; I Nyoman Widiasa; Agus Purwanto; Heru Susanto. 2018. "Nanocomposite Polymer Electrolytes in PVDF/ZnO Membranes Modified with PVP for LiFePO_4 Batteries." Evergreen 5, no. 2: 19-25.

Journal article
Published: 22 May 2018 in Japanese Journal of Applied Physics
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ACS Style

Hendri Widiyandari; Adi Prasetio; Agus Purwanto; Agus Subagio; Rachmat Hidayat. Platinum-free, carbon-based materials as efficient counter electrodes for dye-sensitized solar cells. Japanese Journal of Applied Physics 2018, 57, 1 .

AMA Style

Hendri Widiyandari, Adi Prasetio, Agus Purwanto, Agus Subagio, Rachmat Hidayat. Platinum-free, carbon-based materials as efficient counter electrodes for dye-sensitized solar cells. Japanese Journal of Applied Physics. 2018; 57 (6):1.

Chicago/Turabian Style

Hendri Widiyandari; Adi Prasetio; Agus Purwanto; Agus Subagio; Rachmat Hidayat. 2018. "Platinum-free, carbon-based materials as efficient counter electrodes for dye-sensitized solar cells." Japanese Journal of Applied Physics 57, no. 6: 1.

Journal article
Published: 16 May 2018 in Jurnal Teknologi
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The composition of both the polymer solution and the non-solvent determines the resulted membrane morphology during membrane preparation through non-solvent induced phase separation (NIPS) method. In the porous polymer electrolyte membranes (PEMs), a specified porosity and uniform pore membranes are required; therefore prediction of membrane morphology is essential. The Dimensional parameter of thermodynamic was determined to find the diffusional rate between DMAc solvent and Water nonsolvent during the membranes preparation. The influences of the addition of nano-clay as filler and polyvinylpyrrolidone (PVP) addition as pore-forming agent on the thermodynamic parameter were investigated. The resulted nanocomposites were characterized by measuring their porosity and electrolyte uptake as well as by a scanning electron microscopy. The composition of non-solvent required to induce phase separation of the casting solution was determined by cloud point experiment. By adding the content of additives the binodal line shifts to polymer/solvent axis, moreover MG reduces and DSBC raises and the thermodynamic parameter increased. It was obtained that the solubility parameters (Di/j) between solvent-additive are DDMAc/nano-clay = 0.787 (MPa0.5), DPVP/DMAc = 5.536 (MPa0.5), and The Interaction parameters (c) are cDMAc/nano-clay = 1.661 (MPa0.5), cDMAc/PVP = 1.449 (MPa0.5).

ACS Style

Endah R Dyartanti; Agus Purwanto; I Nyoman Widiasa; Heru Susanto. THERMODYNAMIC STUDY OF POLYMER ELECTROLYTE MEMBRANE PREPARATION BY NON-SOLVENT INDUCED PHASE SEPARATION. Jurnal Teknologi 2018, 80, 1 .

AMA Style

Endah R Dyartanti, Agus Purwanto, I Nyoman Widiasa, Heru Susanto. THERMODYNAMIC STUDY OF POLYMER ELECTROLYTE MEMBRANE PREPARATION BY NON-SOLVENT INDUCED PHASE SEPARATION. Jurnal Teknologi. 2018; 80 (3-2):1.

Chicago/Turabian Style

Endah R Dyartanti; Agus Purwanto; I Nyoman Widiasa; Heru Susanto. 2018. "THERMODYNAMIC STUDY OF POLYMER ELECTROLYTE MEMBRANE PREPARATION BY NON-SOLVENT INDUCED PHASE SEPARATION." Jurnal Teknologi 80, no. 3-2: 1.

Review
Published: 01 April 2018 in TELKOMNIKA (Telecommunication Computing Electronics and Control)
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The development of Battery Management System (BMS) standards in Indonesia has been carried out causing the FACTS approach. That's approach makes it possible to accommodate all stakeholder requirements. However, the approach has not yet considered a technical review of the regulated standards. Based on this, this study undertook a comprehensive review of BMS performance parameters set out in the standard. In order that the regulated standards not only accommodate the needs of stakeholders but also consider BMS technical studies in order not to impede the future development of BMS.

ACS Style

Wahyudi Sutopo; Budhy Rahmawatie; Fakhrina Fahma; Muhammad Nizam; Agus Purwanto; B.B Louhenapessy; Evizal Abdul Kadir. A Technical Review of BMS Performance Standard for Electric Vehicle Applications in Indonesia. TELKOMNIKA (Telecommunication Computing Electronics and Control) 2018, 16, 544 -549.

AMA Style

Wahyudi Sutopo, Budhy Rahmawatie, Fakhrina Fahma, Muhammad Nizam, Agus Purwanto, B.B Louhenapessy, Evizal Abdul Kadir. A Technical Review of BMS Performance Standard for Electric Vehicle Applications in Indonesia. TELKOMNIKA (Telecommunication Computing Electronics and Control). 2018; 16 (2):544-549.

Chicago/Turabian Style

Wahyudi Sutopo; Budhy Rahmawatie; Fakhrina Fahma; Muhammad Nizam; Agus Purwanto; B.B Louhenapessy; Evizal Abdul Kadir. 2018. "A Technical Review of BMS Performance Standard for Electric Vehicle Applications in Indonesia." TELKOMNIKA (Telecommunication Computing Electronics and Control) 16, no. 2: 544-549.

Journal article
Published: 01 April 2018 in Materials Research Express
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ACS Style

Agus Purwanto; Arif Jumari; Muhammad Nizam; Hendri Widiyandari; Sudaryanto; Deswita; Ahmad Azmin Mohamad. Improving cylinder-type LiFePO4 battery performance via control of internal resistance. Materials Research Express 2018, 5, 045512 .

AMA Style

Agus Purwanto, Arif Jumari, Muhammad Nizam, Hendri Widiyandari, Sudaryanto, Deswita, Ahmad Azmin Mohamad. Improving cylinder-type LiFePO4 battery performance via control of internal resistance. Materials Research Express. 2018; 5 (4):045512.

Chicago/Turabian Style

Agus Purwanto; Arif Jumari; Muhammad Nizam; Hendri Widiyandari; Sudaryanto; Deswita; Ahmad Azmin Mohamad. 2018. "Improving cylinder-type LiFePO4 battery performance via control of internal resistance." Materials Research Express 5, no. 4: 045512.

Conference paper
Published: 09 February 2018 in THE 1ST INTERNATIONAL CONFERENCE AND EXHIBITION ON POWDER TECHNOLOGY INDONESIA (ICePTi) 2017
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The process in industry, including in mining industry, would surely give negative effect such as waste polluting to the environment. Some of waste could be potentially reutilized to be a commodity with the higher economic value. Tin slag is one of them. The aim of this research was to recover the tin contained in tin slag. Before coming to the electrolysis, tin slag must be treated by dissolution. The grinded tin slag was dissolved into HCl solution to form a slurry. During dissolution, the slurry was agitated and heated, and finally filtered. The filtrate obtained was then electrolyzed. During the process of electrolysis, solid material precipitated on the used cathode. The precipitated solid was then separated and dried. The solid was then analyzed using XRD, XRF and SEM. The XRD analysis showed that the longest time of dissolution and electrolysis the highest the purity obtained in the product. The SEM analysis showed that the longest time of electrolysis the smallest tin particle obtained. Optimum time achieved in this research was 2 hours for the recovering time and 3 hours for the electrolysis time, with 9% tin recovered.

ACS Style

Arif Jumari; Agus Purwanto; Adrian Nur; Annata Wahyu Budiman; Metty Lerian; Fransisca A. Paramita. Tin recovery from tin slag using electrolysis method. THE 1ST INTERNATIONAL CONFERENCE AND EXHIBITION ON POWDER TECHNOLOGY INDONESIA (ICePTi) 2017 2018, 1931, 030011 .

AMA Style

Arif Jumari, Agus Purwanto, Adrian Nur, Annata Wahyu Budiman, Metty Lerian, Fransisca A. Paramita. Tin recovery from tin slag using electrolysis method. THE 1ST INTERNATIONAL CONFERENCE AND EXHIBITION ON POWDER TECHNOLOGY INDONESIA (ICePTi) 2017. 2018; 1931 (1):030011.

Chicago/Turabian Style

Arif Jumari; Agus Purwanto; Adrian Nur; Annata Wahyu Budiman; Metty Lerian; Fransisca A. Paramita. 2018. "Tin recovery from tin slag using electrolysis method." THE 1ST INTERNATIONAL CONFERENCE AND EXHIBITION ON POWDER TECHNOLOGY INDONESIA (ICePTi) 2017 1931, no. 1: 030011.