Hesham Khalifa

Dr. Hesham Khalifa

Faculty of Engineering, University of Porto, Porto, Portugal
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orcid
Post-Doctoral Researcher Department of Mechanical Engineerin...

Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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8 September 2017 in Journal of Materials Chemistry B
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Journal Article
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NANaeem Akhtar
Naeem Akhtar
MEMohammed Y. Emran
Mohammed Y. Emran
Mohamed Alkhodary ShenashenMohamed Alkhodary Shenashen
Mohamed Alkhodary Shenashen
Hesham KhalifaHesham Khalifa
Hesham Khalifa
TOTetsuya Osaka
Tetsuya Osaka
Sherif El-SaftySherif El-Safty
Sherif El-Safty
The controlled design of hierarchical CN-ST flowers is a key feature for creating biosensor surface electrodes for photo-electrochemical, ultrasensitive screening of mono-bioactive molecules.

12 September 2017 in Microchimica Acta
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MEMohammed Y. Emran
Mohammed Y. Emran
Hesham KhalifaHesham Khalifa
Hesham Khalifa
HGHassanien Gomaa
Hassanien Gomaa
Mohamed Alkhodary ShenashenMohamed Alkhodary Shenashen
Mohamed Alkhodary Shenashen
NANaeem Akhtar
Naeem Akhtar
Sherif El-SaftySherif El-Safty
Sherif El-Safty

16 March 2018 in Journal of Applied Electrochemistry
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Journal Article
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MEMohammed Y. Emran
Mohammed Y. Emran
Mohamed Alkhodary ShenashenMohamed Alkhodary Shenashen
Mohamed Alkhodary Shenashen
AAAdel A. Abdelwahab
Adel A. Abdelwahab
Hesham KhalifaHesham Khalifa
Hesham Khalifa
MMMoataz Mekawy
Moataz Mekawy
Sherif El-SaftySherif El-Safty
Sherif El-Safty

17 October 2017 in ACS Sustainable Chemistry & Engineering
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Journal Article
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HGHassanien Gomaa
Hassanien Gomaa
Hesham KhalifaHesham Khalifa
Hesham Khalifa
Mahmoud SalehMahmoud Saleh
Mahmoud Saleh
Mohamed Alkhodary ShenashenMohamed Alkhodary Shenashen
Mohamed Alkhodary Shenashen
SKS. Kawada
S. Kawada
Sherif El-SaftySherif El-Safty
Sherif El-Safty

10 October 2019 in Nano-Micro Letters
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Journal Article
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Hesham KhalifaHesham Khalifa
Hesham Khalifa
Sherif El-SaftySherif El-Safty
Sherif El-Safty
ARA. Reda
A. Reda
MSM. A. Shenashen
M. A. Shenashen
Mahmoud SalehMahmoud Saleh
Mahmoud Saleh
HMH. A. Metawa
H. A. Metawa
To control the power hierarchy design of lithium-ion battery (LIB) built-up sets for electric vehicles (EVs), we offer intensive theoretical and experimental sets of choice anode/cathode architectonics that can be modulated in full-scale LIB built-up models. As primary structural tectonics, heterogeneous composite superstructures of full-cell-LIB (anode//cathode) electrodes were designed in closely packed flower agave rosettes TiO2@C (FRTO@C anode) and vertical-star-tower LiFePO4@C (VST@C cathode) building blocks to regulate the electron/ion movement in the three-dimensional axes and orientation pathways. The superpower hierarchy surfaces and multi-directional orientation components may create isosurface potential electrodes with mobile electron movements, in-to-out interplay electron dominances, and electron/charge cloud distributions. This study is the first to evaluate the hotkeys of choice anode/cathode architectonics to assemble different LIB–electrode platforms with high-mobility electron/ion flows and high-performance capacity functionalities. Density functional theory calculation revealed that the FRTO@C anode and VST-(i)@C cathode architectonics are a superior choice for the configuration of full-scale LIB built-up models. The integrated FRTO@C//VST-(i)@C full-scale LIB retains a huge discharge capacity (~ 94.2%), an average Coulombic efficiency of 99.85% after 2000 cycles at 1 C, and a high energy density of 127 Wh kg−1, thereby satisfying scale-up commercial EV requirements.

11 February 2020 in National Science Review
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Journal Article
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Hesham KhalifaHesham Khalifa
Hesham Khalifa
Sherif El-SaftySherif El-Safty
Sherif El-Safty
ARAbdullah Reda
Abdullah Reda
Mohamed Alkhodary ShenashenMohamed Alkhodary Shenashen
Mohamed Alkhodary Shenashen
AEAlaa I Eid
Alaa I Eid
We report on low-cost fabrication and high-energy density of full-cell lithium-ion battery (LIB) models. Super-hierarchical electrode architectures of Li2SiO3/TiO2@nano-carbon anode (LSO.TO@nano-C) and high-voltage olivine LiMnPO4@nano-carbon cathode (LMPO@nano-C) are designed for half- and full-system LIB-CR2032 coin cell models. On the basis of primary architecture-power-driven LIB geometrics, the structure keys including three-dimensional (3D) modeling superhierarchy, multiscale micro/nano architectures and anisotropic surface heterogeneity affect the buildup design of anode/cathode LIB electrodes. Such hierarchical electrode surface topologies enable continuous in-/out-flow rates and fast transport pathways of Li+-ions during charge/discharge cycles. The stacked layer configurations of pouch LIB-types lead to excellent charge/discharge rate, and energy density of 237.6 Wh kg−1. As the most promising LIB-configurations, the high specific energy density of hierarchical pouch battery systems may improve energy storage for long-driving range of electric vehicles. Indeed, the anisotropic alignments of hierarchical electrode architectures in the large-scale LIBs provide proof of excellent capacity storage and outstanding durability and cyclability. The full-system LIB-CR2032 coin cell models maintain high specific capacity of ∼89.8% within a long-term life period of 2000 cycles, and average Coulombic efficiency of 99.8% at 1C rate for future configuration of LIB manufacturing and commercialization challenges.