Li₄Ti₅O₁₂ (LTO) is an alternative anode material to substitute commercial graphite for lithium-ion batteries due to its superior long cycle life, small volume change (zero strain), good thermal stability, and relatively high power. In this work, iodide-doped LTO is prepared by solid-state reaction method via ball milling method and subsequently calcined at 750 °C for 10 h in air atmosphere. X-ray diffraction (XRD) of iodide-doped LTO reveals the spinel cubic structure without any impurities detected. The 0.2 mol lithium iodide-doped LTO shows enhanced high-rate capability with a specific discharge capacity of 123.31 mAh g⁻¹ at 15 C. The long cyclic performance of 0.2 mol lithium iodide-doped LTO delivers a specific discharge capacity of 171.19 mAh g⁻¹ at 1 C with a capacity retention of 99.15% after 100 cycles. It shows that the iodide-doped LTO is a promising strategy for preparing a high electrochemical performance of LTO for the anode of lithium-ion batteries.

Thermal conductivity and adhesion strength effects were studied for thermal barrier coatings (TBCs) with different particle sizes, YSZ content, time, and temperature curing.

The utilization of adhesive compounds in bonding lightweight and high-performance composite structures, including carbon fiber reinforced polymer (CFRP) composites, has garnered significant attention from researchers. This study presents the novel application of Al₂O₃ coated with TiO₂ as a thermal protective layer for CFRP substrate. Initially, the CFRP substrate underwent a protective treatment involving the application of Al₂O₃ as a middle coat, followed by a further protective layer consisting of TiO₂ as a top coat. The deposition of TiO₂ onto an Al₂O₃-based thermal barrier coating (TBC) was carried out utilizing the flame spray method. The use of a TiO₂ coating as a top coat was employed to enhance protection and heat dispersion across the middle coat and substrate. In order to achieve sufficient adhesion between the CFRP substrate, an intermediate coat consisting of Al₂O₃ with a Na₂SiO₃ binder, the impact of varying nozzle distances on adhesion strength and pull-off test outcomes was investigated, with a nozzle distance of 180 mm yielding the highest adhesion strength. The thermal stability of a CFRP substrate was enhanced through the deposition of a layer of TiO₂ on Al₂O₃. The surface and cross-sectional morphologies of the composite were analyzed using a Scanning Electron Microscope (SEM). It was observed that the presence of a TBC on the composite surface effectively reduced the amount of heat that was transferred to the composite material. In order to assess the effectiveness of TBC on CFRP substrates, a series of experiments involving thermal torch and conductivity tests were undertaken. The interaction between the top and middle coats of a composite material results in enhanced mechanical properties, hence improving its thermal insulation capabilities. The artificially produced TBC coatings have the potential to function as adhesive materials, ensuring the sustained high performance of CFRP substrates.

Escalation of CO₂ concentration in atmosphere worsens the effect of global warming. CO₂ conversion to fuel using photocatalytic process is one of the solutions to reduce the gasses. Reduced Graphene Oxide (rGO) has specific surface area, high electron conductivity and adsorption capacity so that it’s potentially applied in photocatalytic processes. CuO is a semiconductor which has a high specific surface area, high abundance and low cost. rGO which combined with semiconductor has an ability to store and conduct electron through transfer electron process that plays the most important role in photocatalytic reaction activity. This study uses rGO/CuO composite to convert CO₂ to methanol by photocatalytic process material to convert CO₂ into methanol. rGO and CuO were linked by ammonia in a various weight ratio (1 %, 2%, and 4 %). Photocatalytic of rGO/CuO is explored for reduction of CO₂ into methanol under the visible light irradiation with irradiation time 2 h, 4 h, and 6 h. rGO/CuO material is characterized using XRD, SEM, BET and UV-Vis, while the amount of produced CO₂ is examined using GC-MS. rGO/CuO composites with ratio 1 % and irradiation time 2 h exhibited good photocatalytic activity owing high yield methanol. rGO/CuO composites are potential materials to convert CO₂ into methanol.