Date of Award
Mechanical, Automotive, and Materials Engineering
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In this study, plasma-assisted electrolytic deposition was innovatively applied to rapid construction of binder-free amorphous Co(OH)2 and Ni3(PO4)2 thin film anodes on Ti for lithium-ion batteries. In the electrochemical testing, both materials showed high-capacity. However, compared with amorphous Co(OH)2 coating, the amorphous Ni3(PO4)2 coating has the better stability and the lower thickness, which is more hopeful for industrial application. Therefore, it is necessary to further study on Ni3(PO4)2 anode. In comparative electrochemical study between the amorphous and crystalline Ni3(PO4)2, the amorphous Ni3(PO4)2 showed a lower degradation rate on capacity, while the crystalline one had a higher capacity in the initial several cycles. Nevertheless, both amorphous and crystalline Ni3(PO4)2 shows high capacity during cycling due to the high porosity of the films. To further improve the electrochemical performance of amorphous Ni3(PO4)2 anodes in lithium-ion batteries, some possible surface modification methods including the Co-doping, sputtering Au coating and carbon coating were explored. The results indicated that the sputtering Au coating and sputtering carbon coating could be the better ways to improve the cycling stability and capacity of amorphous Ni3(PO4)2 anodes.
Li, Tao, "Plasma‐Assisted Electrolytic Deposition for Synthesizing Porous Flexible Binder‐Free Anodes of High‐Electrochemical Performance Lithium‐Ion Batteries" (2019). Electronic Theses and Dissertations. 7717.