Photo-assisted enhancement of lithium-ion battery performance with a LiFePO4/TiO2 composite cathode

The development of photo-assisted lithium-ion batteries (P-LIBs) holds immense promise for enhancing battery performance and enabling self-charging capabilities. However, the realization of these transformative devices hinges on the creation of novel photoelectrodes with exceptional light absorption...

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Bibliographic Details
Published in:Ceramics international 2024-04, Vol.50 (7), p.11291-11297
Main Authors: Cui, Can, Wang, Xiying, Zhu, Hongzheng, Jin, Yishu, Li, Yiheng, Pang, Beili, Shang, Mingwei, Dong, Hongzhou, Yu, Liyan, Dong, Lifeng
Format: Article
Language:English
Subjects:
LiFePO4
Lithium-ion batteries
Photo-assisted battery
Photo-cathode
TiO2
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Summary:The development of photo-assisted lithium-ion batteries (P-LIBs) holds immense promise for enhancing battery performance and enabling self-charging capabilities. However, the realization of these transformative devices hinges on the creation of novel photoelectrodes with exceptional light absorption and electrochemical properties. In this study, we introduce a composite photocathode composed of TiO2 and LiFePO4, demonstrating remarkable dual functionality for light-to-electricity conversion and energy storage. Comparative analysis reveals substantial improvements in the charge/discharge capacity of P-LIBs under sunlight, with enhancements of 6.6 % and 4.6 % at a 0.5 C rate. Our findings attribute these performance gains to rapid Li+ conduction, facilitating complete valence state transitions between Fe2+ and Fe3+ under sunlight conditions. This work paves the way for significant advancements in photoelectrode design for P-LIBs.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2024.01.029