Journal article 76 views 20 downloads
Electrolyte tailoring and interfacial engineering for safe and high-temperature lithium-ion batteries
,
Shu Hong,
Bo Hong,
Yaxuan Fu,
Die Liu ,
Rui Tan ,
Pingshan Wang ,
Yanqing Lai
Energy & Environmental Science
Swansea University Author:
Rui Tan
-
PDF | Version of Record
© The Royal Society of Chemistry 2025. This Open Access Article is licensed under a Creative Commons Attribution-Non Commercial 3.0 Unported Licence.
Download (3.73MB)
DOI (Published version): 10.1039/d4ee05263c
Abstract
The deployment of lithium-ion batteries, essential for military and space exploration applications, faces restrictions due to safety issues and performance degradation stemming from the uncontrollable side reactions between electrolytes and electrodes, particularly at high temperatures. Current rese...
| Published in: | Energy & Environmental Science |
|---|---|
| ISSN: | 1754-5692 1754-5706 |
| Published: |
Royal Society of Chemistry (RSC)
2025
|
| Online Access: |
Check full text
|
| URI: | https://cronfa.swan.ac.uk/Record/cronfa68990 |
| Abstract: |
The deployment of lithium-ion batteries, essential for military and space exploration applications, faces restrictions due to safety issues and performance degradation stemming from the uncontrollable side reactions between electrolytes and electrodes, particularly at high temperatures. Current research focuses on interfacial modification and non-flammable electrolyte development, which fails to simultaneously improve both safety and cyclic performance. This work introduces a synergistic approach by incorporating weakly polar methyl 2,2-difluoro-2-(fluorosulfonyl)acetate (MDFSA) and non-flammable 2-(2,2,2-trifluoroethoxy)-1,3,2-dioxaphospholane 2-oxide (TFP) to achieve a localized high-concentration electrolyte (LHCE) that can stabilize both anode and cathode interfaces and thus improve the cycling life and safety of batteries, particularly at evaluated temperatures. As a result, the NCM811|Gr pouch cell with MDFSA-containing LHCE exhibits a high capacity retention rate of 79.6% at 60 °C after 1200 cycles due to the formation of thermally and structurally stable interfaces on the electrodes, outperforming pouch cells utilizing commercial carbonate-based (capacity retention: 23.7% after 125 cycles). Additionally, pouch cells in the charging state also exhibit commendable safety performance, indicating potential for practical applications. |
|---|---|
| College: |
Faculty of Science and Engineering |
| Funders: |
We gratefully acknowledge the National Natural Science Foundation of China (No. 52034011 and 52101278), the Young Elite Scientists Sponsorship Program by CAST (2023QNRC001), the Fundamental Research Funds for Central Universities of the Central South University (2022ZZTS0405) and the Central South University Research Programme of Advanced Interdisciplinary Studies (2023QYJC005). R. T. acknowledges the RSC researcher collaboration grant (C23-8220221815) and the Royce Industrial Collaboration Grant (RICP-R4-100029). |