LiNbO3-coated LiNi0.7Co0.1Mn0.2O2 and chlorine-rich argyrodite enabling high-performance solid-state batteries under different temperatures
发布时间：2022-02-08
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- 论文类型：
- 期刊论文
- 发表刊物：
- Energy Storage Materials
- 收录刊物：
- SCI
- 所属单位：
- School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
- 学科门类：
- 工学
- 一级学科：
- 材料科学与工程
- 文献类型：
- J
- 卷号：
- 43
- 页面范围：
- 53-61
- DOI码：
- 10.1016/j.ensm.2021.08.028
- 发表时间：
- 2021-10-14
- 影响因子：
- 17.789
- 摘要：
- Surface modification of high voltage cathodes can enhance the electrochemical performance of solid-state batteries (SSBs) employing sulfide electrolytes. LiNbO3-coating is a common method, however, the role and potential of such coating on the high-nickel cathode is still under-discovered especially during extended cycling at different rates in wide temperature ranges. Herein, we carry out in-depth study of LiNbO 3 coating enabled chlorine-rich argyrodite-based SSBs using LiNi 0.7 Co 0.1 Mn 0.2 O 2 (NCM712) cathode at various C-rate (0.1, 0.5, and 1 C) and wide temperatures (-20 °C, 25 °C (RT), and 60 °C). The LNO@NCM712 electrode delivers initial discharge capacities of 80.9 and 138.9 mAh/g at 5 C under RT and 60 °C respectively with better capacity retentions of 87.5% and 88% after 600 and 300 cycles than that of the NCM712 electrode. Moreover, the LNO@NCM712 electrode also shows better electrochemical behavior than the pristine electrode under deep-freezing temperature (-20 °C). The improved battery performance of the LNO@NCM712 electrode is supported by the resistance changes between the cathode and solid electrolyte revealed by EIS and the structural evolution of active materials unraveled by TEM. This study offers a deep insight into the influence of the modification layer for the performance of SSBs and guidance of design strategy for cathode modification.