TY  - JOUR
PY  - 2023//
TI  - Stable operation of lithium metal batteries with aggressive cathode chemistries at 4.9 V
JO  - Angewandte Chemie (International ed. in English)
A1  - Piao, Zhihong
A1  - Ren, Hong-Rui
A1  - Lu, Gongxun
A1  - Jia, Kai
A1  - Tan, Junyang
A1  - Wu, Xinru
A1  - Zhuang, Zhaofeng
A1  - Han, Zhiyuan
A1  - Li, Chuang
A1  - Gao, Runhua
A1  - Tao, Xinyong
A1  - Zhou, Guangmin
A1  - Cheng, Hui-Ming
SP  - ePub
EP  - ePub
VL  - ePub
IS  - ePub
N2  - High-voltage lithium metal batteries (LMBs) pose severe challenges for the matching of electrolytes with aggressive electrodes, especially at low temperatures. Here, we report a rational modification of the Li+ solvation structure to extend the voltage and temperature operating ranges of conventional electrolytes. Ion-ion and ion-dipole interactions as well as the electrochemical window of solvents were tailored to improve oxidation stability and de-solvation kinetics of the electrolyte. Meanwhile, robust and elastic B and F-rich interphases are formed on both electrodes. Such optimization enables Li||LiNi0.5Mn1.5O4 cells (90.2% retention after 400 cycles) and Li||LiNi0.6Co0.2Mn0.2O2 (NCM622) cells (74.0% retention after 200 cycles) to cycle stably at an ultra-high voltage of 4.9 V. Moreover, NCM622 cells deliver a considerable capacity of 143.5 mAh/g at -20 ℃, showing great potential for practical uses. The proposed strategy sheds light on further optimization for high-voltage LMBs.<p />  <p>Language: en</p>
LA  - en
SN  - 1433-7851
UR  - http://dx.doi.org/10.1002/anie.202300966
ID  - ref1
ER  -