电解质
电化学
锂(药物)
溶剂
电极
乙醚
无机化学
水溶液
材料科学
盐(化学)
化学
化学工程
有机化学
物理化学
内分泌学
工程类
医学
作者
Zheng Li,Harsha Rao,Rasha Atwi,Bhuvaneswari M. Sivakumar,Bharat Gwalani,Scott Gray,Kee Sung Han,Thomas A. Everett,Tanvi A. Ajantiwalay,Vijayakumar Murugesan,Nav Nidhi Rajput,Vilas G. Pol
标识
DOI:10.1038/s41467-023-36647-1
摘要
The electrochemical instability of ether-based electrolyte solutions hinders their practical applications in high-voltage Li metal batteries. To circumvent this issue, here, we propose a dilution strategy to lose the Li+/solvent interaction and use the dilute non-aqueous electrolyte solution in high-voltage lithium metal batteries. We demonstrate that in a non-polar dipropyl ether (DPE)-based electrolyte solution with lithium bis(fluorosulfonyl) imide salt, the decomposition order of solvated species can be adjusted to promote the Li+/salt-derived anion clusters decomposition over free ether solvent molecules. This selective mechanism favors the formation of a robust cathode electrolyte interphase (CEI) and a solvent-deficient electric double-layer structure at the positive electrode interface. When the DPE-based electrolyte is tested in combination with a Li metal negative electrode (50 μm thick) and a LiNi0.8Co0.1Mn0.1O2-based positive electrode (3.3 mAh/cm2) in pouch cell configuration at 25 °C, a specific discharge capacity retention of about 74% after 150 cycles (0.33 and 1 mA/cm2 charge and discharge, respectively) is obtained.
科研通智能强力驱动
Strongly Powered by AbleSci AI