期刊
CHEMELECTROCHEM
卷 4, 期 1, 页码 56-65出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201600297
关键词
electrochemistry; interfaces; lithium; oxidation; surface chemistry
资金
- IT RAMP
- D program of the Ministry of Trade, Industry AMP
- Energy/Korea Evaluation Institute of Industrial Technology (MOTIE/KEIT) [10046306]
- National Research Foundation of Korea Grant - Korean Government (MEST) [NRF-2013-C1AAA001-0030538]
Lithium difluoro(bisoxalato)phosphate (LiDFBP) is introduced as a novel lithium-salt-type electrolyte additive for lithium-rich cathodes in lithium-ion batteries. The investigation reveals that LiDFBP is oxidized to form a uniform and electrochemically stable solid electrolyte interphase (SEI) on the lithium-rich cathode. The LiDFBP-derived SEI layer effectively suppresses severe electrolyte decomposition at high voltages and mitigates the voltage decay of the lithium-rich cathodes caused by undesirable phase transformation to spinel-like phases during cycling. Furthermore, the cell with electrolyte containing LiDFBP achieves substantially improved cycling performance and delivers a high discharge capacity of 116mAhg(-1) at a high C rate (20C). The unique function of the LiDFBP additive on the surface chemistry of lithium-rich cathodes is confirmed through X-ray photoelectron spectroscopy, SEM, and TEM analyses.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据