电解质
材料科学
碳酸乙烯酯
储能
热失控
高压
阳极
高能
碳酸盐
化学工程
电池(电)
电化学
电极
电压
工程物理
电气工程
化学
冶金
物理
工程类
物理化学
功率(物理)
量子力学
作者
Yu Wu,Dongsheng Ren,Xiang Liu,Gui‐Liang Xu,Xuning Feng,Yuejiu Zheng,Yalun Li,Min Yang,Yong Peng,Xuebing Han,Li Wang,Zonghai Chen,Yang Ren,Languang Lu,Xiangming He,Jitao Chen,Khalil Amine,Minggao Ouyang
标识
DOI:10.1002/aenm.202102299
摘要
Abstract Serious safety issues are impeding the widespread adoption of high‐energy lithium‐ion batteries for transportation electrification and large‐scale grid storage. Herein, a triple‐salt ethylene carbonate (EC) free electrolyte for high‐safety and high‐energy pouch‐type LiNi 0.8 Mn 0.1 Co 0.1 O 2 |graphite (NMC811|Gr) cells is reported. This EC‐free electrolyte can effectively stabilize the NMC811 surface under high potential (up to 4.5 V), as well as generate a stable interphase to achieve a superior compatibility with the Gr anode. The electrolyte strategy enables significantly enhanced intrinsic safety (trigger temperature of thermal runaway (TR) increased by 67.0 °C), excellent electrochemical properties (4.2V, ≈100% after 200 cycles), and superior high voltage stability (4.5 V, 82.1% after 200 cycles). The work opens up a new avenue for developing novel electrolyte systems to build safer high‐energy batteries for practical applications.
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