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Three‐Component Functional Additive in a LiPF 6 ‐Based Carbonate Electrolyte for a High‐Voltage LiCoO 2 /Graphite Battery System
Author(s) -
Pang Chunguang,
Xu Gaojie,
An Weizhong,
Ding Guoliang,
Liu Xiaochen,
Chai Jingchao,
Ma Jun,
Liu Haisheng,
Cui Guanglei
Publication year - 2017
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201700118
Subject(s) - electrolyte , battery (electricity) , graphite , carbonate , lithium (medication) , chemical engineering , diethyl carbonate , component (thermodynamics) , lithium ion battery , electrode , materials science , electrochemistry , boron , lithium battery , chemistry , inorganic chemistry , ion , organic chemistry , ethylene carbonate , ionic bonding , power (physics) , physics , engineering , thermodynamics , medicine , quantum mechanics , endocrinology
The effectiveness of multicomponent functional additives on the performances of lithium ion batteries has received increasing attention. Tris(2 H ‐hexafluoroisopropyl) borate (THFPB) additive can totally suppress the appearance of a crystallized complex between LiPF 6 and adiponitrile (ADN). Herein, ADN, THFPB, and cyclohexylbenzene are demonstrated to be an effective three‐component functional additive in LiPF 6 ‐based carbonate electrolyte that improves the cyclability and rate capabilities of LiCoO 2 /graphite full cells charged to 4.4, 4.45, and 4.5 V, respectively. By systematic characterization, it is demonstrated rationally that, with the help of the three‐component functional additive, the electrolyte is stabilized and new types of less resistant, thinner, more protective solid–electrolyte interfaces are constructed simultaneously on the surfaces of both electrodes.