Journal
ENERGY TECHNOLOGY
Volume 5, Issue 11, Pages 1979-1989Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.201700118
Keywords
additives; batteries; carbonate electrolytes; high voltage; synergistic effects
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Funding
- CAS-QIBEBT Director Innovation Foundation
- Qingdao Energy Storage Industry Scientific Research
- Chinese Academy of Sciences [XDA09010105]
- National Natural Science Foundation of China [51502319, 21473228]
- Shandong Provincial Natural Science Foundation [ZR2015QZ01, BS2015CL006]
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The effectiveness of multicomponent functional additives on the performances of lithium ion batteries has received increasing attention. Tris(2H-hexafluoroisopropyl) borate (THFPB) additive can totally suppress the appearance of a crystallized complex between LiPF6 and adiponitrile (ADN). Herein, ADN, THFPB, and cyclohexylbenzene are demonstrated to be an effective three-component functional additive in LiPF6-based carbonate electrolyte that improves the cyclability and rate capabilities of LiCoO2/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.
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