Journal
IONICS
Volume 19, Issue 8, Pages 1099-1103Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-013-0844-y
Keywords
Lithium-ion battery; Propylene carbonate; Additive; Solid electrolyte interphase
Funding
- National Science Foundation of China [50973112]
- Hundred Talents Program of the Chinese Academy of Sciences (CAS)
- CAS-Guangdong Collaboration Program [20108]
- Science & Technology Project of Guangzhou [11A44061500]
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Allyl cyanide (AC) was investigated as a film-forming additive in propylene carbonate (PC)-based electrolytes for graphite anode in lithium-ion batteries. The film-forming behavior of AC was characterized with cyclic voltammetry, electrochemical impedance spectroscopy, scanning electron microscopy, and Fourier transform infrared spectroscopy. By adding 2 wt% AC in the electrolyte of 1 M LiPF6-PC/DMC (1:1, in vol), the exfoliation of graphite anode was effectively suppressed over cycling. Graphite/Li half-cell showed an initial coulombic efficiency of 75 % and a specific capacity of 300 mAh/g after 48 cycles. A possible reductive polymerization mechanism of AC on the surface of graphite was proposed.
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