Trimethoxymethylsilane as a solid-electrolyte interphases improver for graphite anode

Title
Trimethoxymethylsilane as a solid-electrolyte interphases improver for graphite anode
Authors
오시형Min Ji SeongSang Gil ParkHyungjun KimShanmugam ManivannanKyuwon KimTaeeun Yim
Keywords
trimethoxymethylsilane; solid-electrolyte interphases; graphite
Issue Date
2021-06
Publisher
Current applied physics
Citation
VOL 26-77
Abstract
To improve the cycling performance of graphite anode materials, we propose a functional electrolyte additive, trimethoxymethylsilane (TMSi), which contains a silyl ether functional group as part of its molecular structure. First principal calculation studies, in addition to ex situ analyses, demonstrated that electrochemical reduction of ethylene carbonate (EC) gives an anionic reduced EC product. Subsequent chemical reaction with TMSi then generates solid-electrolyte interphase (SEI) layers of Si?O and Si?C functionalized carbonate on the surface of the graphite anode, which prolongs and stabilizes the cycling performance of the cells. As a result, the cell cycled with TMSi-controlled electrolyte exhibits a cycling retention of 89.5%, whereas the cell cycled with standard electrolyte suffers from poor cycling retention (84.3%) after 100 cycles.
URI
http://pubs.kist.re.kr/handle/201004/73118
ISSN
1567-1739
Appears in Collections:
KIST Publication > Article
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