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학술지 Improvement of Lithium-Ion Battery Performance at Low Temperature by Adopting Polydimethylsiloxane-Based Electrolyte Additives
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저자
김광만, Nguyen Vu Ly, 원정하, 이영기, 조원일, 고장면, Richard B. Kaner
발행일
201408
출처
Electrochimica Acta, v.136, pp.182-188
ISSN
0013-4686
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.electacta.2014.05.054
협약과제
13SB1100, 통합형 플랙서블 필름 전지 시스템 개발, 김광만
초록
Three kinds of polydimethylsiloxane (PDMS)-based grafted and ungrafted copolymers such as poly[dimethylsiloxane-co-(siloxane-g-acrylate)] (PDMS-A), poly(dimethylsiloxane-co-phenylsiloxane) (PDMS-P), and poly[dimethylsiloxane-co- (siloxane-g-ethylene oxide)] (PDMS-EO) are used as additives to standard liquid electrolyte solutions to enhance the lithium-ion battery performance at low temperatures. Liquid electrolyte solutions with PDMS-based additives are electrochemically stable under 5.0 V and have adequate ionic conductivities of 10-4 S cm-1 at -20 °C. Particularly, liquid electrolytes with PDMS-P and PDMS-EO exhibit higher ionic conductivities of around 5 × 10-4 S cm-1 at -20 °C, indicating a specific resisting property against the freezing of the liquid electrolyte components. As a result, the addition of PDMS-based additives to liquid electrolytes improves the capacity retention ratio and rate-capability of lithium-ion batteries at low temperatures. © 2014 Elsevier Ltd.
키워드
Electrolyte additives, Keywords, Lithium-ion battery, Low-temperature behavior, Polydimethylsiloxane
KSP 제안 키워드
Carbon monoxide(CO), Electrolyte solution, Ion batteries, Liquid electrolyte, Low temperature(LT), Rate Capability, Temperature behavior, battery performance, capacity retention, electrolyte additive, ethylene oxide(Oligo)