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Journal Article
Improvement of Lithium-Ion Battery Performance at Low Temperature by Adopting Polydimethylsiloxane-Based Electrolyte Additives
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- Authors
- Kwang Man Kim, Nguyen Vu Ly, Jung Ha Won, Young-Gi Lee, Won Il Cho, Jang Myoun Ko, Richard B. Kaner
- Issue Date
- 2014-08
- Citation
- Electrochimica Acta, v.136, pp.182-188
- ISSN
- 0013-4686
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Project Code
- 13SB1100, Development of integrated flexible film battery system, Kim Kwang Man
- Abstract
- 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.
- KSP Keywords
- Carbon monoxide(CO), Electrolyte solution, Ion batteries, Liquid electrolyte, Low temperature(LT), Rate Capability, battery performance, capacity retention, electrolyte additive, ethylene oxide(Oligo), ionic Conductivity