Journal
ELECTROCHIMICA ACTA
Volume 89, Issue -, Pages 359-364Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.11.083
Keywords
Gel polymer electrolyte; In situ chemical cross-linking; Ionic liquid; Lithium polymer cell; Thermal stability
Categories
Funding
- Fundamental R&D Program for Core Technology of Materials
- Ministry of Knowledge Economy, Korea
- National Research Foundation (NRF) of Korea Grant
- Korea government (MEST) [NRF-2009-C1AAA001-0093307]
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Ionic liquid-based cross-linked gel polymer electrolytes were prepared with a phosphazene-based cross-linking agent, and their electrochemical properties were investigated. Lithium polymer cells composed of lithium anode and LiCoO2 cathode were assembled with ionic liquid-based cross-linked gel polymer electrolyte and their cycling performance was evaluated. The interfacial adhesion between the electrodes and the electrolyte by in situ chemical cross-linking resulted in stable capacity retention of the cell. A reduction in the ionic mobility in both the electrolyte and the electrode adversely affected discharge capacity and high rate performance of the cell. DSC studies demonstrated that the use of ionic liquid-based cross-linked gel polymer electrolytes provided a significant improvement in the thermal stability of the cell. (C) 2012 Elsevier Ltd. All rights reserved.
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