Journal
ELECTROCHIMICA ACTA
Volume 111, Issue -, Pages 674-679Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.08.048
Keywords
Composite polymer electrolytes; Dispersibility; Nano-titania; Li-ion battery
Categories
Funding
- MOST [2011CB935902, 2013CB934000, 2010DFA72760, 2011CB711202, 2013AA050903, 2011AA11A257, 2011AA11A254]
- China Postdoctoral Science Foundation [2013M530599]
- Tsinghua University Initiative Scientific Research Program [2010THZ08116, 2011THZ08139, 2011THZ01004, 2012THZ08129]
- State Key Laboratory of Automotive Safety and Energy [ZZ2012-011]
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The presented contribution aims at investigating the role of nano-TiO2 dispersibility in affecting the performance of PVDF-HFP based composite polymer electrolytes (CPEs) for Li-ion cells. Four types of polymer electrolytes containing pristine PVDF-HFP gel polymer electrolyte (GPE), PVDF-HFP/nano-TiO2 CPE, PVDF-HFP/nano-TiO2-PMMA CPE and PVDF-HFP/high-dispersed nano-TiO2-PMMA CPE membranes are obtained by phase inversion. The effect of nano-TiO2 dispersibility on performances of PVDF-HFP based CPEs in terms of ionic conductivity, C-rate and cycling performance is investigated. The results demonstrate that the dispersibility of nano-TiO2 is a key factor to affect the performance of PVDF-HFP based CPEs, and the improvement of the dispersibility of nano-TiO2 can remarkably enhance the electrochemical performances of cells assembled with the corresponding CPEs. (C) 2013 Elsevier Ltd. All rights reserved.
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