期刊
JOURNAL OF POWER SOURCES
卷 195, 期 18, 页码 6088-6094出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2009.11.098
关键词
Polymer electrolytes; Electrospinning; Blend/composite membranes; Polyacrylonitrile; Poly(vinylidene fluoride-co-hexafluoropropylene)
资金
- National Research Foundation of Korea [핵06A1303, 핵C6B1307] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Apart from PEO based solid polymer electrolytes, tailor-made gel polymer electrolytes based on blend/composite membranes of poly(vinylidene fluoride-co-hexafluoropropylene) and polyacrylonitrile are prepared by electrospinning using 14 wt% polymer solution in dimethylformamide. The membranes show uniform morphology with an average fiber diameter of 320-490 nm, high porosity and electrolyte uptake. Polymer electrolytes are prepared by soaking the electrospun membranes in 1 M lithium hexafluorophosphate in ethylene carbonate/dimethyl carbonate. Temperature dependent ionic conductivity and their electrochemical performance are studied. The blend/composite polymer electrolytes show good ionic conductivity in the range of 10(-3) S cm(-1) at ambient temperature and good electrochemical performance. All the Polymer electrolytes show an anodic stability >4.6V with stable interfacial resistance with storage time. The prototype cell shows good charge-discharge properties and stable cycle performance with comparable capacity fade compared to liquid electrolyte under the test conditions. (C) 2009 Elsevier B.V. All rights reserved.
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