期刊
ELECTROCHIMICA ACTA
卷 230, 期 -, 页码 123-131出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.01.177
关键词
Lithium Polymer Battery; Gel Polymer Electrolyte; Ionic Liquid; Transference Number; Galvanostatic Charging and Discharging
资金
- BRNS-DAE
- DST, New Delhi, India
- UGC, New Delhi, India
Development of high performance lithium polymer batteries (LPBs) with high thermal and electrochemical stabilities is now being intensively pursued for various applications like personal electronics, grid storage etc. In the present study, we report synthesis and characterization of a gel polymer electrolyte (GPE) based on polymer polyethylene oxide (PEO), salt lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) and different amounts of added ionic liquid (IL) 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIMTFSI). Differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), complex impedance spectroscopy, ionic transference number studies, linear sweep voltammetry (LSV) and cyclic voltammetry (CV) studies exhibit promising characteristics of prepared GPEs for suitable application in LPBs. The GPEs show high thermal stability (i.e. no weight loss up to 310 degrees C), high ionic conductivity (similar to 2.08 x 10(-4)Scm(-1) at 30 degrees C), high lithium transference number (t(Li+) = 0.39) and high electrochemical stability window (similar to 4.6 V). A low cost simple thermal lamination technique was used to encapsulate whole LPB assembly by sandwiching best performing GPE between a LiMn2O4 cathode and lithium metal anode. In galvanostatic charge/discharge cycles the prepared cell showed good electrochemical performance. (C) 2017 Elsevier Ltd. All rights reserved.
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