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Citation: CUI Wen-Yu, AN Mao-Zhong, YANG Pei-Xia. Preparation of an Ionic Liquid Gel Polymer Electrolyte and Its Compatibility with a LiFePO₄ Cathode[J]. Acta Physico-Chimica Sinica, ;2010, 26(05): 1233-1238. doi: 10.3866/PKU.WHXB20100530 shu

Preparation of an Ionic Liquid Gel Polymer Electrolyte and Its Compatibility with a LiFePO₄ Cathode

1.
School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, P. R. China

Received Date: 14 October 2009
Available Online: 6 April 2010

An ionic liquid gel polymer electrolyte (ILGPE) based on 1-ethyl-3-methyl-imidazoliumhexafluorophosphate (EMIPF6), poly(vinylidenefluoride-hexafluoropropylene) (P(VDF-HFP) and LiPF6 was prepared by a solution casting method. Its ion transport characteristics and compatibility with LiFePO4 were investigated by cyclic voltammetry (CV), chronoamperometry, galvanostatic charge-discharge and electrochemical impedance spectroscopy (EIS). The results show that the ionic conductivity and electrochemical window at room temperature are 1.650×10-3 S·cm-1 and 5.0 V, respectively. The lithiation/delithiation reversibility was improved because of the formation of a passivation layer on the surface of the electrode during the charge-discharge cycles.
- Lithium-ion battery,
- Ionic liquid gel polymer electrolyte,
- EMIPF6,
- Cathode materials,
- Compatibility
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沈阳化工大学材料科学与工程学院沈阳 110142

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Preparation of an Ionic Liquid Gel Polymer Electrolyte and Its Compatibility with a LiFePO4 Cathode

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Preparation of an Ionic Liquid Gel Polymer Electrolyte and Its Compatibility with a LiFePO₄ Cathode