A polymer electrolyte based on poly(vinylidene fluoride-hexafluoropylene)/hydroxypropyl methyl cellulose blending for lithium-ion battery

作者：Ran, Ying; Yin, Zhoulan^*; Ding, Zhiying; Guo, Huajun; Yang, Jing

来源：Ionics, 2013, 19(5): 757-762.

DOI：10.1007/s11581-012-0808-7

• PVDF-HFP
• HPMC
• Gel polymer electrolyte
• Lithium-ion battery

A polymer electrolyte based on the blending of poly(vinylidene fluoride-hexafluoropylene) (PVDF-HFP) and hydroxypropyl methyl cellulose (HPMC) was prepared for the first time. The structure and performance of the gel polymer electrolyte were characterized and measured by X-ray diffraction, Fourier transform infrared, thermogravimetric analysis, scanning electron microscopy, electrochemical impedance spectroscopy, linear sweep voltammetry, and by a charge/discharge test. The results show that the gel polymer electrolyte has the best performance when PVDF-HFP/HPMC ratio (w/w) is 4:1. At room temperature, the ionic conductivity can reach 0.38x10(-3) S cm(-1), the electrochemical stable window is up to 5.0 V (vs. Li/Li+), and the half cell of Li/GPE/LiMn2O4 shows high-discharge-specific capacity and good cycling performance.

• 出版日期2013-5
• 单位中南大学