A novel polyacrylonitrile-based porous structure gel polymer electrolyte composited by incorporating polyhedral oligomeric silsesquioxane by phase inversion method

作者：Liu, Bo; Huang, Yun; Cao, Haijun^*; Zhao, Lei; Huang, Yixuan; Song, Amin; Lin, Yuanhua; Wang, Mingshan; Li, Xing

来源：Journal of Solid State Electrochemistry, 2018, 22(6): 1771-1783.

DOI：10.1007/s10008-017-3877-8

• Polyacrylonitrile
• Polyhedral oligomeric silsesquioxane
• Gel polymer electrolyte
• Phase inversion method
• Homogeneous pore distribution

A novel polyhedral oligomeric silsesquioxane (POSS) composite polyacrylonitrile (PAN)-based porous structure gel polymer electrolyte (GPE) is prepared by phase inversion method. The POSS additive filler is firstly obtained in the dehydration condensation reaction of vinyltrimethoxysilane (VTMS) and 3-methacryloxypropyltrimethoxysilane (MPTMS). The composition and structure of synthetic POSS and the prepared POSS composite PAN-based GPEs are investigated. It is found that compared with pure PAN-based GPE, the POSS composite PAN-based GPE with 8 wt.% POSS presents the homogeneous pore distribution and abundant electrolyte uptake (540.4 wt.%), which endows GPE-8% with the excellent comprehensive performances: the highest ionic conductivity of 2.62 x 10(-3) S cm(-1) at room temperature, the higher lithium ion transference number of 0.38, the good compatibility with lithium anode, and the higher electrochemical stability window of 5.7 V (vs. Li/Li+). At 0.2 C, the GPE-8%-based lithium ion battery produces a satisfactory discharge capacity of 140 mAh g(-1).

• 出版日期2018-6
• 单位中国医学科学院北京协和医院; 北京协和医学院; 西南石油大学