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Performance enhancement of gel polymer electrolytes using sulfonated poly(ether ether ketone) for supercapacitors
Author(s) -
Li Guoqiang,
Yang He,
Zuo Danying,
Zhang Hongwei
Publication year - 2021
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.6182
Subject(s) - supercapacitor , materials science , polymer , electrolyte , chemical engineering , ether , ultimate tensile strength , ionic conductivity , acrylic acid , peek , polymer chemistry , capacitance , composite material , organic chemistry , chemistry , electrode , copolymer , engineering
Gel polymer electrolytes (GPEs) with reasonable mechanical properties are highly favorable for flexible/stretchable solid‐state supercapacitors. However, the widely explored poly(acrylic acid) (PAA)‐based GPEs provide unsatisfactory mechanical performance. Herein, a useful strategy is adopted to improve the performance of PAA‐based GPEs by incorporating sulfonated poly(ether ether ketone) (SPEEK) chains. The optimum SPEEK‐enhanced PAA GPE shows an ionic conductivity of 100 ± 1.57 mS cm −1 , ultimate tensile strength of 4.2 ± 0.24 kPa and elongation at break of 858%, which are larger than those of the plain PAA GPE. A supercapacitor developed using such a SPEEK‐enhanced GPE also delivers higher specific capacitance, larger energy density and comparable cycling stability compared to a supercapacitor using a PAA GPE. This work suggests that rigid ionic polymers are suitable for improving the performance of GPEs with inferior mechanical properties. © 2021 Society of Chemical Industry