The synthesis of a nanocomposite gel polymer electrolytes (NGPEs) using Li+-nctionalized SPEEK (SPEEK(Li)) nanofiber membrane as a matrix, cross-linked PVA as a gelled agent and LiCIO4 as an electrolytic salt for electric double layer capacitors (EDLCs) were reported in this work. Compared with conventional PVA based gel electrolyte, the "SO3-Li" functional groups and the pores structure of the SPEEK (Li) nanofiber membrane improves the ionic conductivity as well as mechanical stability, which made the prepared NGPEs exhibited a high ionic conductivity of 8.9 x 10(-3) S cm(-1) at ambient temperature and a large voltage stability window range from 0 to 2.0 V. The fabricated symmetric EDLCs showed a specific capacitance of 146.96 F g(-1) at a current density of 0.5 A g(-1), with a maximum energy density of 18.26 W h kg(-1). Meanwhile, the EDLCs showed outstanding cyclical stability of 98% specific capacitance retention after 3000 cycles GCD testing, all of these results indicated that the NGPEs should be appropriate to EDLCs and next-generation energy storage systems. (C) 2018 Elsevier Inc. All rights reserved.
[1]Jilin Univ, Minist Educ, Key Lab High Performance Plast, Coll Chem, Changchun 130012, Jilin, Peoples R China.
[2]Jilin Univ, Hosp 2, Dept Hand Surg, Changchun 130041, Jilin, Peoples R China.
[3]Jilin Univ, Hosp 1, Dept Burn Surg, Changchun 130021, Jilin, Peoples R China.
(8.0+极速模式)