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An Electrolyte-Affinity Hybrid Membrane with the Supporting of Polymer and Modification of Amphiphilic Block Copolymer for Superhigh-Flexible and High-Performance Supercapacitor

Abstract

In this paper, a superhigh flexible membrane electrode (FME) was developed by a facile method based on liquid-liquid phase separation involving the migration and self-assembly of the components. It’s particularly significant that the surface segregation and chain orientation of the amphiphilic block copolymer PAA-b-PAN-b-PAA on membrane surface during the phase separation process provided the hierarchical porous structure and electrolyte-affinity electrode surface, which provided pathways for electrolyte ions into and from the electrolyte/solution interface, and further effectively touching and reaction of electrochemical active materials with electrolyte ions. In a three-electrode system, compared to that of 1588.6 F/g for non-flexible Ni(OH)2, the specific capacitance of FME-Ni(OH)2 reached up to 2198.6 F/g at a current density of 0.5 A/g within 0 to 0.35 V. Moreover, a flexible asymmetric supercapacitor by using FME-Ni(OH)2 as the positive electrode and FME-AC (commercial active carbon) as the negative electrode showed a high specific capacitance of 102.2 F/g, maximum energy density of 36.3 Wh/kg at a power density of 400 W/kg, and still remained 20.6 Wh/kg at a high power density of 4000 W/kg in the potential window from 0 to 1.6 V in 6 M KOH aqueous solution.

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Publication details

The article was received on 06 Feb 2017, accepted on 07 Apr 2017 and first published on 10 Apr 2017


Article type: Paper
DOI: 10.1039/C7SE00076F
Citation: Sustainable Energy Fuels, 2017, Accepted Manuscript
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    An Electrolyte-Affinity Hybrid Membrane with the Supporting of Polymer and Modification of Amphiphilic Block Copolymer for Superhigh-Flexible and High-Performance Supercapacitor

    X. Zhao, Y. Yang, J. Wu, Y. Tan, Y. Liu, L. Kong, L. Kang and F. Ran, Sustainable Energy Fuels, 2017, Accepted Manuscript , DOI: 10.1039/C7SE00076F

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