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A polymer-supported electrolyte-affinity hybrid membrane and modification of the amphiphilic block copolymer for use as a super-high flexible and high-performance supercapacitor

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Abstract

In this study, a super-high flexible membrane electrode (FME) was developed via a facile method based on liquid–liquid phase separation involving the migration and self-assembly of the components. Note that the surface segregation and chain orientation of the amphiphilic block copolymer PAA-b-PAN-b-PAA on the membrane surface during the phase separation process provide the hierarchical porous structure and electrolyte-affinity electrode surface; this hierarchical porous structure provides pathways for the electrolyte ions into and from the electrolyte/solution interface for further contact and reaction of the electrochemically active materials with the electrolyte ions. In a three-electrode system, the specific capacitance of FME-Ni(OH)2 can reach up to 2198.6 F g−1 (769.5 C g−1) at the current density of 0.5 A g−1 from 0 to 0.35 V as compared to that for non-flexible Ni(OH)2 (1588.6 F g−1; 556.0 C g−1). Moreover, a flexible asymmetric supercapacitor with FME-Ni(OH)2 as the positive electrode and FME-AC (commercial activated carbon) as the negative electrode showed the high specific capacitance of 102.2 F g−1 (163.5 C g−1) and the maximum energy density of 36.3 W h kg−1 at the power density of 400 W kg−1; moreover, it retained the energy density of 20.6 W h kg−1 at the high power density of 4000 W kg−1 in the potential window ranging from 0 to 1.6 V in a 6 M KOH aqueous solution.

Graphical abstract: A polymer-supported electrolyte-affinity hybrid membrane and modification of the amphiphilic block copolymer for use as a super-high flexible and high-performance supercapacitor

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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, Advance Article
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    A polymer-supported electrolyte-affinity hybrid membrane and modification of the amphiphilic block copolymer for use as a super-high 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, Advance Article , DOI: 10.1039/C7SE00076F

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