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Poly(Ionic Liquid)-Derived Graphitic Nanoporous Carbon Membrane Enables Superior Supercapacitive Energy Storage
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). Huazhong University of Science and Technology, China; Clarkson University, United States.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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Number of Authors: 92019 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 13, no 9, p. 10261-10271Article in journal (Refereed) Published
Abstract [en]

High energy/power density, capacitance, and long-life cycles are urgently demanded for energy storage electrodes. Porous carbons as benchmark commercial electrode materials are underscored by their (electro)chemical stability and wide accessibility, yet are often constrained by moderate performances associated with their powdery status. Here via controlled vacuum pyrolysis of a poly(ionic liquid) membrane template, advantageous features including good conductivity (132 S cm(-1) at 298 K), interconnected hierarchical pores, large specific surface area (1501 m(2) g(-1)), and heteroatom doping are realized in a single carbon membrane electrode. The structure synergy at multiple length scales enables large areal capacitances both for a basic aqueous electrolyte (3.1 F cm(-2)) and for a symmetric all-solid-state supercapacitor (1.0 F cm(-2)), together with superior energy densities (1.72 and 0.14 mW h cm(-2), respectively) without employing a current collector. In addition, theoretical calculations verify a synergistic heteroatom co-doping effect beneficial to the supercapacitive performance. This membrane electrode is scalable and compatible for device fabrication, highlighting the great promise of a poly(ionic liquid) for designing graphitic nanoporous carbon membranes in advanced energy storage.

Place, publisher, year, edition, pages
2019. Vol. 13, no 9, p. 10261-10271
Keywords [en]
poly(ionic liquid)s, carbon membranes, superior areal capacitance, high energy density, hierarchical nanoporosity
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-174936DOI: 10.1021/acsnano.9b03514ISI: 000487859600045PubMedID: 31509375OAI: oai:DiVA.org:su-174936DiVA, id: diva2:1368509
Available from: 2019-11-07 Created: 2019-11-07 Last updated: 2020-01-30Bibliographically approved

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Zhang, WeiyiWang, Yong-LeiZhang, MiaoWang, HongYuan, Jiayin
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