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Issue 9, 2018
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MOF-derived sponge-like hierarchical porous carbon for flexible all-solid-state supercapacitors

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Abstract

Novel three-dimensional (3D) interconnected hierarchical sponge-like porous carbons (PCs) using Zn-based MOFs (Zn(tbip)) with two distinct particle sizes as precursors were prepared via a one-step pyrolysis process. The size effect of the precursor on the porous architecture has been evaluated in detail. The porous carbon derived from small-sized Zn(tbip) at 900 °C (denoted as C-S-900) possesses a hierarchical porous structure with the highest specific surface area (1356 m2 g−1), which benefits ion immersion and retention. C-S-900 demonstrates an ultrahigh specific capacitance of 369 and 226 F g−1 at 10 and 400 mV s−1 in a 6 mol L−1 KOH electrolyte, respectively. In addition, a symmetric flexible all-solid-state supercapacitor device was assembled with the electrode of C-S-900 and PVA/KOH gel electrolyte. The device can offer 96% capacity after 2000 stretching–bending cycles and operate micro-electronic devices displaying excellent mechanical robustness and cycling stability. The present work explored the relationship between the size effect of MOF precursors and the porous carbon architectures to optimize the performance of supercapacitors.

Graphical abstract: MOF-derived sponge-like hierarchical porous carbon for flexible all-solid-state supercapacitors

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Publication details

The article was received on 08 Jun 2018, accepted on 10 Jul 2018 and first published on 17 Jul 2018


Article type: Research Article
DOI: 10.1039/C8QM00284C
Citation: Mater. Chem. Front., 2018,2, 1692-1699

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    MOF-derived sponge-like hierarchical porous carbon for flexible all-solid-state supercapacitors

    X. Cao, Z. Sun, S. Zhao, B. Wang and Z. Han, Mater. Chem. Front., 2018, 2, 1692
    DOI: 10.1039/C8QM00284C

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