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Novel hierarchical porous carbon prepared by a one-step template route for electric double layer capacitors and Li–Se battery devices

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Abstract

Low-cost hierarchical porous carbon materials with a controllable structure and high specific surface area as well as large pore volume were synthesized by a one-step route involving SnO2@chitosan precursor carbonization and subsequent SnO2 template removal. We found that when HPC CISC-29 is applied as the electrode in the supercapacitor device, it exhibits both high specific capacity (260.4 F g−1) and excellent rate capacitance retention (81.9%) from 0.1 A g−1 to 10 A g−1. CISC-29 shows superiority compared to conventional activated carbons for which specific capacitance and capacitance retention are 100–200 F g−1 and 60–70%, respectively. Solid-state NMR and NLDFT porosity distribution results reveal that the high specific capacitance is most likely associated with the optimized hierarchical porous structure, e.g. rich small-size micropores and their good connection with large-size mesopores. Finally, CISC-29 was complexed with Se to construct a cathode for lithium selenium batteries. Se@CISC-29 shows excellent performance with a specific capacity of 1207.0 mA h g−1 at 0.1 A g−1.

Graphical abstract: Novel hierarchical porous carbon prepared by a one-step template route for electric double layer capacitors and Li–Se battery devices

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Article information


Submitted
16 Dec 2019
Accepted
31 Jan 2020
First published
02 Feb 2020

J. Mater. Chem. A, 2020, Advance Article
Article type
Paper

Novel hierarchical porous carbon prepared by a one-step template route for electric double layer capacitors and Li–Se battery devices

Y. Lei, X. Liang, L. Yang, P. Jiang, Z. Lei, S. Wu and J. Feng, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/C9TA13753J

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