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Fabrication of a 3D Hierarchical Sandwich Co9S8/α‐MnS@N–C@MoS2 Nanowire Architectures as Advanced Electrode Material for High Performance Hybrid Supercapacitors

Fabrication of a 3D Hierarchical Sandwich Co9S8/α‐MnS@N–C@MoS2 Nanowire Architectures as Advanced... Supercapacitors suffer from lack of energy density and impulse the energy density limit, so a new class of hybrid electrode materials with promising architectures is strongly desirable. Here, the rational design of a 3D hierarchical sandwich Co9S8/α‐MnS@N–C@MoS2 nanowire architecture is achieved during the hydrothermal sulphurization reaction by the conversion of binary mesoporous metal oxide core to corresponding individual metal sulphides core along with the formation of outer metal sulphide shell at the same time. Benefiting from the 3D hierarchical sandwich architecture, Co9S8/α‐MnS@N–C@MoS2 electrode exhibits enhanced electrochemical performance with high specific capacity/capacitance of 306 mA h g−1/1938 F g−1 at 1 A g−1, and excellent cycling stability with a specific capacity retention of 86.9% after 10 000 cycles at 10 A g−1. Moreover, the fabricated asymmetric supercapacitor device using Co9S8/α‐MnS@N–C@MoS2 as the positive electrode and nitrogen doped graphene as the negative electrode demonstrates high energy density of 64.2 Wh kg−1 at 729.2 W kg−1, and a promising energy density of 23.5 Wh kg−1 is still attained at a high power density of 11 300 W kg−1. The hybrid electrode with 3D hierarchical sandwich architecture promotes enhanced energy density with excellent cyclic stability for energy storage. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Small Wiley

Fabrication of a 3D Hierarchical Sandwich Co9S8/α‐MnS@N–C@MoS2 Nanowire Architectures as Advanced Electrode Material for High Performance Hybrid Supercapacitors

Kandula, Syam; Shrestha, Khem Raj; Kim, Nam Hoon; Lee, Joong Hee
Small , Volume 14 (23) – Jan 1, 2018
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15 pages

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Publisher
Wiley
Copyright
© 2018 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
1613-6810
eISSN
1613-6829
DOI
10.1002/smll.201800291
Publisher site
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Abstract

Supercapacitors suffer from lack of energy density and impulse the energy density limit, so a new class of hybrid electrode materials with promising architectures is strongly desirable. Here, the rational design of a 3D hierarchical sandwich Co9S8/α‐MnS@N–C@MoS2 nanowire architecture is achieved during the hydrothermal sulphurization reaction by the conversion of binary mesoporous metal oxide core to corresponding individual metal sulphides core along with the formation of outer metal sulphide shell at the same time. Benefiting from the 3D hierarchical sandwich architecture, Co9S8/α‐MnS@N–C@MoS2 electrode exhibits enhanced electrochemical performance with high specific capacity/capacitance of 306 mA h g−1/1938 F g−1 at 1 A g−1, and excellent cycling stability with a specific capacity retention of 86.9% after 10 000 cycles at 10 A g−1. Moreover, the fabricated asymmetric supercapacitor device using Co9S8/α‐MnS@N–C@MoS2 as the positive electrode and nitrogen doped graphene as the negative electrode demonstrates high energy density of 64.2 Wh kg−1 at 729.2 W kg−1, and a promising energy density of 23.5 Wh kg−1 is still attained at a high power density of 11 300 W kg−1. The hybrid electrode with 3D hierarchical sandwich architecture promotes enhanced energy density with excellent cyclic stability for energy storage.

Journal

Small – Wiley

Published: Jan 1, 2018

Keywords: ; ; ; ;

References