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Ternary molybdenum sulfoselenide based hybrid nanotubes boost potassium-ion diffusion kinetics for high energy/power hybrid capacitors

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Abstract

Ternary MoS2−xSex/carbon hybrid nanotubes (denoted as MoS2−xSex/C-HNTs) with a unique disordered layer structure and expanded interplanar spacing were synthesized through a facile two-step method involving oxidative polymerization coating and subsequent thermal annealing treatment using an Sb2S3 nanowire template, and they delivered excellent K+ storage performance. The higher diffusion coefficient, excellent structural robustness and disordered layer structure could be the possible reasons for the enhanced performance with a high capacity of 237.0 mA h g−1 after 300 cycles at 0.5 A g−1, which is supported by ex situ XRD, Raman spectroscopy and GITT measurements. Importantly, the prominent performance of a potassium-ion hybrid capacitor (KIHC) based on the MoS2/3Se4/3/C-HNT anode and a commercial activated carbon (AC) cathode demonstrates its great potential for future practical applications.

Graphical abstract: Ternary molybdenum sulfoselenide based hybrid nanotubes boost potassium-ion diffusion kinetics for high energy/power hybrid capacitors

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Article information


Submitted
14 Feb 2020
Accepted
30 Jun 2020
First published
30 Jun 2020

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

Ternary molybdenum sulfoselenide based hybrid nanotubes boost potassium-ion diffusion kinetics for high energy/power hybrid capacitors

J. Gao, G. Wang, Y. Liu, J. Li, B. Peng, S. Jiao, S. Zeng and G. Zhang, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/D0TA01786H

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