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Supersaturated bridge-sulfur and vanadium co-doped MoS₂ nanosheet arrays with enhanced sodium storage capability

Dong, Y; Zhu, Z; Hu, Y; He, G; Sun, Y; Cheng, Q; Parkin, IP; (2021) Supersaturated bridge-sulfur and vanadium co-doped MoS₂ nanosheet arrays with enhanced sodium storage capability. Nano Research , 14 pp. 74-80. 10.1007/s12274-020-3044-x.

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Abstract

The low specific capacity and sluggish electrochemical reaction kinetics greatly block the development of sodium-ion batteries (SIBs). New high-performance electrode materials will enhance development and are urgently required for SIBs. Herein, we report the preparation of supersaturated bridge-sulfur and vanadium co-doped MoS2 nanosheet arrays on carbon cloth (denoted as V-MoS2+x/CC). The bridge-sulfur in MoS2 has been created as a new active site for greater Na+ storage. The vanadium doping increases the density of carriers and facilitates accelerated electron transfer. The synergistic dual-doping effects endow the V-MoS2+x/CC anodes with high sodium storage performance. The optimized V-MoS2.49/CC gives superhigh capacities of 370 and 214 mAh·g−1 at 0.1 and 10 A·g−1 within 0.4−3.0 V, respectively. After cycling 3,000 times at 2 A·g−1, almost 83% of the reversible capacity is maintained. The findings indicate that the electrochemical performances of metal sulfides can be further improved by edge-engineering and lattice-doping co-modification concept.

Type: Article
Title: Supersaturated bridge-sulfur and vanadium co-doped MoS₂ nanosheet arrays with enhanced sodium storage capability
DOI: 10.1007/s12274-020-3044-x
Publisher version: https://doi.org/10.1007/s12274-020-3044-x
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: MoS2, bridge-sulfur, high specific capacity, sodium-ion battery, cycle life
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10117784
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