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In situ construction of heterostructured bimetallic sulfide/phosphide with rich interfaces for high-performance aqueous Zn-ion batteries

Yang, F; Shen, Y; Cen, Z; Wan, J; Li, S; He, G; Hu, J; (2022) In situ construction of heterostructured bimetallic sulfide/phosphide with rich interfaces for high-performance aqueous Zn-ion batteries. Science China Materials , 65 pp. 356-363. 10.1007/s40843-021-1739-0. Green open access

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He_In situ construction of heterostructured bimetallic sulfide:phosphide with rich interfaces for high-performance aqueous Zn-ion batteries_AAM.pdf - Accepted Version

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Abstract

It is still challenging to develop suitable cathode structures for high-rate and stable aqueous Zn-ion batteries. Herein, a phosphating-assisted interfacial engineering strategy is designed for the controllable conversion of NiCo_{2}S_{4} nanosheets into heterostructured NiCoP/NiCo_{2}S_{4} as the cathodes in aqueous Zn-ion batteries. The multicomponent heterostructures with rich interfaces can not only improve the electrical conductivity but also enhance the diffusion pathways for Zn-ion storage. As expected, the NiCoP/NiCo_{2}S_{4} electrode has high performance with a large specific capacity of 251.1 mA h g^{−1} at a high current density of 10 A g^{−1} and excellent rate capability (retaining about 76% even at 50 A g^{−1}). Accordingly, the Zn-ion battery using NiCoP/NiCo_{2}S_{4} as the cathode delivers a high specific capacity (265.1 mA h g^{−1} at 5A g^{−1}), a long-term cycling stability (96.9% retention after 5000 cycles), and a competitive energy density (444.7 W h kg^{−1} at the power density of 8.4 kW kg^{−1}). This work therefore provides a simple phosphating-assisted interfacial engineering strategy to construct heterostructured electrode materials with rich interfaces for the development of high-performance energy storage devices in the future.

Type: Article
Title: In situ construction of heterostructured bimetallic sulfide/phosphide with rich interfaces for high-performance aqueous Zn-ion batteries
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s40843-021-1739-0
Publisher version: https://doi.org/10.1007/s40843-021-1739-0
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: NiCoP/NiCo_{2}S_{4}, Zn-ion batteries, high capacity
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10140265
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