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Title: Bilateral interfaces in In₂Se₃-CoIn₂-CoSe₂ heterostructures for high-rate reversible sodium storage
Authors: Xiao, Shuhao
Li, Xinyan
Zhang, Wensi
Xiang, Yong
Li, Tingshuai
Niu, Xiaobin
Chen, Jun Song
Yan, Qingyu
Keywords: Engineering::Materials::Energy materials
Issue Date: 2021
Source: Xiao, S., Li, X., Zhang, W., Xiang, Y., Li, T., Niu, X., Chen, J. S. & Yan, Q. (2021). Bilateral interfaces in In₂Se₃-CoIn₂-CoSe₂ heterostructures for high-rate reversible sodium storage. ACS Nano, 15(8), 13307-13318.
Project: 2020-T1-001-031
Journal: ACS Nano
Abstract: Metal selenides are considered as a group of promising candidates as the anode material for sodium-ion batteries due to their high theoretical capacity. However, the intrinsically low electrical and ionic conductivities as well as huge volume change during the charge-discharge process give rise to an inferior sodium storage capability, which severely hinders their practical application. Herein, we fabricated In2Se3/CoSe2 hollow nanorods composed of In2Se3/CoIn2/CoSe2 by growing cobalt-based zeolitic imidazolate framework ZIF-67 on the surface of indium-based metal-organic framework MIL-68, followed by in situ gaseous selenization. Because of the CoIn2 alloy phase in between In2Se3 and CoSe2, a heterostructure consisting of two alloy/selenide interfaces has been successfully constructed, offering synergistically enhanced electrical conductivity, Na diffusion process, and structural stability, in comparison to the single CoIn2-free interface with only two metal selenides. As expected, this nanoconstruction delivers a high reversible capacity of 297.5 and 205.5 mAh g-1 at 5 and 10 A g-1 after 2000 cycles, respectively, and a superior rate performance of 371.6 mAh g-1 at even 20 A g-1.
ISSN: 1936-0851
DOI: 10.1021/acsnano.1c03056
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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