Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Articles
Improvement of Cycle Capability of VS4 by Addition of Phosphorus Element
Yuki UMEMURATomonari TAKEUCHIHikari SAKAEBEHisao KIUCHIToyonari YAJIMisaki KATAYAMA
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2021 Volume 89 Issue 3 Pages 273-278

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Abstract

Vanadium tetrasulfide (VS4) have been attracting attention as the promising positive electrode material for next generation batteries because of its high theoretical capacity (1196 mAh g−1). In this study, a typical element (i.e., Phosphorus) was introduced into VS4 for an attempt to improve the electrochemical cycle performance of VS4. The prepared PxVSy showed significant increase in cycle capability; e.g., ca. 70 % after 50 cycles for P0.4VS5.0 sample cell, being much higher than that of pristine VS4 cell (ca. 10 %). The PDF (pair distribution function) analyses indicated that the structural reversibility of VS4 for Li insertion/extraction reactions was improved by the phosphorus addition.

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© The Author(s) 2021. Published by ECSJ.

This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium provided the original work is properly cited. [DOI: 10.5796/electrochemistry.21-00026].
http://creativecommons.org/licenses/by/4.0/
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