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Activating a Multielectron Reaction of NASICON-Structured Cathodes toward High Energy Density for Sodium-Ion Batteries

Authors
Chen, MingzheHua, WeiboXiao, JinZhang, JiliangLau, Vincent Wing-heiPark, MihuiLee, Gi-HyeokLee, SuwonWang, WanlinPeng, JianFang, LiangZhou, LiminChang, Chung-KaiYamauchi, YusukeChou, ShuleiKang, Yong-Mook
Issue Date
3-11월-2021
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.143, no.43, pp.18091 - 18102
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume
143
Number
43
Start Page
18091
End Page
18102
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/135768
DOI
10.1021/jacs.1c06727
ISSN
0002-7863
Abstract
The increasing demand to efficiently store and utilize the electricity from renewable energy resources in a sustainable way has boosted the request for sodium-ion battery technology due to the high abundance of sodium sources worldwide. Na superionic conductor (NASICON) structured cathodes with a robust polyanionic framework have been intriguing because of their open 3D structure and superior thermal stability. The ever-increasing demand for higher energy densities with NASICON-structured cathodes motivates us to activate multielectron reactions, thus utilizing the third sodium ion toward higher voltage and larger capacity, both of which have been the bottlenecks for commercializing sodium-ion batteries. A doping strategy with Cr inspired by first-principles calculations enables the activation of multielectron redox reactions of the redox couples V2+/V3+, V3+/V4+, and V4+/V5+, resulting in remarkably improved energy density even in comparison to the layer structured oxides and Prussian blue analogues. This work also comprehensively clarifies the role of the Cr dopant during sodium storage and the valence electron transition process of both V and Cr. Our findings highlight the importance of a broadly applicable doping strategy for achieving multielectron reactions of NASICON-type cathodes with higher energy densities in sodium-ion batteries.
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공과대학 (신소재공학부)
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