Facile and scalable synthesis of bismuth oxyhalide nanosheets anodes for fast and durable sodium-ion storage

IF 6.8 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2024-11-18 DOI:10.1007/s40843-024-3175-3

Shenghui Zhou (, ), Zhefei Sun (, ), Zilong Zhuang (, ), Sifan Wen (, ), Haoyu Chen (, ), Quanzhi Yin (, ), Jianhai Pan (, ), Xingqi Chen (, ), Jijian Xu (, ), Qiaobao Zhang (, )

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引用次数: 0

Abstract

Bismuth oxyhalide (BiOCl) holds promising potential as the anode for sodium-ion batteries (SIBs) due to its high theoretical capacity and unique layered structure. However, its practical applications are hindered by challenges such as large volume variations during cycling, the ambiguous Na⁺-storage mechanism, and complex synthesis methods. Here, we present a facile and scalable strategy to fabricate a high-performance BiOCl nanosheets anode for SIBs. Through comprehensive in-situ and ex-situ microscopic characterizations and electrochemical analysis, we reveal that the sodiation/desodiation process of the BiOCl nanosheets anode leads to the formation of metallic Bi and Na₃OCl. The metallic Bi acts as an active material for Na⁺ storage in subsequent cycles, while the formed Na₃OCl enhances the stability of the solid-electrolyte interphase (SEI) layer and facilitates Na⁺ transport. Additionally, the metallic Bi gradually transforms into a nanoporous structure during cycling, improving Na⁺ transport and mitigating volume variations. As a result, the BiOCl nanosheets anode exhibits outstanding electrochemical performance, with impressive rate capability and cycling stability. Furthermore, full cells paired with the Na₃V₂(PO₄)₃ (NVP) cathode and pre-cycled BiOCl nanosheets anode also demonstrate a superior rate and cycling performance. This work offers valuable insight into the development of high-performance anodes for advanced SIBs.

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.