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Solid Solution Metal Chalcogenides for Sodium‐Ion Batteries: The Recent Advances as Anodes

Wentao Deng, Jun Chen, Li Yang, Xinxing Liang, Shouyi Yin, Xinglan Deng, Guoqiang Zou, Hongshuai Hou,
Published: 9 July 2021
 in Small

Abstract: The sodium-ion battery (SIB) has attracted ever growing attention as a promising alternative of the lithium-ion battery (LIB). Constructing appropriate anode materials is critical for speeding up the application of SIB. This review aims at guiding anode design from the material's perspective, and specifically focusing on solid solution metal chalcogenide anode. The sodium ion storage mechanisms of a solid solution metal chalcogenide anode is overviewed on basis of the elements it is composed of, and discusses how the solid solution character alters the electrochemical performances through diffusion and surface-controlled processes. In addition, by classifying solid solution metal chalcogenide as cation and anion, their recent applications are updated, and understanding the roles of guest elements in improving the electrochemical behaviors of a solid solution metal chalcogenide is carried out. After that, discussion of possible strategies to further optimize these anode materials in the future, flowing from crystal structure design to morphology control and finally to the intimacy improvement between conductive matrix and solid solution metal chalcogenide are also provided.
Keywords: anion solid solution / anodes / cation solid solution / sodium ion batteries / solid solution metal chalcogenides

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