Achieving ultrahigh initial Coulombic efficiency in SnBi/C anode for sodium-ion batteries via interfacial engineering and binder optimization

Chunting Wang; Qian Yao; Long Su; Jingjing Dong; Yingchun Yan; Weimin Zhang; Jian Yang

doi:10.1039/D6CC00721J

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Achieving ultrahigh initial Coulombic efficiency in SnBi/C anode for sodium-ion batteries via interfacial engineering and binder optimization

Chunting Wang,^a Qian Yao,^b Long Su,^c Jingjing Dong,^a Yingchun Yan,

*^a Weimin Zhang^a and Jian Yang

*^b

Author affiliations

* Corresponding authors

^a School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255000, P.R. China
E-mail: yingchyan07@163.com

^b Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, P.R. China
E-mail: yangjian@sdu.edu.cn

^c School of Chemistry and Chemical Engineering, Hainan University, Haikou, P.R. China

Abstract

The designed deep-eutectic Sn–Bi bimetallic carbon composite microspheres (SnBi/C) with abundant phase boundaries, effectively alleviate volume deformation during sodium (de)intercalation. Accordingly, the anode fabricated with poly(ethylene oxide) binder delivers an ultrahigh initial Coulombic efficiency of 95.4%, along with high reversible capacity and excellent cycling stability.

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Article information

DOI: https://doi.org/10.1039/D6CC00721J
Article type: Communication
Submitted: 03 Feb 2026
Accepted: 08 Apr 2026
First published: 08 Apr 2026

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Chem. Commun., 2026, Advance Article

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Achieving ultrahigh initial Coulombic efficiency in SnBi/C anode for sodium-ion batteries via interfacial engineering and binder optimization

C. Wang, Q. Yao, L. Su, J. Dong, Y. Yan, W. Zhang and J. Yang, Chem. Commun., 2026, Advance Article , DOI: 10.1039/D6CC00721J

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Achieving ultrahigh initial Coulombic efficiency in SnBi/C anode for sodium-ion batteries via interfacial engineering and binder optimization

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Achieving ultrahigh initial Coulombic efficiency in SnBi/C anode for sodium-ion batteries via interfacial engineering and binder optimization

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