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<p>Sodium-ion batteries (SIBs) are regarded as one of the most promising alternatives to lithium-ion batteries (LIBs) due to their advantages, such as abundant sodium resources and low cost. However, no single material has yet proven ideal as a negative electrode material. Transition metal dichalcogenides (TMDs) have been widely studied as negative electrode materials for sodium storage. Therefore, this study selected tin disulfide (SnS<sub>2</sub>) and biomass corn stover carbon to prepare a novel composite material. Sulfuric acid was selected as the activating agent for corn stover. A carbon material with a spherical structure was obtained and served as a matrix for embedding SnS<sub>2</sub>. This composite combines the structural stability of the carbon framework with the high electrochemical performance of SnS<sub>2</sub>. Through electrochemical performance testing, the feasibility of this material can be further validated. After 100 cycles at a current density of 0.2&#xa0;C, the discharge specific capacity remains at 442.4&#xa0;mA h g<sup>− 1</sup>. After 1,000 cycles at a current density of 2&#xa0;C, the discharge specific capacity remains at 222.5&#xa0;mA h g<sup>− 1</sup>.</p>

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Construction and mechanism study of sodium-ion battery anode material based on the synergistic effect between tin disulfide and biomass-derived carbon

  • 期刊论文

  • 发表日期：

    2026年2月7日

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  • Kaifeng Yu,
  • Jie Song,
  • Ce Liang,
  • Shuang Gao,
  • Yi Li

摘要

Sodium-ion batteries (SIBs) are regarded as one of the most promising alternatives to lithium-ion batteries (LIBs) due to their advantages, such as abundant sodium resources and low cost. However, no single material has yet proven ideal as a negative electrode material. Transition metal dichalcogenides (TMDs) have been widely studied as negative electrode materials for sodium storage. Therefore, this study selected tin disulfide (SnS2) and biomass corn stover carbon to prepare a novel composite material. Sulfuric acid was selected as the activating agent for corn stover. A carbon material with a spherical structure was obtained and served as a matrix for embedding SnS2. This composite combines the structural stability of the carbon framework with the high electrochemical performance of SnS2. Through electrochemical performance testing, the feasibility of this material can be further validated. After 100 cycles at a current density of 0.2 C, the discharge specific capacity remains at 442.4 mA h g− 1. After 1,000 cycles at a current density of 2 C, the discharge specific capacity remains at 222.5 mA h g− 1.