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<p>Tin sulfide composites have been extensively studied because of their high specific capacity and good chemical properties. However, their performance is limited by poor electrical conductivity and volume expansion effects. In this study, CNT-modified SnS composites were synthesized via a step solvothermal method, adjusting the doping of CNTs. Phase analysis confirmed the successful synthesis of the material. The results show that SnS@CNTs-100 has the most uniform morphological distribution and the most stable structure, making it most conducive to ion transport and maintaining structural stability during long-term cycling. The electrochemical performance results show that SnS@CNTs-100 has a high capacity in the initial charge-discharge (1220.8 mAh&#xa0;g<sup>−1</sup>) and can still maintain 385 mAh&#xa0;g<sup>−1</sup> after 100 cycles; after 500 cycles, it has 178.2 mAh&#xa0;g<sup>−1</sup> demonstrating good cycling stability. These results indicate that the addition of an appropriate amount of CNTs can effectively retard the volume expansion effect of SnS and improve the electrical conductivity of SnS@CNT composites.</p>

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Research on the Sodium Storage Performance of SnS@CNT as Anode Materials for Sodium-Ion Batteries

  • 期刊论文

  • 发表日期：

    2026年5月11日

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  • Qian Li,
  • Zizhao Wang,
  • Wuming Zhang,
  • Shuoran Wang,
  • Lili Gao,
  • Xihong He,
  • Jinjing Du,
  • Aiping Peng,
  • Yaqing Weng

摘要

Tin sulfide composites have been extensively studied because of their high specific capacity and good chemical properties. However, their performance is limited by poor electrical conductivity and volume expansion effects. In this study, CNT-modified SnS composites were synthesized via a step solvothermal method, adjusting the doping of CNTs. Phase analysis confirmed the successful synthesis of the material. The results show that SnS@CNTs-100 has the most uniform morphological distribution and the most stable structure, making it most conducive to ion transport and maintaining structural stability during long-term cycling. The electrochemical performance results show that SnS@CNTs-100 has a high capacity in the initial charge-discharge (1220.8 mAh g−1) and can still maintain 385 mAh g−1 after 100 cycles; after 500 cycles, it has 178.2 mAh g−1 demonstrating good cycling stability. These results indicate that the addition of an appropriate amount of CNTs can effectively retard the volume expansion effect of SnS and improve the electrical conductivity of SnS@CNT composites.