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<p>Conductive carbon black is widely used in the cathodes and anodes of batteries to enhance the conductivity of electrode active materials. However, it occupies a significant proportion of the electrode material while offering extremely limited specific capacity. As a result, endowing conductive carbon black with higher specific capacity while maintaining its conductivity is an ideal strategy for enhancing electrochemical performance. In this study, we developed a simple and scalable method to successfully synthesize conductive acetylene black with high specific capacity. Its initial discharge capacity reached 414.66 mAh/g, and a reversible capacity of 92.12 mAh/g was maintained at a current density of 2 A/g, significantly outperforming the sodium-ion storage performance of conventional Super P carbon black. Furthermore, the conductivity of the acetylene black-based anode slurry showed almost no change before and after acid treatment, with only a slight difference of 250 μS/cm compared to Super P.</p>

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Functionalized acetylene black-conductive additive for rechargeable sodium-ion batteries

  • 期刊论文

  • 发表日期：

    2025年4月25日

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  • Weiyue Zheng,
  • Yi Tang,
  • Kejia Yang,
  • Jiali Li,
  • Linhao Qi,
  • Chenxi Yue,
  • HuaYu Chen,
  • Jian Chen

摘要

Conductive carbon black is widely used in the cathodes and anodes of batteries to enhance the conductivity of electrode active materials. However, it occupies a significant proportion of the electrode material while offering extremely limited specific capacity. As a result, endowing conductive carbon black with higher specific capacity while maintaining its conductivity is an ideal strategy for enhancing electrochemical performance. In this study, we developed a simple and scalable method to successfully synthesize conductive acetylene black with high specific capacity. Its initial discharge capacity reached 414.66 mAh/g, and a reversible capacity of 92.12 mAh/g was maintained at a current density of 2 A/g, significantly outperforming the sodium-ion storage performance of conventional Super P carbon black. Furthermore, the conductivity of the acetylene black-based anode slurry showed almost no change before and after acid treatment, with only a slight difference of 250 μS/cm compared to Super P.