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<p>A gradient thermal reduction approach was employed to facilitate the large-scale production of high-quality, cost-effective reduced graphene oxide (RGO). The RGO was then combined with carbon nanotubes (CNTs) and carbon black (Super-P) to form a ternary conductive additive system for LiFePO<sub>4</sub> (LFP)-based lithium-ion batteries (LIBs). This type of composite significantly enhanced the electrochemical performance of the LIBs. By incorporating RGO along with CNTs and Super-P, a three-dimensional (3D) "point–line–plane" conductive network was successfully constructed. This structure efficiently reduced the charge transfer resistance (Rct = 37.99 Ω) and enhanced the Li<sup>+</sup> diffusion coefficient (D = 7.78 × 10<sup>–13</sup> cm<sup>2</sup>&#xa0;s<sup>−1</sup>). The optimized cathode exhibited remarkable discharge capacity of 163.3 mAh g⁻<sup>1</sup> at 0.1C under room temperature and 95 mAh g⁻<sup>1</sup> at 6C. Moreover, it maintained a high capacity retention rate of 99.6% after 100 cycles at -15&#xa0;°C and 0.3C. This work provides a practical strategy for utilizing large-scale production of RGO for developing high-performance LIBs.</p> Graphical Abstract <p></p>

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Enhanced low-temperature performance of LiFePO4 cathode via large-scale production of reduced graphene oxide-based ternary point-line-plane conductive network

  • 期刊论文

  • 发表日期：

    2025年10月30日

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  • Shaoqiu Wang,
  • Xiaoming Cai,
  • Junwen Tang,
  • Jianwen Su,
  • Aniqa Jadoon,
  • Shuaishuai Fang,
  • Zijian Liu,
  • Jinming Cai

摘要

A gradient thermal reduction approach was employed to facilitate the large-scale production of high-quality, cost-effective reduced graphene oxide (RGO). The RGO was then combined with carbon nanotubes (CNTs) and carbon black (Super-P) to form a ternary conductive additive system for LiFePO4 (LFP)-based lithium-ion batteries (LIBs). This type of composite significantly enhanced the electrochemical performance of the LIBs. By incorporating RGO along with CNTs and Super-P, a three-dimensional (3D) "point–line–plane" conductive network was successfully constructed. This structure efficiently reduced the charge transfer resistance (Rct = 37.99 Ω) and enhanced the Li+ diffusion coefficient (D = 7.78 × 10–13 cm2 s−1). The optimized cathode exhibited remarkable discharge capacity of 163.3 mAh g⁻1 at 0.1C under room temperature and 95 mAh g⁻1 at 6C. Moreover, it maintained a high capacity retention rate of 99.6% after 100 cycles at -15 °C and 0.3C. This work provides a practical strategy for utilizing large-scale production of RGO for developing high-performance LIBs.

Graphical Abstract