Scholarlink

<p>The acid leaching of spent lithium-ion batteries generates black mass-leached graphite slag (BMLGS), a low-value byproduct with limited utilization. This study presents an innovative approach to upcycling acid-washed and dried BMLGS into highly conductive graphitized cathode carbon blocks for aluminum production, addressing environmental and resource efficiency concerns in battery recycling. Experimental results show that BMLGS facilitates the ordered crystallization of graphite during high-temperature treatment, significantly increasing the graphitization degree. Cathode blocks with 40&#xa0;wt.% BMLGS achieve a graphitization of 97.39–2.69% higher than those using only calcined petroleum coke—a key factor for enhancing cathode longevity and energy efficiency in aluminum electrolysis. BMLGS also improves compatibility with binder pitch, enhancing the composite’s bonding performance. With increasing BMLGS content, the graphitized cathode carbon blocks exhibit elevated apparent density (from 1.67 to 1.73&#xa0;g/cm<sup>3</sup>), higher elastic modulus (8.3–10.9&#xa0;GPa), and improved thermal conductivity (119–131&#xa0;W/(m·K)). This work demonstrates a viable strategy for transforming low-value battery waste into high-performance industrial materials, contributing to sustainable resource valorization.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study on the Preparation of Graphitized Cathode Carbon Blocks for Aluminum from Graphite Slag Leached by Black Mass

  • 期刊论文

  • 发表日期：

    2026年2月10日

查看全文
  • Mingzhuang Xie,
  • Yadong Qiao,
  • Guoqing Yu,
  • Han Lv,
  • Xiangjun Zhang,
  • Hongliang Zhao,
  • Fengqin Liu

摘要

The acid leaching of spent lithium-ion batteries generates black mass-leached graphite slag (BMLGS), a low-value byproduct with limited utilization. This study presents an innovative approach to upcycling acid-washed and dried BMLGS into highly conductive graphitized cathode carbon blocks for aluminum production, addressing environmental and resource efficiency concerns in battery recycling. Experimental results show that BMLGS facilitates the ordered crystallization of graphite during high-temperature treatment, significantly increasing the graphitization degree. Cathode blocks with 40 wt.% BMLGS achieve a graphitization of 97.39–2.69% higher than those using only calcined petroleum coke—a key factor for enhancing cathode longevity and energy efficiency in aluminum electrolysis. BMLGS also improves compatibility with binder pitch, enhancing the composite’s bonding performance. With increasing BMLGS content, the graphitized cathode carbon blocks exhibit elevated apparent density (from 1.67 to 1.73 g/cm3), higher elastic modulus (8.3–10.9 GPa), and improved thermal conductivity (119–131 W/(m·K)). This work demonstrates a viable strategy for transforming low-value battery waste into high-performance industrial materials, contributing to sustainable resource valorization.

Graphical Abstract