Scholarlink

<p>Rice husk is used to achieve efficient recovery of critical metals from spent lithium-ion batteries using dilute acid leaching. The occurrence forms and stability patterns of Li, Ni, Co, and Mn at various temperatures are determined using thermodynamic analysis. Fourier transform infrared spectroscopy reveals that rice husk contains big molecular polysaccharides such as cellulose, hemicellulose, and lignin. Hydrolysis of rice husk yields soluble low molecular organic substances, such as glucose and sucrose. X-ray photoelectron spectroscopy studies show the valence states distribution of each metal in the electrode materials throughout the entire recovery process. With 5 mL/g of hydrolysate, all metals in the high valence state can be reduced to +2 valence. The leaching rates of Li, Ni, Co, and Mn all exceeded 97% under the later dilute acid leaching system. The leaching rates are strongly positively correlated with acid consumption and weight loss. During the leaching process, the smooth and flat surfaces of the electrode material are progressively eroded, resulting in smaller particle sizes. Residues with higher leaching rates show only sparse and loose battery negative graphite. Additionally, the role of rice husk in enhancing the efficient leaching of critical metals from lithium-ion batteries is explored.</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

Role of Rice Husk on the Clean Dilute Acid Leaching of Critical Metals from Spent Lithium-Ion Batteries

  • 期刊论文

  • 发表日期：

    2026年5月8日

查看全文
  • Jiafeng Li,
  • Xiaolei He,
  • Guiqing Liu,
  • Fang Wang,
  • Fan Zhang,
  • Changchun Zhou

摘要

Rice husk is used to achieve efficient recovery of critical metals from spent lithium-ion batteries using dilute acid leaching. The occurrence forms and stability patterns of Li, Ni, Co, and Mn at various temperatures are determined using thermodynamic analysis. Fourier transform infrared spectroscopy reveals that rice husk contains big molecular polysaccharides such as cellulose, hemicellulose, and lignin. Hydrolysis of rice husk yields soluble low molecular organic substances, such as glucose and sucrose. X-ray photoelectron spectroscopy studies show the valence states distribution of each metal in the electrode materials throughout the entire recovery process. With 5 mL/g of hydrolysate, all metals in the high valence state can be reduced to +2 valence. The leaching rates of Li, Ni, Co, and Mn all exceeded 97% under the later dilute acid leaching system. The leaching rates are strongly positively correlated with acid consumption and weight loss. During the leaching process, the smooth and flat surfaces of the electrode material are progressively eroded, resulting in smaller particle sizes. Residues with higher leaching rates show only sparse and loose battery negative graphite. Additionally, the role of rice husk in enhancing the efficient leaching of critical metals from lithium-ion batteries is explored.

Graphical Abstract