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Dynamic Mechanism of Gas-Solid Chlorination Process for Spent Lithium Iron Phosphate Cathode Material
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Hongbing LIU1, Yizhi XIONG2, Xiaoping ZHOU2, Tao CHEN3, Hui YANG4, Jiexi WANG5, Jie CHEN6, Weisai LIU2
Mining and Metallurgical Engineering | 2026, 46(3) : 244 - 250
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Mining and Metallurgical Engineering | 2026, 46(3): 244-250
• MATERIALS •
Dynamic Mechanism of Gas-Solid Chlorination Process for Spent Lithium Iron Phosphate Cathode Material
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Hongbing LIU1, Yizhi XIONG2, Xiaoping ZHOU2, Tao CHEN3, Hui YANG4, Jiexi WANG5, Jie CHEN6, Weisai LIU2
Affiliations
  • 1.National Engineering Research Center of Advanced Energy Storage Materials (Shenzhen) Co., Ltd., Shenzhen 518063, Guangdong, China
  • 2.National Engineering Research Center of Advanced Energy Storage Masterials Co., Ltd., Changsha 410205, Hunan, China
  • 3.Hunan Yuneng New Energy Battery Material Co., Ltd., Xiangtan 411202, Hunan, China
  • 4.Yifeng Jinfeng Lithium Industry Co., Ltd., Yichun 336300, Jiangxi, China
  • 5.School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
  • 6.Hunan Zhiyuan New Materials Co., Ltd., Changsha 410205, Hunan, China
doi: 10.3969/j.issn.0253-6099.2026.03.037
Outline
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A processing technique of gas-solid chlorination combined with water leaching was adopted for systematically investigating the phase evolution of spent lithium iron phosphate (LFP) cathode material during recycling, and the dynamic mechanism of lithium extraction via gas-solid chlorination of spent LFP cathode material was also clarified. It is found that the chlorination reaction of spent cathode material can proceed spontaneously in thermodynamics, and lithium can be converted into water-soluble phases through the gas-solid chlorination process. Under the optimized conditions of gas-solid chlorination, including reaction temperature of 150 ℃ and reaction time of 156 min, LiFePO4 is almost completely transformed into FePO4 and LiCl by water leaching, presenting a leaching rate of lithium at 99.09%, while the leaching rates of iron, phosphorus and aluminum just 0.089%, 0.078% and 0.339%, respectively. This process actualizes efficient and highly selective leaching of lithium. Meanwhile, the crystal structure and morphology of FePO4 are well maintained during chlorination and water leaching, providing a stable precursor for the subsequent solid-phase synthesis and regeneration of lithium iron phosphate.

spent LiFePO4  /  cathode material  /  chlorination  /  gas-solid reaction  /  selective leaching  /  recycling of spent battery  /  battery regeneration  /  iron phosphate  /  lithium  /  lithium chloride
刘宏兵, 熊轶智, 周小平, 陈涛, 杨晖, 王接喜, 陈杰, 刘维赛. 废旧磷酸铁锂正极材料气固氯化过程的动态机制研究. 矿冶工程杂志, 2026 , 46 (3) : 244 -250 . DOI: 10.3969/j.issn.0253-6099.2026.03.037
Hongbing LIU, Yizhi XIONG, Xiaoping ZHOU, Tao CHEN, Hui YANG, Jiexi WANG, Jie CHEN, Weisai LIU. Dynamic Mechanism of Gas-Solid Chlorination Process for Spent Lithium Iron Phosphate Cathode Material[J]. Mining and Metallurgical Engineering, 2026 , 46 (3) : 244 -250 . DOI: 10.3969/j.issn.0253-6099.2026.03.037
Appendix
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Year 2026 volume 46 Issue 3
133
38
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Article Info
doi: 10.3969/j.issn.0253-6099.2026.03.037
  • Receive Date：2025-12-01
  • Online Date：2026-10-08
Article Data
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  • Received：2025-12-01
Funding
Affiliations
    1.National Engineering Research Center of Advanced Energy Storage Materials (Shenzhen) Co., Ltd., Shenzhen 518063, Guangdong, China
    2.National Engineering Research Center of Advanced Energy Storage Masterials Co., Ltd., Changsha 410205, Hunan, China
    3.Hunan Yuneng New Energy Battery Material Co., Ltd., Xiangtan 411202, Hunan, China
    4.Yifeng Jinfeng Lithium Industry Co., Ltd., Yichun 336300, Jiangxi, China
    5.School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
    6.Hunan Zhiyuan New Materials Co., Ltd., Changsha 410205, Hunan, China
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https://castjournals.cast.org.cn/joweb/kygczz/EN/10.3969/j.issn.0253-6099.2026.03.037
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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