Efficient and environmentally friendly separation and recycling of cathode materials and current collectors for lithium-ion batteries by fast Joule heating

doi:10.1016/j.jallcom.2024.174446

	Efficient and environmentally friendly separation and recycling of cathode materials and current collectors for lithium-ion batteries by fast Joule heating
	Li, Chengxiang 1; Kou, Pengfei 1; Wen, Hong 1; Zhou, Yan1,2 ; Gao, Xuzhao 1; Mi, Yan 1
	2024-06-30
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	990
摘要	Spent Li-ion batteries(LIBs) cathodes possess high recycling value. To improve subsequent recovery efficiency and product purity, separating the cathode materials from the aluminum foil is critical. However, traditional separation methods are characterized by high energy consumption, low recycling efficiency, and environmental pollution. This research presents a novel method that involves injecting Joule heat directly into the aluminum foil in the air, resulting in the melting and slight thermal decomposition of the PVDF binder, which reduces its adhesive properties. Owing to the difference in thermal expansion coefficients between the binder and aluminum foil, an instantaneous thermal stress was generated at the interface of the cathode materials and aluminum foil, resulting in a peeling force. This method enabled a rapid and efficient separation of lithium iron phosphate (LFP) and ternary Li-ion (NCM) battery cathode materials. The optimal separation conditions, separation mechanism, and properties of the recovered products were investigated thoroughly using high-speed camera imaging, temperature rise calculations, and microscopic characterization. This chemical-free method avoids the generation of wastewater and gas emissions. Under optimal experimental parameters, the separation efficiency and purity of cathode material reached 99 % and 99.7 %, respectively. Additionally, this method preserves both the structural integrity of the aluminum foil and the crystalline structure of the cathode materials, offering a new pathway for sustainable recycling of end-of-life LIBs. © 2024 Elsevier B.V.
关键词	Cathodes Electric current collectors Energy utilization High speed cameras Ions Iron compounds Joule heating Lithium compounds Recycling Cathode currents Cathodes material Current-collector Environmentally friendly Fast joule heating Joules heating Products purity Recovery efficiency Recycling Spent lithium-ion batteries
DOI	10.1016/j.jallcom.2024.174446
收录类别	EI
语种	英语
出版者	Elsevier Ltd
EI入藏号	20241515891791
原始文献类型	Journal article (JA)
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.cqcet.edu.cn/handle/39TD4454/18362
专题	电子与物联网学院
作者单位	1.School of Electrical Engineering, Chongqing University, Chongqing; 400030, China; 2.School of Electronics and IoT, Chongqing College of Electronic Engineering, Chongqing; 401331, China
推荐引用方式 GB/T 7714	Li, Chengxiang,Kou, Pengfei,Wen, Hong,et al. Efficient and environmentally friendly separation and recycling of cathode materials and current collectors for lithium-ion batteries by fast Joule heating[J]. Journal of Alloys and Compounds,2024,990.
APA	Li, Chengxiang,Kou, Pengfei,Wen, Hong,Zhou, Yan,Gao, Xuzhao,&Mi, Yan.(2024).Efficient and environmentally friendly separation and recycling of cathode materials and current collectors for lithium-ion batteries by fast Joule heating.Journal of Alloys and Compounds,990.
MLA	Li, Chengxiang,et al."Efficient and environmentally friendly separation and recycling of cathode materials and current collectors for lithium-ion batteries by fast Joule heating".Journal of Alloys and Compounds 990(2024).