Pyrometallurgical recycling of spent lithium-ion batteries from conventional roasting to synergistic pyrolysis with organic wastes  

作　　者：Chao Pan Yafei Shen 

机构地区：[1]China Energy Science and Technology Research Institute Co.Ltd.,Nanjing 210023,Jiangsu,China [2]Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control(AEMPC),Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,School of Environmental Science and Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,Jiangsu,China

出　　处：《Journal of Energy Chemistry》2023年第10期547-561,I0014,共16页能源化学（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant 2022YFC3701504)。

摘　　要：The synergistic pyrolysis has been increasingly used for recycling spent lithium-ion batteries(LIBs)and organic wastes(hydrogen and carbon sources),which are in-situ transformed into various reducing agents such as H_(2),CO,and char via carbothermal and/or gas thermal reduction.Compared with the conventional roasting methods,this“killing two birds with one stone”strategy can not only reduce the cost and energy consumption,but also realize the valorization of organic wastes.This paper concluded the research progress in synergistic pyrolysis recycling of spent LIBs and organic wastes.On the one hand,valued metals such as Li,Co,Ni,and Mn can be recovered through the pyrolysis of the cathode materials with inherent organic materials(e.g.,separator,electrolyte)or graphite anode.During the pyrolysis process,the organic materials are decomposed into char and gases(e.g.,CO,H_(2),and CH_(4))as reducing agents,while the cathode material is decomposed and then converted into Li_(2)CO_(3) and low-valent transition metals or their oxides via in-situ thermal reduction.The formed Li_(2)CO_(3) can be easily recovered by the water leaching process,while the formed transition metals or their oxides(e.g.,Co,CoO,Ni,MnO,etc.)can be recovered by the reductant-free acid leaching or magnetic separation process.On the other hand,organic wastes(e.g.,biomass,plastics,etc.)as abundant hydrogen and carbon sources can be converted into gas(e.g.,H_(2),CO,etc.)and char via pyrolysis.The cathode materials are decomposed and subsequently reduced by the pyrolysis gas and char.In addition,the pyrolysis oil and gas can be upgraded by catalytic reforming with the active metals derived from cathode material.Finally,great challenges are proposed to promote this promising technology in the industrial applications.

关 键 词：Synergistic pyrolysis Spent LIBs Biomass RECYCLING Reduction roasting 

分 类 号：X705[环境科学与工程—环境工程]