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废旧离子电池电解质的转化和命运在两阶段热处理过程中

Li-Jun Wu¹, Fu-Shen Zhang¹, Zhi-Yuan Zhang¹

¹Department of Solid Waste Treatment and Recycling, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.

Waste management (New York, N.Y.)

|July 5, 2024

概括

一个新的两阶段热工艺有效地处理废离子电池 (LIB) 中的有毒电解质. 该方法将危险组件转化为稳定的残留物,减少与电池回收相关的环境风险.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
化学工程是化学工程的重要组成部分.

背景情况:

废弃的离子电池 (LIB) 电解质的处置存在重大环境和安全挑战,原因是高毒性和缺乏成熟的处理方法.
越来越多的LIB应用需要可持续和有效的战略来管理剩余的电解质废物.

研究的目的:

开发和研究一种新的两阶段热工艺,用于处理已耗尽的LIBs的剩余电解质.
阐明酸和有机物在热处理过程中的转化,分布和迁移机制.
评估添加对和酸盐固定和总体残留稳定性的影响.

主要方法:

一个两阶段的热过程,涉及低温旋转蒸,随后是热解.
研究电解质转化,包括 (KOH/Ca(OH) 在和酸盐固定中的作用.
热解气体,油成分和残留物稳定性的分析.

主要成果:

低温蒸稳定了六酸,同时从碳酸和中形成Li2CO3.
在300°C的热解产生了气体 (CO2,CO,CH4,H2) 和易燃油,将和酸盐转化为稳定的化和酸盐.
添加将六酸转化为化物和酸,提高了残留物的稳定性并减少了含气体的腐蚀.

结论:

开发的两阶段热工艺提供了一种可行的和有效的方法来管理废物LIBs中的危险残留电解质.
这种方法显著减少了与LIB废物电解质处理相关的环境风险和潜在腐蚀.
这项研究是迈向更安全,更可持续的离子电池回收利用的关键一步.

关键词:

蒸是蒸的方法之一.热解是一种热解过程.使用过的电解质.两个阶段的热处理.废弃的离子电池废弃物

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