通过亚临界甲醇去除聚乙烯化物粘合剂,以有效地从离子电池中释放阴极材料
Chenyu Chen1, Yikai Min1, Qin Wang1
1State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China.
Waste management (New York, N.Y.)
|November 24, 2024
概括
亚临界甲醇提取有效地从废旧的离子电池中去除聚乙烯化物 (PVDF) 粘合剂,回收阴极材料并使潜在的粘合剂重复使用. 这种方法为电池回收提供了一个环保的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 聚乙烯化物 (PVDF) 粘合剂的去除对于回收使用过的离子电池 (LIB) 的有价值材料至关重要.
- 有效的粘合剂去除有助于回收阴极材料和片.
研究的目的:
- 开发一种新且环保的方法,使用次临界甲醇提取从LIB阴极材料中去除PVDF粘合剂.
- 优化提取条件并研究正极材料释放的机制.
- 描述回收的正极材料,,和提取的PVDF的潜在重复使用.
主要方法:
- 使用次临界甲醇提取方法,从已耗尽的LIB阴极板中去除PVDF粘合剂.
- 进行了提取温度 (200°C) 和时间 (10分钟) 的优化.
- 鉴定技术被用来分析回收的阴极材料,片和PVDF.
主要成果:
- 实现了98.51%的脱皮效率,将阴极材料释放为粉末而无损.
- PVDF去除效率达到了78.74%的重量,同时保持了LiMn2O4.4的晶体结构.
- 恢复的PVDF (R-PVDF) 与原始粘合剂相比,具有类似的热性能,但与原始粘合剂相比,形态和结晶性发生了变化.
结论:
- 亚临界甲醇提取是一种有效的方法,用于从已耗尽的LIB中回收阴极材料和PVDF.
- 回收的PVDF显示了在新的LIB应用中作为粘合剂的再利用潜力.
- 本研究提出了一种有效和可持续的离子电池回收利用方法.
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