从使用过的离子电池中对贵金属进行高效选择性浸出:Na的影响
Qian Hu1, Zhongyan Luo2, Huixiang Zhou1
1College of Chemistry and Chemical Engineering, and Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, Hunan, China.
Waste management (New York, N.Y.)
|June 3, 2023
概括
这项研究引入了一种用于回收离子电池的新方法. 它有效地从使用的电池阴极材料中回收和过渡金属,使用碳热降解和选择性液.
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:
- 使用过的离子电池 (LIB) 由于危险材料而带来了环境挑战.
- 有效的LIB回收对于资源回收和可持续性至关重要.
- 目前的回收方法往往与选择性金属提取和效率相斗争.
研究的目的:
- 开发一种高效率的选择性方法,用于从已耗尽的LIB阴极材料中出 (Li) 并回收过渡金属 (TM).
- 在拟议的回收过程中调查相变换机制.
- 在电池回收中推广绿色化学原则.
主要方法:
- 使用过的LIB阴极材料的碳热减热烤.
- 使用甲硫酸盐 (Na2S2O8) 溶液选择性出.
- 随后,使用没有减少剂的硫酸 (H2SO4) 出TM.
- 热力学分析,X射线衍射 (XRD),X射线光电子光谱 (XPS) 和扫描电子显微镜与能量分散光谱 (SEM-EDS) 进行机制研究.
主要成果:
- 在烤后使用Na2S2O8实现了94.15%的浸效率,具有>99%的选择性.
- 在没有添加减速剂的情况下使用H2SO4的TM中获得了>99%的漏效率.
- Na2S2O8通过破坏烤制品的结构促进了Li出,并通过氧化防止了TM出.
- 详细了解烤和漏过程中的相位转换.
结论:
- 开发的方法可以从废弃的LIB阴极材料中选择性和全面地回收贵金属.
- 该过程与绿色化学原则保持一致,最大限度地减少对环境的影响.
- 这种方法提供了一个有效的途径,以可持续地管理终生LIBs.
关键词:
碳热减热烤方式泄漏 泄漏是一种泄漏.() () () () () () () () () () () () () () () () ) () () () () () () ) () () ) () ) () () () () () () ) () () ) () ) () ) () ) () () () ) () () () () ) () () () () () ) ()使用过的离子电池.有价值的金属 贵重的金属更多相关视频
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