提高离子电池的电化学放电,以确保安全回收
Neha Garg1, Simo Pekkinen1, Eduardo Martínez González2
1Research group of Energy Conversion and Systems, Department of Mechanical Engineering, School of Engineering, Aalto University PO Box 14400 Aalto FI-00076 Finland neha.garg@aalto.fi.
Sustainable energy & fuels
|June 13, 2024
概括
安全回收离子电池 (LIB) 是至关重要的. 一种新的Fe (ii) -Fe (iii) 电解质可以实现高效的电化学放电,减少与消耗的LIB中剩余能量相关的风险,以实现可持续的资源管理.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 环境科学 环境科学
背景情况:
- 在电子产品和电动汽车中越来越多地使用离子电池 (LIB),需要可持续的回收利用.
- 消耗的LIBs中的剩余能量存在安全风险,例如回收过程中的热失控.
- 目前使用无机盐的电化学放电方法可以产生危险的副产品.
研究的目的:
- 开发一种更安全,更有效的电化学方法,用于排出已消耗的LIBs.
- 为了研究Fe (ii) -Fe (iii) 氧化还原对电解质对LIB放电的有效性.
- 分析影响电化学放电过程的因素,并确定潜在的改进.
主要方法:
- 使用Fe (ii) -Fe (iii) 氧化还原对电解质用于消耗的LIBs的电化学放电.
- 采用定期放电方法来实现深度放电.
- 调查电池外腐蚀和放电期间极点的pH行为.
主要成果:
- 使用Fe(ii) -Fe(iii) 电解质,在反弹后实现了LIBs的高效深度放电到2.0V的安全电压.
- 在放电过程中没有观察到电池外的腐蚀.
- 确定了气体进化在没有对流的情况下发生,并且电池外材料对于放电效率至关重要.
结论:
- 铁二-铁三氧化还原对为消耗的LIB电化学放电提供了一个有希望的,安全和高效的介质.
- 电池外材料的标准化可以进一步提高工业规模LIB回收的效率.
- 解决气体演变和理解材料相互作用是优化这种回收方法的关键.
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