直接再生降解LiFePO4 阴极通过还原性溶液重石化再生过程
Chenchen Li1,2, Rui Gong1,2, Yingjie Zhang1,2
1Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
Molecules (Basel, Switzerland)
|July 27, 2024
概括
回收使用的铁酸盐 (LFP) 电池至关重要. 一种使用亚酸 (AA) 的新热水还原方法有效地再生了LFP阴极材料,恢复了可持续能源存储的电化学特性.
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:
- 对电子产品和电动汽车的日益增长的需求产生了大量的废旧电池废物.
- 资源是有限的,电池的处置带来了重大的环境挑战.
- 迫切需要使用过的离子电池的高效和绿色回收方法.
研究的目的:
- 开发用于使用的铁酸盐 (LFP) 电池的直接再生方法.
- 调查使用亚酸 (AA) 作为水热回收中的环保降解剂.
- 为了评估再生的LFP阴极材料的电化学性能.
主要方法:
- 开发了一种水热还原工艺,用于直接再生废弃的LiFePO4.
- 利用甲酸 (AA) 作为Fe3+的低成本,环保的降解剂.
- 分析了再生阴极材料 (AA-SR-LFP) 的结晶性和电化学特性.
主要成果:
- 水热还原方法成功地产生了具有良好的晶度的AA-SR-LFP.
- 再生后的AA-SR-LFP表现出优异的电化学性能,包括高特异容量.
- 在1°C时达到144.4mAhg-1的初始放电特定容量,在100个循环后保持98.6%.
结论:
- 水热还原直接再生方法有效地修复了消耗的LiFePO4.4中的缺陷.
- 亚酸在热水过程中起着关键作用,增强材料性能.
- 这种方法为回收使用的LiFePO4阴极材料提供了一种绿色和高效的方法.
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