通过无氧呼吸通过Shewanella putrefaciens减少NCM阴极的溶解
Seongryeong Kim1, Kyoung Lee2, Kihyun Kim3
1Department of Battery and Chemical Engineering, Changwon National University, Changwon, Gyeongsangnam-do 51140, Republic of Korea.
Environmental science & technology
|October 1, 2024
概括
来自Shewanella putrefaciens的微生物呼吸显著地溶解了离子电池阴极材料. 这项研究揭示了使用过的电池金属的可持续生物化潜力.
科学领域:
- 环境微生物学环境微生物学
- 材料科学是一种材料科学.
- 电化学 电化学 电化学
背景情况:
- 升级使用的离子电池 (LIBs) 导致越来越多的消耗电池.
- 消耗LIBs的环境释放带来了生态风险,对阴极材料影响的数据有限.
- 雪瓦尼拉 (Shewanella putrefaciens) 是一种常见的无氧微生物,在天然的低氧环境中发现.
研究的目的:
- 在无氧条件下研究Shewanella putrefaciens和LiNi0.6Co0.2Mn0.2O2 (NCM622) 阴极材料之间的相互作用.
- 量化微生物无氧呼吸引起的原始和已使用的NCM622溶解.
- 探索LIB阴极材料在环境命运和回收中微生物活动的潜力.
主要方法:
- 在无氧条件下种植Shewanella putrefaciens.
- 在中性pH和室温下用Shewanella putrefaciens化原始和已使用的NCM622.
- 使用适当的分析技术分析金属溶解 (Li,Ni,Co,Mn).
- 描述NCM622表面变化和二次矿化.
主要成果:
- 谢瓦内拉 putrefaciens的无氧呼吸诱导了NCM622的显著溶解:原始材料约为59%,废弃材料约为78%.
- 微生物相互作用导致了Ni,Co和Mn的减少,促进了Li,Ni,Co和Mn在溶液中的释放.
- 在反应NCM622颗粒的表面观察到二次矿化.
结论:
- 微生物无氧呼吸对废弃的LIB阴极材料的环境行为产生重大影响.
- 谢瓦尼拉 (Shewanella putrefaciens) 证明了使用过的LIB阴极中价值金属的可持续生物溶解的潜力.
- 这项研究突出了微生物活动对电池废物的生态影响,并为资源回收提供了途径.
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