Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Bioresour Technol. 2013 Jan;128:539-46. doi: 10.1016/j.biortech.2012.11.011. Epub 2012 Nov 12.
Cobalt leaching from lithium cobalt oxide is a promising reduction process for recovery of cobalt and recycle of spent lithium ion batteries, but suffers from consumption of large amount of reductants and energy, and generation of excess secondary polluted sludge. Thus, effective and environmental friendly processes are needed to improve the existing process limitations. Here we reported microbial fuel cells (MFCs) to effectively reduce Co(III) in lithium cobalt oxide with concomitant energy generation. There was a synergetic interaction in MFCs, leading to a more rapid Co(III) leaching at a rate 3.4 times the sum of rates by conventional chemical processes and no-acid controls. External resistor, solid/liquid ratio, solution conductivity, pH and temperature affected system performance. This study provides a new process for recovery of cobalt and recycle of spent lithium ion batteries with concomitant energy generation from MFCs.
钴从锂钴氧化物中的浸出是一种很有前途的回收钴和再循环利用废旧锂离子电池的还原过程，但该过程会消耗大量的还原剂和能源，并产生过多的二次污染污泥。因此，需要有效的环保工艺来改善现有工艺的局限性。在这里，我们报告了微生物燃料电池（MFC）可有效地将钴（III）还原为锂钴氧化物，并同时产生能量。在 MFC 中存在协同作用，导致 Co(III)的浸出速率比传统化学过程和无酸控制的速率之和快 3.4 倍。外部电阻、固液比、溶液电导率、pH 值和温度都会影响系统性能。本研究为从 MFC 中回收钴和再循环利用废旧锂离子电池并同时产生能量提供了一种新工艺。
