Biotreatment for the spent lithium-ion battery in a three-module integrated microbial-fuel-cell recycling system
Biotreatment for the spent lithium-ion battery in a three-module integrated microbial-fuel-cell recycling system
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DOI：
10.1016/j.wasman.2021.03.029
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发表时间：
2021-04-02
期刊：
影响因子：
8.1
通讯作者：
Zhang, Shuwen
中科院分区：
文献类型：
--
作者：
Huang, Tao;Junjun, Tao;Zhang, Shuwen
组装了一个生物电化学回收平台，在一个集成系统中从废lib的阴极材料中回收Li和Co。BE平台由三个微生物燃料电池子系统组成，包括MFC- a、MFC- b和MFC- c。Co和Li从组装平台的阴极材料中顺利回收。初始pH和LiCoO2的负载比对MFC-A中Li和Co的浸出效率均有显著影响。在初始pH为1、LiCoO2负载比为0.2 g/L的条件下，通过还原LiCoO2可同时释放约45%的Li和93%的Co。厚度为1.5 cm的（NH4）(2) c2o4改性颗粒活性炭（GAC）在MFC-B体系阴极附近良好堆积。在最佳条件下，MFC-B对Co的去除率（RECo1）达到98%，回收率（RECo2）达到96%。Li+的投加浓度低于2 mg/L， （NH4）(2)CO3的投加浓度为0.01 ~ 0.02 M，有利于提高萃余液中Li的回收率，保证了MFC-C具有较高的功率输出和库仑效率。产电微生物在生物膜上持续释放CO2，有利于Li2CO3的沉淀。(C) 2021 Elsevier Ltd版权所有。
A bio-electrochemically (BE) recycling platform was assembled to recover Li and Co from the cathodic materials of spent LIBs in one integrated system. The BE platform consists of three microbial-fuel-cell (MFC) subsystems, including MFC-A, MFC-B, and MFC-C. Co and Li were smoothly recovered from the cathodic materials in the assembled platform. The initial pH and the loading ratios of LiCoO2 both significantly influenced the leaching efficiencies of Li and Co in MFC-A. Approximately 45% Li and 93% Co were simultaneously released through the reduction of LiCoO2 at the initial pH of 1 and the loading ratios of LiCoO2 of 0.2 g/L. The (NH4)(2)C2O4-modified granular activated carbons (GAC) with a thickness of 1.5 cm was favorably stacked adjacent to the cathode of the MFC-B system. About 98% of removal efficiency (RECo1) and 96% of recovery efficiency (RECo2) of Co were achieved in MFC-B under optimum conditions. The dosing concentration of Li+ lower than 2 mg/L and the (NH4)(2)CO3 of 0.01-0.02 M were conducive to enhancing the recovery of Li from raffinate and guaranteed the higher power output and coulombic efficiencies in MFC-C. The continuous release of CO2 caused by exoelectrogenic microorganisms on the biofilm facilitated the precipitation of Li2CO3. (C) 2021 Elsevier Ltd. All rights reserved.