Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-08-01

Journal: JOURNAL OF POWER SOURCES

Included Journals: Scopus、EI、SCIE

Volume: 259

Page Number: 54-64

ISSN: 0378-7753

Key Words: Microbial fuel cell; Microbial electrolysis cell; Self-driven; Cobalt leaching; Co(II) reduction; Lithium cobalt oxide

Abstract: Complete cobalt recovery from lithium cobalt oxide requires to firstly leach cobalt from particles LiCoO2 and then recover cobalt from aqueous Co(II). A self-driven microbial fuel cell (MFC) microbial electrolysis cell (MEC) system can completely carry out these two processes, in which Co(II) is firstly released from particles LiCoO2 on the cathodes of MFCs and then reduced on the cathodes of MECs which are powered by the cobalt leaching MFCs. A cobalt leaching rate of 46 +/- 2 mg L-1 h(-1) with yield of 1.5 +/- 0.1 g Co g(-1) COD (MFCs) and a Co(II) reduction rate of 7 +/- 0 mg L-1 h(-1) with yield of 0.8 +/- 0.0 g Co g(-1) COD (MECs), as well as a overall system cobalt yield of 0.15 +/- 0.01 g Co g(-1) Co can be achieved in this self-driven MFC MEC system. Coulombic efficiencies reach 41 +/- 1% (anodic MFCs), 75 +/- 0% (anodic MECs), 100 +/- 2% (cathodic MFCs), and 29 +/- 1% (cathodic MECs) whereas overall system efficiency averages 34 +/- 1%. These results provide a new process of linking MFCs to MECs for complete recovery of cobalt and recycle of spent lithium ion batteries with no external energy consumption.(C) 2014 Elsevier B.V. All rights reserved.