title: Copper catalysis for enhancement of cobalt leaching and acid utilization efficiency in microbial fuel cells.
abstract: Enhancement of both cobalt leaching from LiCoO2 and acid utilization efficiency (AUE) in microbial fuel cells (MFCs) was successfully achieved by the addition of Cu(II). A dosage of 10mg/L Cu(II) improved both cobalt leaching up to 308% and AUE of 171% compared to the controls with no presence of Cu(II). The apparent activation energy of cobalt leaching catalyzed by Cu(II) in MFCs was only 11.8 kJ/mol. These results demonstrate cobalt leaching in MFCs using Cu(II) as a catalyst may be an effective strategy for cobalt recovery and recycle of spent Li-ion batteries, and the evidence of influence factors including solid/liquid ratio, temperature, and pH and solution conductivity can contribute to improving understanding of and optimizing cobalt leaching catalyzed by Cu(II) in MFCs.
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Yaxuan
authors.initials: Y
authors.lastname: Liu
authors.forename: Jingya
authors.initials: J
authors.lastname: Shen
authors.forename: Liping
authors.initials: L
authors.lastname: Huang
authors.forename: Dan
authors.initials: D
authors.lastname: Wu
mesh_terms: D000143:Acids / Q000737:chemistry*; D001674:Bioelectric Energy Sources; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D056951:Photoelectron Spectroscopy; D013696:Temperature
chemical_list: D000143:Acids; D003035:Cobalt; D003300:Copper
keywords: Acid utilization efficiency; Apparent activation energy; Cobalt leaching; Copper catalysis; Microbial fuel cell