首页|Preparation and Electrochemical Performance of Nano-Co3O4 Anode Materials from Spent Li-Ion Batteries for Lithium-Ion Batteries

Preparation and Electrochemical Performance of Nano-Co3O4 Anode Materials from Spent Li-Ion Batteries for Lithium-Ion Batteries

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A hydrometallurgical process for the recovery of cobalt oxalate from spent lithium-ion batteries was used to recycle cobalt compound by using alkali leaching,reductive acid leaching and chemical deposition of cobalt oxalate.The recycled cobalt oxalate was used to synthesize nano-Co3O4 anode material by sol-gel method.The samples were characterized by thermal gravity analysis and differential thermal analysis (TGA/DTA),X-ray diffraction (XRD),scanning electron microscopy (SEM) and charge/discharge measurements.The influence of molar ratio of Co2+ to citric acid and calcination temperature on the structure and electrochemical performance of nano-Co3O4 was evaluated.As the molar ratio of Co2+ to citric acid is 1:1,the face-centered cubic (fcc) Co3O4 powder shows the discharge capacity of 760.9 mA h g-1,the high coulombic efficiency of 99.7％ in the first cycle at the current density of 125 mA g-1,and the excellent cycling performance with the reversible capacity of 442.3 mA h g-1 after 20 cycles at the current density of 250 mA g-1.

Spent lithium-ion batteriesSol-gel methodReductive acid leachingNanostructure cobalt oxideElectrochemical behavior

Chuanyue Hu、Jun Guo、Jin Wen、Yangxi Peng

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Department of Chemistry and Materials Science, Hunan Institute of Humanities, Science and Technology, Loudi 417000, China

Planned Science and Technology Project of Hunan Province,ChinaPlanned Science and Technology Project of Hunan Province,ChinaProject Supported by Scientific Research Fund of Hunan Provincial Education Department

2011FJ31602011GK200210B054

2013

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCIEI
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2013.29(3)
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