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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 4    August 2006

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Recycle and synthesis of LiCoO2 from incisors bound of Li-ion batteries
LIU Yun-jian(刘云建), HU Qi-yang(胡启阳),
LI Xin-hai(李新海), WANG Zhi-xing(王志兴), GUO Hua-jun(郭华军)

School of Metallurgical Science and Engineering, Central South University,
Changsha 410083, China

Abstract: A new LiCoO2 recovery technology of Li-ion battery was studied. LiCoO2 was initially separated from the Al foil with dimethyl acetamide(DMAC), and then the polyvinylidene fluoride(PVDF) and carbon powders in the active material were eliminated by high temperature calcining. The content of the elements in the recovered powder was analyzed. The structure and morphology of the resulted samples were observed by XRD and SEM. Then the Li2CO3 was added in the recycled powder to adjust the Li/Co molar ratio to 1. The new LiCoO2 was synthesized by calcining at 850 ℃ for 12 h in air. The well-crystallized single phase LiCoO2 without Co3O4 phase was obtained. The recycle-synthesized LiCoO2 powders have good characteristics as a cathode active material in terms of charge-discharge capacity and cycling performance.

 

Key words: Li-ion battery; direct recovery; LiCoO2; synthesis; electrochemical performance

ISSN 1672-7029
CN 43-1423/U

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