Synthesis and electrochemical performances of LiCoO2 recycled from the incisors bound of Li-ion batteries

• Published in: Rare metals 2009-08, Vol.28 (4), p.328-332
• Main Authors: Li, Jinhui, Zhong, Shengwen, Xiong, Daoling, Chen, Hao
• Format: Article
• Language: English
• Subjects: Biomaterials; Chemistry and Materials Science; Energy; Materials Engineering; Materials Science; Metallic Materials; Nanoscale Science and Technology; Physical Chemistry
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-009-0064-9

A new LiCoO 2 recovery technology for Li-ion batteries was studied in this paper. LiCoO 2 was peeled from the Al foil with dimethyl acetamide (DMAC), and then polyvinylidene fluoride (PVDF) and carbon powders in the active material were eliminated by high temperature calcining. Subsequently, Li 2 CO 3 , LiOH·H 2 O and LiAc·2H 2 O were added into the recycled powders to adjust the Li/Co molar ratio to 1.00. The new LiCoO 2 was obtained by calcining the mixture at 850°C for 12 h in air. The structure and morphology of the recycled powders and resulting samples were studied by XRD and SEM techniques, respectively. The layered structure of LiCoO 2 synthesized by adding Li 2 CO 3 is the best, and it is found to have the best characteristics as a cathode material in terms of charge-discharge capacity and cycling performance. The first discharge capacity is 160 mAh·g −1 between 3.0–4.3 V. The discharge capacity after cycling for 50 times is still 145.2 mAh·g −1 .