1. Synthesis of LiCo1/3Ni1/3Mn1/3O2 as a cathode material for lithium ion battery by water-in-oil emulsion method
- Author
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Tang Lian-xing, Lai Qiong-Yu, Tang Aidong, Wei Ni-Ni, Huang Ke-long, Ji Xiao-yang, and Tong Dong-Ge
- Subjects
Non-blocking I/O ,Lithium carbonate ,Kinetics ,Inorganic chemistry ,Condensed Matter Physics ,Electrochemistry ,Lithium-ion battery ,law.invention ,chemistry.chemical_compound ,chemistry ,law ,Emulsion ,General Materials Science ,Calcination ,Fourier transform infrared spectroscopy ,Nuclear chemistry - Abstract
Layered LiCo 1/3 Ni 1/3 Mn 1/3 O 2 was synthesized by a newly developed water-in-oil emulsion method. The synthesis process of LiCo 1/3 Ni 1/3 Mn 1/3 O 2 was investigated by TG/DTA, FTIR and XRD. Li 2 CO 3 , NiO, CoO and Mn 2 O 3 are the intermediate products. With the calcination temperature increasing, Li 2 CO 3 undergoes direct reactions with NiO, CoO and Mn 2 O 3 to form LiCo 1/3 Ni 1/3 Mn 1/3 O 2 . The kinetics of formation of LiCo 1/3 Ni 1/3 Mn 1/3 O 2 by the water-in-oil emulsion method is faster than the case of the conventional solid-state reaction between lithium carbonate and corresponding reactants. The single phase of LiCo 1/3 Ni 1/3 Mn 1/3 O 2 was obtained at 650 °C. It was found that the submicro-sized LiCo 1/3 Ni 1/3 Mn 1/3 O 2 synthesized at 850 °C for 4 h in oxygen atmosphere presents the best electrochemical performance, which delivers an initial discharge capacity of 157 mAh g −1 in the cut-off voltage of 2.7–4.2 V, and exhibits good cycle performance.
- Published
- 2005