Synthesis by a soft chemistry route and characterization of LiNixCo1−xO2 (0 ≤ x ≤ 1) cathode materials

✍ Scribed by D. Caurant; N. Baffier; B. Garcia; J.P. Pereira-Ramos

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 875 KB
• Volume: 91
• Category: Article
• ISSN: 0167-2738
• DOI: 10.1016/s0167-2738(96)00418-3

✦ Synopsis

LiNi Co ,+xO, cathode materials have been prepared using a soft chemistry route for 0 5 x 5 1. Co-precipitation of hydroxides is followed by drying and heating at temperatures between 700 and 800°C for a short time (2 to 5 h) under oxygen flow. Due to the high reactivity of the co-precipitates, preparation time is shorter than with powders mixing methods generally used. A DTA-TGA study has been performed for each co-precipitate. LiNi,Co,_,O, compounds show good crystallinity, but lithium deficiency appears for nickel-rich samples. LiNi,,, Co,,,O, shows the best electrochemical charge-discharge behavior among all the nickel-cobalt compounds studied. This has been attributed to a low lithium deficiency and to a high nickel content.