Preparation of Ultrafine LiCoO_2 by Sol-Gel Method

摘要

Li (CH₃COOH) .2H₂O and Co (NO₃)₂ 6H₂0 was dissolved in distilled water, and the aqueous solution of PAA having a molar ratio of polyacrylic acid (PAA) to total metal ion was 0.25 or more. The pH of the mixed aqueous solution was adjusted to 1 to 2 And the sol is heated gradually at 50 to 90C to form a sol. The sol is gradually heated to prepare a gel precursor. The gel precursor is heat treated at 300C or more for 1 hour or more in an air atmosphere to prepare a precursor powder. This precursor powder was fired at 400 to 900C for 1 hour or more in an air atmosphere to obtain LiCoO₂The process for producing the powder is simple and economical, and the produced LiCoO₂The powder is fine particles and has a large specific surface area and exhibits excellent physical properties as a cathode material of the lithium secondary battery.