| abstract |
(57) [Summary] [Purpose] A lithium salt is mixed with at least one metal salt selected from manganese, iron, cobalt and nickel, When producing a complex oxide by sintering, the lithium salt and the metal salt are mixed with a polyfunctional carboxylic acid having a functionality of 3 or more and a polyhydric alcohol having a functionality of 2 or more and heated to carry out a condensation reaction and a complexation reaction. A composite oxide is produced at low temperature and in air by performing and then sintering. Also increase the specific surface area. [Structure] Citric acid is used as an example of polyvalent carboxylic acid, and ethylene glycol is used as an example of polyvalent alcohol. Lithium acetate and cobalt acetate are added to this, and the mixture is heated to about 140 ° C. to perform a condensation reaction and a complexation reaction. , A uniform gel body is formed, the metals are uniformly mixed at an atomic level, and then the temperature is raised to about 400 ° C. to perform a primary heat treatment, and then about 60 The temperature is raised to 0 ° C. and the secondary heat treatment is performed for sintering. |