LITHIUM MANGANESE DOUBLE OXIDE, ITS PRODUCTION AND USE

摘要

PURPOSE:To obtain fine particles of LiMn2O4 having large surface area and suitable as an anode of a non-aqueous lithium accumulator, etc., by mixing an Li material to an MoO2 having a prescribed BET specific surface area and a theta-type crystal structure and baking the mixture. CONSTITUTION:Manganese dioxide having theta-type crystal structure and a BET specific surface area of 150-500m<2>/g is mixed with a lithium material (e.g. lithium oxide) and the mixture is baked to obtain LiMn2O4) consisting of particles having particle diameter of <=10mum. A non-aqueous lithium accumulator having large cycle discharge capacity can be produced by using the obtained LiMn2O4 as the positive electrode, lithium or a lithium alloy (e.g. lithium/tin alloy) as the negative electrode and a non-aqueous electrolyte as the electrolyte. The MoO2 having theta-type crystal structure can be produced by carrying out the electrolytic reaction at high sulfuric acid concentration and high electric current density compared with those of conventional electrolytic MnO2 production process.