2016 年 31 巻 4 号 p. 239-246
Various types of cathode materials for lithium secondary battery were synthesized by spray pyrolysis in which mists generated with two-fluid nozzle or ultrasonic atomizer were thermally decomposed at an elevated temperature. The cathode materials had a spherical morphology with a narrow particle size distribution and uniform chemical composition. The cathode materials obtained by spray pyrolysis exhibited an excellent rechargeable capacity and a cycle stability. Pulse combustion spray pyrolysis formed oxide anode materials with the particles size less than 50 nm and exhibited a good rechargeable performance at a higher rate. Mass production of cathode materials was carried out by using flame-type spray pyrolysis. It was demonstrated that the cathode materials were continuously produced and that the rechargeable capacity and cycle performance of cathode materials were comparable with that obtained by spray pyrolysis. The flame-type spray pyrolysis had a high energy-saving for mass production of cathode materials. Therefore the spray pyrolysis process is effective for the synthesis of cathode and oxide anode materials.
