Production of ultradispersed powders for the cathode materials of lithium ion storage batteries by thermal decomposition of salt solutions in a plasma jet

摘要

LlCoO_2, LINiO_2, LiMn_2O_4 ultradispersed powders are produced by means of thermal decomposition of mixed solutions of lithium nitrates and, correspondingly; cobalt, nickel, and manganese. It is shown that a plasmochemical technology should be employed for the synthesis of the materials of cathode materials of lithium ion storage batteries. Single-phase crystalline structures of powders of the systems Li-Co-O, Li-Ni-O, and Li-Mn-O are synthesized through use of LiCoO_2 powder already produced. Prototype samples of lithium ion storage batteries with charge and discharge characteristics close to those of series-produced batteries produced by the firm of Sony are fabricated. It is shown that directed variation of the crystalline structure of cathode materials can be achieved by varying the temperature regime in the plasmochemical reactor and the ratio of the concentrations of the salt-forming elements in the starter solutions.