POSITIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY CELL AND SECONDARY CELL USING THE SAME, AND METHOD FOR PRODUCING POSITIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY CELL

摘要

An anode material for lithium secondary cells comprises secondary particles of a lithium transition metal composite oxide including boron and/or bismuth. The atomic ratio of boron and bismuth to the total of metal atoms other than boron and bismuth is 5-70 times of the atomic ratio in the whole of the secondary particles. Independent claims are also included for the following: (i) an anode for lithium secondary cells containing the positive electrode material and a binder; (ii) a lithium secondary cell comprising the above anode, a cathode and an electrolyte; and (iii) the manufacture of the anode material by forming the raw material mixture into a particle shape, and sintering at a temperature higher than the melting point of the boron and bismuth compounds to form the secondary particles.