| 摘要 |
PCT No. PCT/JP94/00530 Sec. 371 Date Apr. 12, 1995 Sec. 102(e) Date Apr. 12, 1995 PCT Filed Mar. 31, 1994 PCT Pub. No. WO94/22767 PCT Pub. Date Oct. 13, 1994A process for producing a compound of the formula LiM3+O2 (wherein M3+ Ni3+ is or/and Co3+) or LiMn2O4 is provided which comprises the steps of reacting a basic metal salt represented by the formula M2+(OH)2-nx(An-)xxmH2O (wherein M2+ is at least one member selected from among Ni2+, Co2+ and Mn2+, An- is an n-valent anion (provided that n is 1 to 3), such as NO3-, Cl-, Br-, CH3COO- and CO32- and x and m are positive numbers respectively satisfying 0.03</=x</=0.3 and 0</=m</=2) with an alkaline water-soluble lithium compound in a molar ratio of Li/M2+ of 0.3 to 1.3 in an aqueous medium to obtain a slurry, drying the obtained slurry, and firing the resultant residue at about 500 DEG C. or higher in an oxidative atmosphere. This process ensures production of the LiM3+O2 and LiMn2O4, which are highly purified and have high crystallization degrees, in large quantities on a commercial scale. The thus produced LiNi3+O2 exhibits excellent charge-discharge characteristics as an active material of a positive electrode of a secondary battery.
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