| 摘要 |
PCT No. PCT/GB94/00545 Sec. 371 Date Sep. 15, 1995 Sec. 102(e) Date Sep. 15, 1995 PCT Filed Mar. 17, 1994 PCT Pub. No. WO94/21560 PCT Pub. Date Sep. 29, 1994Lithium manganese ternary oxide Li Mn2 04+x is produced, where 0</=x</=0.2, by adding carbon to a manganese-containing solution such as manganese acetate and reacting the solution in an inert atmosphere with a lithium-containing compound such as lithium hydroxide and ammonia. Carbon is added in a proportion up to 8 percent of the weight of the Li Mn2 04+x produced, and preferably the proportion of carbon added is in the range 2 to 6 percent by weight of Li Mn2 04+x. The carbon is preferably carbon powder such as carbon black. Preferably, the Li Mn2 04+x produced as a gelatinous precipitate is dried and heat treated. Alternatively, lithium manganese ternary oxide Li Mn2 04+x is produced by reacting a manganese-containing compound with lithium carbonate. The reaction takes place in water and a precipitate is formed which is dried. The dried precipitate may be heat treated. The manganese-containing compound comprises manganese acetate. Carbon such as carbon powder may be added to the mixture before the reaction occurs. |
