Positive plate active material and nonaqueous electrolyte secondary cell using same
A non-aqueous electrolyte, cathode active material technology, applied in non-aqueous electrolyte storage batteries, secondary batteries, active material electrodes, etc., can solve the problems of bad battery effects, capacity reduction, hindering the miniaturization and cost reduction of lithium-ion batteries, etc.
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Embodiment 1
[0139] First, the first lithium transition metal composite oxide (A) was prepared in the following manner. For the first lithium transition metal composite oxide material, lithium hydroxide, nickel monoxide, and cobalt oxide, which are commercially available, were used. Lithium hydroxide, nickel monoxide and cobalt oxide were mixed in the following mixing ratio to prepare a first lithium transition metal composite oxide. Specifically, in Example 1, in the absence of the additive M of a compound consisting of one or more transition metals or elements selected from Group 2, 3 and 4 elements of the long-form periodic table, The first lithium transition metal composite oxide was prepared.
[0140] Therefore, mixing is performed so that in the above chemical formula (1) Li representing the first lithium transition metal composite oxide x Ni 1-y-z co y m z o 2 where x, 1-y-z, y and z satisfy x=1.02, 1-y-z=0.70, y=0.30 and z=0.
[0141] Next, the mixture obtained by mixing lit...
Embodiment 2
[0151] In Example 2, aluminum hydroxide was used as a material for the first lithium transition metal composite oxide in addition to lithium hydroxide, nickel monoxide, and cobalt oxide, and these materials were mixed in the following ratio. In addition to mixing so that in the chemical formula (1) Li representing the first lithium transition metal composite oxide x Ni 1-y-z co y m z o 2 In addition to x, 1-y-z, y, z and M satisfying x=1.02, 1-y-z=0.70, y=0.25, z=0.05 and M=Al, the first lithium transition metal of LiNiCoAlO is prepared similarly to Example 1 composite oxides. A nonaqueous electrolyte secondary battery was fabricated similarly to Example 1 except that this first lithium transition metal composite oxide was used.
Embodiment 3
[0153] In Example 3, aluminum hydroxide was used as a material for the second lithium transition metal composite oxide in addition to lithium hydroxide, nickel monoxide, and cobalt oxide, and these materials were mixed in the following ratio. In addition to mixing so that in the chemical formula (2) Li representing the second lithium transition metal composite oxide s Ni 1-t-u mn t M' u o 2 In addition to s, 1-t-u, t, u and M' satisfying s=1.02, 1-t-u=0.65, t=0.30, u=0.05 and M'=Al, the second lithium of LiNiMnAlO is prepared similarly to Example 1 Transition metal composite oxides. A nonaqueous electrolyte secondary battery was fabricated similarly to Example 1 except that this second lithium transition metal composite oxide was used.
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