Non-aqueous electrolyte secondary battery
A non-aqueous electrolyte and secondary battery technology, which is applied to secondary batteries, battery electrodes, battery components, etc., can solve the problems of inability to prevent battery capacity decline and insufficient improvement effect
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Embodiment 1
[0064] (1) Preparation of positive electrode active material
[0065] in NiSO 4 In the aqueous solution, Co and Al sulfates were added in such a way that Ni:Co:Al = 7:2:1 (molar ratio), to prepare an aqueous solution with a metal ion concentration of 2 mol / L. By slowly dropping 2 mol / L sodium hydroxide solution into the aqueous solution under agitation for neutralization, a co-precipitation method is used to form a 0.7 Co 0.2 Al 0.1 (OH) 2 Indicates the composition of the ternary system of the precipitate. The precipitate was separated by filtration, washed with water, and dried at 80° C. to obtain a composite hydroxide. The average particle diameter of the obtained composite hydroxide was measured with a particle size distribution analyzer (trade name: MT-3000, manufactured by Nikkiso Co., Ltd.), and the average particle diameter was 10 μm.
[0066] The composite hydroxide was heated in the atmosphere at 900°C for 10 hours for heat treatment to obtain 0.7 Co 0.2 Al 0.1...
Embodiment 2
[0079] A cylindrical battery B according to the present invention was fabricated in the same manner as in Example 1, except that a porous film was formed on both surfaces of the negative electrode instead of the positive electrode.
Embodiment 3
[0081] Except that the porous membrane is formed on one surface of the separator instead of the positive electrode, and when the electrode group is produced, the positive electrode and the porous membrane on the surface of the separator are arranged to face each other, and the cylindrical shape of the present invention is produced in the same manner as in Example 1. battery C.
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