Preparation method of nickel magnesium cobalt hydroxide

A technology of hydroxide and nickel-manganese-cobalt, which is applied in the direction of nickel oxide/nickel hydroxide, electrode manufacturing, structural parts, etc., can solve problems such as solid nickel-manganese-cobalt hydroxide, and achieve local overconcentration , The effect of saving production costs
CN1966410AActive Publication Date: 2007-05-23BYD CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BYD CO LTD
Publication Date
2007-05-23

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Abstract

The invention relates to a way to prepare nickel, manganum and cobalt hydroxide. The method includes making the mixed solution a coprecipitate with mixed solution B in base solution C. The mixed solution A contains nickel salt, manganese salt and cobalt salt, the mixed solution B is a strong base solution, the base solution C is aqueous ammonia solution. The solution A also contains ammonium salt while solution B also contains aqueous ammonia; besides, after being mixed, the molarity of ammonia in solution A and solution B is the same with that in solution C. The precipitation in the invention is easier to control the ammonia density in reaction system so that it managed to control the precipitation particle size of the nickel, manganese and cobalt hydroxide precipitation. The previous reaction can go smoothly at 5-40 Deg C without extra heating and temperature-controlling device so that can substantially reduce the producing cost.
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Description

technical field

[0001] The invention relates to a method for preparing nickel-manganese-cobalt hydroxide, a cathode material of a lithium ion battery, in particular to a method for preparing nickel-manganese-cobalt hydroxide by a co-precipitation method. Background technique

[0002] Lithium-ion batteries have the characteristics of high energy, long life, and low pollution, and are widely used in many fields such as portable electronic devices and electric vehicles. The cathode material occupies the most important position in the composition of lithium-ion battery products. The quality of the cathode material directly determines the performance index of the final secondary battery product, and its performance and price directly affect the performance and price of the lithium-ion battery.

[0003] At present, the positive electrode materials of lithium-ion batteries that have been studied more include the transition metal oxide LiCoO with a layered structure. 2 , LiNiO 2 ,...

Claims

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