Preparation method of spherical nickel-lithium manganate anode material

A technology of lithium nickel manganate and cathode material, applied in the field of cathode material of chemical power supply lithium ion battery, can solve the problems of high equipment condition requirements and complex process, and achieve the effects of good processing performance, simple process and rich source of raw materials
CN103579607AActive Publication Date: 2014-02-12CNOOC TIANJIN CHEM RES & DESIGN INST +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CNOOC TIANJIN CHEM RES & DESIGN INST
Publication Date
2014-02-12

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Abstract

The invention discloses a preparation method of a spherical nickel-lithium manganate anode material. The preparation method is characterized by comprising the following steps: weighing a lithium source compound, a nickel source compound and spherical manganous-manganic oxide by a mol ratio of 2:1:1; dissolving the lithium source compound and the nickel source compound in ethanol to prepare a solution of which the total concentration of metal cation is 0.1-0.3 mol / L; adding the spherical manganous-manganic oxide into the solution; heating the solution in a water bath with stirring until a paste-like mixture is formed; drying the paste-like mixture at 90-110 DEG C to obtain gray black powder; roasting the obtained powder at 750-950 DEG C for 6-36 hours; annealing at 615-675 DEG C for 2-6 hours; cooling, directly sieving, and then obtaining the nickel-lithium manganate anode material. The lithium source compound is lithium acetate or lithium nitrate, and the nickel source compound is nickel acetate or nickel nitrate. The water-bath heating temperature is 50-70 DEG C.
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Description

Technical field

[0001] The invention belongs to the technical field of lithium ion battery cathode materials for chemical power sources, and is a method for preparing spherical lithium nickel manganate cathode materials, and particularly relates to a method for preparing high-voltage anode material lithium nickel manganate. technical background

[0002] Spinel lithium nickel manganese oxide (LiNi 0.5 Mn 1.5 O 4 ) Cathode material is one of the most researched high-energy density cathode materials. Its discharge voltage platform is 4.7V, which is about 20% higher than that of lithium manganate, and its reversible capacity can reach 130mAh / g (theoretical 147mAh / g), which is also about 20% higher than that of lithium manganate, thus having a higher performance than lithium manganate. Energy density, more critically, is that all Mn in the structured lithium nickel manganese oxide is +4 valence, which eliminates the disproportionation reaction and the Young-Taylor effect caused, and h...

Claims

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