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Lithium-enriched ternary anode material of power lithium-ion battery and preparation method of lithium-enriched ternary anode material

A lithium-ion battery and cathode material technology, applied in battery electrodes, electrical components, circuits, etc., can solve the problem of low capacity and achieve the effects of high capacity, uniform distribution and excellent cycle performance

Inactive Publication Date: 2013-09-04
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is in order to solve the lithium ion battery cathode material LiCoO that has been commercialized on the market 2 、LiFePO 4 To provide a lithium-rich ternary cathode material for a power lithium-ion battery due to the defect of low capacity

Method used

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  • Lithium-enriched ternary anode material of power lithium-ion battery and preparation method of lithium-enriched ternary anode material
  • Lithium-enriched ternary anode material of power lithium-ion battery and preparation method of lithium-enriched ternary anode material
  • Lithium-enriched ternary anode material of power lithium-ion battery and preparation method of lithium-enriched ternary anode material

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Embodiment 1

[0041] A lithium-rich ternary cathode material for power-type lithium-ion batteries, whose molecular formula is Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 .

[0042] The above-mentioned lithium-rich ternary cathode material for power lithium-ion battery Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 The preparation method specifically includes the following steps:

[0043] (1) Dissolve 3.2136g lithium acetate, 0.8302g cobalt acetate, 0.8294g nickel acetate, and 3.2678g manganese acetate in deionized water to form solution 1;

[0044] The amounts of lithium acetate, nickel acetate, cobalt acetate, and manganese acetate used above are calculated based on the molar ratio of Li:Co:Ni:Mn:O, that is, Li:Co:Ni:Mn:O is 1.26:0.13:0.13:0.54: 2;

[0045] The lithium acetate used above is excessively 5% to make up for the loss of lithium during subsequent calcination;

[0046] (2) Dissolve 4.2028g citric acid citric acid in deionized water to form solution 2;

[0047] The amount of citric acid used above is calculated...

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Abstract

The invention discloses a lithium-enriched ternary anode material of a power lithium-ion battery and a preparation method of the lithium-enriched ternary anode material. The molecule formula of the lithium-enriched ternary anode material of the power lithium-ion battery is Li1.2Ni0.13Co0.13Mn0.54O2. The preparation method comprises the following steps of: dissolving lithium acetate, cobaltous acetate, nickel acetate and manganese acetate in deionized water according to the molar ratio of Li: Co: Ni: Mn: O being 1.2: 0.13: 0.13: 0.54: 2 to obtain a solution 1; adding citric acid according to the ratio of the molar weight of the citric acid to the total molar weight of Ni, Co and Mn being 1:1 to obtain a solution 2; dropwise adding the solution 2 into the solution 1, and then adjusting the pH value to 9, continuously stirring the solution at the temperature of 80 DEG C until purple gel is formed, and then sequentially drying, ball milling, calcining segment by segment and grinding to obtain the lithium-enriched ternary anode material of the power lithium-ion battery with large discharging specific capacity and good cycling performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of positive electrode materials for lithium ion batteries, and in particular relates to a lithium-rich ternary positive electrode material for a power type lithium ion battery and a preparation method thereof. Background technique [0002] The power, voltage and other properties of the cathode material of lithium-ion batteries are the key factors affecting the energy density, safety performance and cycle life of the battery. At present, the commercialized lithium-ion battery cathode material LiCoO 2 、LiFePO 4 The capacities are 140mAh / g and 160mAh / g respectively, so it is urgent to develop high-capacity cathode materials for lithium-ion batteries. Since Argonne National Laboratory in the United States applied for a patent for lithium-rich layered cathode materials in 2001, this material has a high specific capacity (greater than 200mAh / g), excellent cycle performance, and low cost (low cobal...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/10
Inventor 徐群杰靳雪李巧霞韩杰周罗增
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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