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Preparation method for nickel cobalt lithium manganate LiNixConMn1-x-yO2 of anode material of lithium ion battery

A technology of nickel-cobalt lithium manganese oxide and lithium-ion batteries, which is applied in the field of new energy materials, can solve the problems of complex sol preparation process, irregular shape, and high calcination temperature, and achieve excellent electrochemical performance and overcome uneven shape. The effect of regularity and high energy density

Inactive Publication Date: 2012-10-03
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with other methods (such as high-temperature solid-phase method, co-precipitation method), the performance of the products prepared by it is higher, but there are problems such as segregation phenomenon in the heat treatment process, which leads to excessive calcination temperature, too long time, and irregular shape.
Moreover, the sol preparation process is more complex

Method used

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  • Preparation method for nickel cobalt lithium manganate LiNixConMn1-x-yO2 of anode material of lithium ion battery
  • Preparation method for nickel cobalt lithium manganate LiNixConMn1-x-yO2 of anode material of lithium ion battery
  • Preparation method for nickel cobalt lithium manganate LiNixConMn1-x-yO2 of anode material of lithium ion battery

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Embodiment 1

[0035] A kind of lithium ion battery cathode material nickel cobalt lithium manganese oxide LiNi x co y mn 1-x-y o 2 The preparation method, the method steps are as follows:

[0036] (1) Sol preparation;

[0037] Dissolve lithium nitrate, nickel nitrate, cobalt nitrate, and manganese acetate in a molar ratio of 1.05:0.4:0.4:0.2 in deionized water, and then add complexing agent polyacrylic acid (relative molecular mass: 800-1000, solid content: 30%) , configured so that the total concentration of cations (Li+Ni+Co+Mn) is 0.6mol / L, the molar ratio of polyacrylic acid monomer content to cations is 1, mix well, and heat and stir the mixed solution in a water bath at 60°C for 2h to obtain Transparent red sol.

[0038] (2) Gel preparation

[0039] ① Evaporate and concentrate the sol in a constant temperature water bath at 90°C until a solid wet gel is formed;

[0040]②Put the solid wet gel in a blast drying oven at 100°C and dry for 10 hours to obtain a solid xerogel. After t...

Embodiment 2

[0046] A kind of lithium ion battery cathode material nickel cobalt lithium manganese oxide LiNi x co y mn 1-x-y o 2 The preparation method, the method steps are as follows:

[0047] (1) Preparation of sol: dissolve lithium nitrate, nickel nitrate, cobalt nitrate, and manganese acetate in deionized water at a molar ratio of 1.05:0.33:0.33:0.33, then add complexing agent polyacrylic acid (relative molecular mass is 800-1000, The solid content is 30%), configured so that the total concentration of cations (Li+Ni+Co+Mn) is 0.8mol / L, and the molar ratio of polyacrylic acid monomer content to cations is 0.75, mix evenly, and put the mixed solution in a water bath at 60°C Under the condition of heating and stirring for 2h, a transparent red sol was obtained.

[0048] (2) Gel preparation

[0049] ① Evaporate and concentrate the sol in a constant temperature water bath at 90°C until a solid wet gel is formed;

[0050] ②Put the solid wet gel in an air-blast drying oven at 100°C f...

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Abstract

The invention discloses a preparation method for nickel cobalt lithium manganate LiNixConMn1-x-yO2 of an anode material of a lithium ion battery, which belongs to the technical field of a novel material for energy source. The preparation method comprises the following steps of: 1, dissolving lithium source compound, nickel source compound, cobalt source compound and manganese source compound in deion water, adding complexant polyacrylic acid (PAA), and heating and stirring to obtain transparent red collosol; 2, heating and concentrating, evaporating unnecessary water to obtain red wet gel, and drying in a bake oven to obtain dried gel; and 3, carrying out calcination and heat treatment for ground dried gel in a muffle furnace to obtain powders of nickel cobalt lithium manganate LiNixConMn1-x-yO2. The method provided by the invention has the advantages of simple process, environment-protection, low energy consumption high efficiency and the like.

Description

technical field [0001] The invention relates to a lithium ion battery cathode material nickel cobalt lithium manganese oxide LiNi x co y mn 1-x-y o 2 The preparation method belongs to the technical field of new energy materials. Background technique [0002] As a clean and efficient energy source, lithium-ion batteries have been widely used in portable mobile devices such as cameras, mobile phones, and notebook computers, and are gradually being used in electric vehicles. One of the key materials of lithium-ion batteries is the positive electrode material. It is precisely because of many problems of the positive electrode material that some applications of lithium-ion batteries are limited. In order to make lithium-ion batteries more widely used and easier to scale up, it is necessary to improve the performance of cathode materials. [0003] The cathode material widely used in commercial lithium-ion batteries is mainly LiCoO 2 . Due to its low capacity, high toxicity,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/505H01M4/48
CPCY02E60/122Y02E60/10
Inventor 梁小平刘建王化平薛萌萌任素娥李冬梅左蕊刘建新
Owner TIANJIN POLYTECHNIC UNIV
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