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Method for decreasing pH value of ternary material

A ternary material, PH value technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as reducing the PH value of ternary materials, and achieve the effect of reducing PH value, environmental friendliness and low cost

Active Publication Date: 2012-09-19
JIAN UTILITY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no patent that proposes a method to reduce the pH value of the ternary material. To solve this problem, a method for reducing the pH value of the ternary material is now provided.

Method used

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Examples

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Embodiment 1

[0016] A kind of method of reducing certain commercially available 532 type of the present invention (number of atoms of nickel-cobalt-manganese is, nickel: cobalt: manganese=5:2:3) ternary material micropowder pH value method, comprises the following steps:

[0017] (1) Weigh a commercially available 532 type ternary material micropowder (850 <12), wash with deionized water, the ratio of water to material is 2:1. After washing, filter with suction.

[0018] (2) The material obtained in step (1) is placed in the muffle furnace body for segmental sintering, and the temperature is raised to 85° C. at a heating rate of 50° C. / h, and kept for 8 hours.

[0019] (3) Then raise the temperature to 100-600°C at a heating rate of 50°C / h, and keep it warm for 8 hours, and the preferred temperature is 200°C.

[0020] (iv) After the sintering is completed, the material is taken out, and the particle size distribution range of ball milling is 850 <12 powder.

[0021] The pH value of gaine...

Embodiment 2

[0025] A kind of method of reducing certain commercially available 532 type of the present invention (number of atoms of nickel-cobalt-manganese is, nickel: cobalt: manganese=5:2:3) ternary material micropowder pH value method, comprises the following steps:

[0026] (1) Weigh a commercially available 532 type ternary material micropowder (850 4 HCO 3 solution for washing, control NH 4 HCO 3 The pH value of the solution = 11.0, NH 4 HCO 3 The ratio of solution and material is 2:1. After washing, filter with suction.

[0027] (2) The material obtained in step (1) is placed in the muffle furnace body for segmental sintering, and the temperature is raised to 85° C. at a heating rate of 50° C. / h, and kept for 8 hours.

[0028] (3) Then raise the temperature to 100-600°C at a heating rate of 50°C / h, and keep it warm for 8 hours, and the preferred temperature is 200°C.

[0029] (iv) After the sintering is completed, the material is taken out, and the particle size distribution...

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Abstract

The invention discloses a method for decreasing a pH value of a ternary material. The method comprises the following steps of: washing the ternary material which serves as a raw material by using deionized water or a solution which contains HCO3<->; performing suction filtration on the material; placing the material into a muffle furnace, and performing multi-step sintering; and ball-milling and grinding the material, and thus obtaining powder. The method has the advantages that 1) the material is washed by using the deionized water, resources are fully utilized, and the method is simple, easy to operate and low in cost; 2) when heated, the solution which contains the HCO3<-> is decomposed into water and carbon dioxide, which are environment-friendly and pollution-free; and 3) the method is novel, the pH value of the ternary material can be successfully decreased, and the electrochemical performance of a battery is improved.

Description

technical field [0001] The invention relates to a method for reducing the pH value of a lithium ion cathode material, in particular to a method for reducing the pH value of a ternary material. Background technique [0002] Lithium-ion battery is a newly discovered high specific energy power source at the end of the last century. Lithium-ion battery has many advantages such as high energy density, high voltage platform, no memory effect, wide operating temperature range, and no pollution to the environment. Since its inception, it has been widely used in portable electronic devices such as mobile communication tools, cameras, and notebook computers, and is also developing into high-capacity power batteries such as electric tools. In recent years, the output of lithium-ion batteries has grown rapidly, and the application fields have continued to expand. It has become a high-tech product that is of great significance to the national economy and people's lives in the 21st centu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/505
CPCY02E60/122Y02E60/10
Inventor 洪良仕许媛
Owner JIAN UTILITY TECH CO LTD
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