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Special distribution nickel-cobalt-lithium manganate ternary lithium battery anode material and preparation method

A nickel-cobalt lithium manganese oxide and ternary lithium battery technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem of difficult control of ternary material components, and achieve easy control of product performance, high capacity, and high stability sexual effect

Inactive Publication Date: 2017-06-27
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The battery material prepared by the present invention overcomes the technical defects that other impurity phases are easily introduced during the modification process, and the composition of the ternary material is not easy to control, and the prepared ternary positive electrode material has both high capacity, high stability, and high voltage cycle performance OK, fast charging possible

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Take filiform nickel oxide with a wire diameter of 10-50nm and a length of 3-9 microns, spherical manganese oxide with a particle diameter of 50-100nm, and a flake with a diameter of 2-5 microns and a thickness of 15-30nm Cobalt oxide is used as a raw material, and the HF acid solution with a volume ratio of HF acid and deionized water of 1:25 is used to activate and dry the material to obtain activated filamentous nickel oxide, spherical manganese oxide, and flaky cobalt oxide micropowder. The activation time is 15 minutes;

[0031](2) Take 2 parts by weight of soluble manganese sulfate solution, nickel sulfate solution and cobalt sulfate solution with a concentration of 400mg / ml respectively by mass, and take 6 parts by weight of lithium phosphate solution with a concentration of 1000mg / ml by mass, and take a concentration of 600mg 1.6 parts by weight of citric acid aqueous solution per ml, mixed uniformly to obtain a lithium source solution. Add the lithium sour...

Embodiment 2

[0037] (1) Take filiform nickel oxide with a wire diameter of 10-50nm and a length of 1-5 microns, spherical manganese oxide with a particle diameter of 100-200nm, and a flake with a diameter of 1-5 microns and a thickness of 30-50nm Cobalt oxide is used as raw material, and the material is activated by HF acid solution with a volume ratio of HF acid and deionized water of 1:5, and dried to obtain activated filamentous nickel oxide, spherical manganese oxide, and flaky cobalt oxide micropowder. The activation time is 30 minute;

[0038] (2) Take 2 parts by weight of soluble manganese sulfate solution, nickel sulfate solution and cobalt sulfate solution with a concentration of 750mg / ml respectively by mass, and take 6 parts by weight of lithium carbonate solution with a concentration of 450mg / ml by mass, and take a concentration of 700mg 0.5 parts by weight of citric acid aqueous solution per ml, mixed uniformly to obtain a lithium source solution. Add the lithium source solut...

Embodiment 3

[0044] (1) Take filiform nickel oxide with a wire diameter of 50nm and a length of 9 microns, spherical manganese oxide with a particle diameter of 100 nm, and flaky cobalt oxide with a diameter of 1 micron and a thickness of 10 nm as raw materials. The HF acid solution with a volume ratio of 1:5 of ionized water activates the material, activates filamentous nickel oxide, spherical manganese oxide, and flake cobalt oxide micropowder, and the activation time is 10 minutes;

[0045] (2) Take 2 parts by weight of soluble manganese nitrate solution, nickel nitrate solution and cobalt nitrate solution with a concentration of 700mg / ml respectively by mass, and take 6 parts by weight of lithium nitrate solution with a concentration of 1000mg / ml by mass, and take a concentration of 800mg 1.2 parts by weight of citric acid aqueous solution per ml, mixed uniformly to obtain a lithium source solution. Add the lithium source solution to the soluble manganese nitrate solution, nickel nitra...

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Abstract

The invention provides a special distribution nickel-cobalt-lithium manganate ternary lithium battery anode material and a preparation method. The method comprises the steps of preparing high-nickel ternary nickel-cobalt-lithium manganate into a filament, preparing high-manganese ternary nickel-cobalt-lithium manganate into a sphere, preparing high-cobalt ternary nickel-cobalt-lithium manganate into a sheet, and assembling and connecting three ternary materials in special structures via molten tin to form the ternary anode material, wherein respective unstable defects of the three ternary materials are overcome by shapes. The method overcomes the technical defect that ingredients of the ternary materials are not easy to control since other impure phases are easily introduced in a modification process; with the adoption of the advantages of the three materials and via unstable structure improvement by the shapes, the prepared battery anode material has high capacity, high stability and good high voltage cyclicity; quick charge can be achieved; other impure phases are not introduced in the whole process; a preparation technology is easy to master; the electrode material can be formed at one step; a coating technology is not required.

Description

technical field [0001] The invention relates to the field of battery materials, in particular to a positive electrode material of a nickel-cobalt-lithium manganese oxide ternary lithium battery with irregular distribution and a preparation method thereof. Background technique [0002] Lithium-ion battery is a new generation of green high-energy battery with excellent performance, and has become one of the focuses of high-tech development. Lithium-ion batteries have the following characteristics: high voltage, high capacity, low consumption, no memory effect, no pollution, small size, small internal resistance, less self-discharge, and more cycles. Because of the above-mentioned characteristics, lithium-ion batteries have been applied to many civilian and military fields such as mobile phones, notebook computers, video cameras, and digital cameras. The main constituent materials of lithium-ion batteries include electrolyte, separator materials, positive and negative electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/505H01M4/525H01M10/0525
CPCH01M4/366H01M4/387H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 陈庆王镭迪曾军堂
Owner CHENDU NEW KELI CHEM SCI CO LTD
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