Microwave synthesis method for multi-element lithium manganate-doped positive electrode material of lithium ion battery

A lithium-ion battery, a technology doped with lithium manganese oxide, applied in battery electrodes, electrical components, circuits, etc., can solve problems such as short time

Inactive Publication Date: 2010-08-11
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The most important point is that the time taken for the synthesis

Method used

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  • Microwave synthesis method for multi-element lithium manganate-doped positive electrode material of lithium ion battery
  • Microwave synthesis method for multi-element lithium manganate-doped positive electrode material of lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Lithium carbonate micropowder with a purity of 99.5% and a particle size of 20 μm, industrially pure electrolytic manganese dioxide micropowder with a particle size of 30 μm, analytically pure magnesium oxide micropowder, analytically pure nickel sesquioxide micropowder, and analytically pure chromium trioxide micropowder are used as raw materials. Wherein each raw material is proportioned according to the atomic ratio, Li:Mn:Mg:Ni:Cr=1.00:1.5:0.02:0.01:0.02;

[0019] Add the weighed raw materials into deionized water for wet-bonding, the ratio of the raw materials to water is 1:1.2 by weight, mix them with a ball mill for 2 hours, put the wet-milled mixed raw materials into an oven at 100°C for 48 hours to dry, Dry-mix and sieve the dried raw materials as raw materials for microwave sintering;

[0020] Form the raw material on a hydraulic press, the forming pressure is 20Mpa, the blank size is φ50, and the height is 30mm;

[0021] Put the formed body into the microwav...

Embodiment 2

[0025] Lithium carbonate micropowder with a purity of 99.5% and a particle size of 25 μs, industrially pure electrolytic manganese dioxide micropowder with a particle size of 40 μs, analytically pure magnesium oxide micropowder, analytically pure nickel trioxide micropowder, and analytically pure chromium trioxide micropowder are used as raw materials. Wherein each raw material is proportioned according to the atomic ratio, Li:Mn:Mg:Ni:Cr=1.05:1.7:0.03:0.03:0.05;

[0026] Add the weighed raw materials into deionized water for wet-bonding, the ratio of the raw materials to water is 1:1.5 by weight, mix them with a ball mill for 3 hours, put the wet-milled mixed raw materials into an oven at 100°C for 54 hours to dry, Dry-mix and sieve the dried raw materials as raw materials for microwave sintering;

[0027] Form the raw material on the hydraulic press, the forming pressure is 25Mpa, the blank size is φ50 and the height is 40mm;

[0028] Put the formed body into the microwave ...

Embodiment 3

[0032] Lithium carbonate micropowder with a purity of 99.5% and a particle size of 30 μs, industrially pure electrolytic manganese dioxide micropowder with a particle size of 50 μs, analytically pure magnesium oxide micropowder, analytically pure nickel trioxide micropowder, and analytically pure chromium trioxide micropowder are used as raw materials. Wherein each raw material is proportioned according to the atomic ratio, Li:Mn:Mg:Ni:Cr=1.10:2.00:0.06:0.06:0.08;

[0033] Add the weighed raw materials into deionized water for wet-bonding, the ratio of the raw materials to water is 1:1.8 by weight, mix with a ball mill for 4 hours, put the wet-milled and mixed raw materials into an oven at 100°C for 60 hours for drying, Dry-mix and sieve the dried raw materials as raw materials for microwave sintering;

[0034] Form the raw material on a hydraulic press, the forming pressure is 30Mpa, the blank size is φ50 and the height is 50mm;

[0035] Put the formed body into the microwave ...

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Abstract

The invention relates to a microwave synthesis method for a multi-element lithium manganate-doped positive electrode material of a lithium ion battery. The method comprises the following steps: adding deionized water into raw materials comprising lithium carbonate micropowder, industrial pure electrolytic manganese dioxide micropowder, analytical pure magnesium oxide micropowder, nickelic trioxide micropowder and chromic oxide micropowder to perform wet combination; mixing the raw materials with a ball mill; drying; mixing and sieving the dried products to serve as crude materials; shaping the crude materials into green bodies, and putting the green bodies into a microwave oven for sintering; and after the sintering is finished, taking the materials out, crushing and sieving the materials to obtain the lithium manganate-doped positive electrode material of the lithium ion battery. The material serving as a positive electrode active material can be used for preparing a positive plate of the lithium ion battery. The method has the characteristics of simpleness, energy saving and consumption reduction, low cost and contribution to industrial production; and the assembled lithium ion battery has the advantages of high initial discharge capacity and high charge and discharge cycling performance. The lithium manganate-doped positive electrode material of the lithium ion battery obtained by the method can be applied to electric automobiles, mobile phones, laptops and other equipment.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrochemical power source materials, in particular to a microwave synthesis method of multi-element doped lithium manganese oxide as a positive electrode material of a lithium ion battery. It has broad application prospects in the field of commonly used secondary lithium ion batteries and power energy battery cathode materials. Background technique [0002] Due to its high output voltage, high specific energy, long cycle life, small self-discharge, safety, no memory effect and environmental friendliness, lithium-ion batteries have become the focus of the development of new energy materials in countries around the world. Among them, the cathode material is the key to lithium-ion batteries. At present, the main positive electrode materials are: lithium cobaltate, lithium nickelate, lithium manganate, etc. At present, only lithium cobaltate has been produced on a large scale in China. Sin...

Claims

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Application Information

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IPC IPC(8): H01M4/1391H01M4/505
CPCY02E60/122Y02E60/10
Inventor 康雪雅韩英崔涛
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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