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Carbon-coated manganese oxide negative electrode material and preparation method thereof

A negative electrode material, manganese oxide technology, applied in the direction of negative electrode, battery electrode, active material electrode, etc., can solve problems such as poor electrical performance, and achieve the effect of efficient coating, isolation of contact, and improvement of cycle stability

Active Publication Date: 2018-07-10
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on the technical problems existing in the background technology, the present invention proposes a carbon-coated manganese oxide negative electrode material and its preparation method to make up for the defects of poor electrical properties of the existing carbon-coated manganese oxide negative electrode materials

Method used

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  • Carbon-coated manganese oxide negative electrode material and preparation method thereof
  • Carbon-coated manganese oxide negative electrode material and preparation method thereof
  • Carbon-coated manganese oxide negative electrode material and preparation method thereof

Examples

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Embodiment 1

[0029] A carbon-coated manganese oxide negative electrode material, the raw materials of the carbon-coated manganese oxide negative electrode material include a manganese source, an organic ligand and a solvent; wherein, the organic ligand is an organic compound containing carboxylic acid or nitrogen and carboxylic acid small molecule compounds.

[0030] The preparation method of the carbon-coated manganese oxide negative electrode material, the preparation method comprises the following steps:

[0031] S1. Put the manganese source, organic ligand and solvent in a polytetrafluoroethylene reactor and mix them thoroughly, then place them in a blast drying oven to heat, cool, filter, wash the filter residue, and dry the filter residue to obtain a manganese polymer ;

[0032] S2. Calcining the manganese polymer in a high-temperature furnace and cooling or cooling to room temperature to obtain a carbon-coated manganese oxide negative electrode material.

Embodiment 2

[0034] A carbon-coated manganese oxide negative electrode material, the raw materials of the carbon-coated manganese oxide negative electrode material include a manganese source, an organic ligand and a solvent; wherein, the organic ligand is an organic compound containing carboxylic acid or nitrogen and carboxylic acid Small molecule compounds;

[0035] Wherein, the manganese source is manganese nitrate;

[0036] The organic ligand is 3,5-pyridinedicarboxylic acid;

[0037] Described solvent is deionized water;

[0038] The molar ratio of the manganese source to the organic ligand is 1:0.625;

[0039] The molar volume (mmol / ml) ratio of the manganese source to the solvent is 1:37.5.

[0040] The preparation method of the carbon-coated manganese oxide negative electrode material, the preparation method comprises the following steps:

[0041] S1. Put the manganese source, organic ligand and solvent in a polytetrafluoroethylene reactor and mix them thoroughly, then place the...

Embodiment 3

[0049] A carbon-coated manganese oxide negative electrode material, the raw materials of the carbon-coated manganese oxide negative electrode material include a manganese source, an organic ligand and a solvent; wherein, the organic ligand is an organic compound containing carboxylic acid or nitrogen and carboxylic acid Small molecule compounds;

[0050] Wherein, the manganese source is manganese acetate;

[0051] The organic ligand is 4-pyridinecarboxylic acid;

[0052] Described solvent is dimethylformamide;

[0053] The molar ratio of the manganese source to the organic ligand is 1:0.5;

[0054] The molar volume (mmol / ml) ratio of the manganese source to the solvent is 1:45.

[0055] The preparation method of the carbon-coated manganese oxide negative electrode material, the preparation method comprises the following steps:

[0056] S1. Put the manganese source, organic ligand and solvent in a polytetrafluoroethylene reactor and mix them thoroughly, then place them in a...

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Abstract

The invention discloses a carbon-coated manganese oxide negative electrode material. The carbon-coated manganese oxide negative electrode material comprises the raw materials of a manganese source, anorganic ligand and a solvent, wherein the organic ligand is an organic small molecule compound comprising carboxylic acid or nitrogen and carboxylic acid. The invention also discloses a preparation method of the carbon-coated manganese oxide negative electrode material. The carbon-coated manganese oxide negative electrode material is high carbon coating efficiency, manganese dissolving out in anelectrolyte can be suppressed effectively, and high cycle stability is achieved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a carbon-coated manganese oxide negative electrode material and a preparation method thereof. Background technique [0002] In 1991, Sony Corporation of Japan launched the first commercial lithium-ion battery to the market for the first time. Compared with traditional batteries, lithium-ion batteries have the advantages of high energy density, long cycle life, and environmental friendliness, and occupy an important position in people's daily life. increasingly important position. Especially after entering the 21st century, as people's requirements for environmental protection are getting higher and higher, vigorously developing the new energy industry has been sought after by countries all over the world. With the rapid development of portable electronic terminals, electric vehicles and energy storage industries, people have put forward higher requirements for the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/50H01M4/62H01M10/0525
CPCH01M4/366H01M4/50H01M4/625H01M4/628H01M10/0525H01M2004/027Y02E60/10
Inventor 许鹏
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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