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Synthesis method of a high-performance lithium-rich manganese-based cathode material with a cubic structure

A cathode material, lithium-rich manganese-based technology, applied in the field of synthesis of high-performance lithium-rich manganese-based cathode materials with a cubic structure, can solve the problems of restricting the development of lithium-ion batteries and poor cycle performance, and achieve excellent lithium battery performance, low cost, The effect of simple process

Active Publication Date: 2020-09-01
SUZHOU YOULION BATTERY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently commercially used lithium-rich manganese-based cathode materials have the disadvantage of poor cycle performance, which largely restricts the development of lithium-ion batteries.

Method used

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  • Synthesis method of a high-performance lithium-rich manganese-based cathode material with a cubic structure
  • Synthesis method of a high-performance lithium-rich manganese-based cathode material with a cubic structure

Examples

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Embodiment 1

[0022] This example shows a high-performance lithium-rich manganese-based positive electrode material with a cubic structure, and the specific steps are as follows:

[0023] A method for synthesizing a high-performance lithium-rich manganese-based cathode material with a cubic structure, comprising the following steps:

[0024] (1) Cobalt sulfate, nickel sulfate, and manganese sulfate with a molar mass ratio of 1:2:7 are dissolved in deionized water, and weakly alkaline lithium acetate is added as a pH buffer to form solution A;

[0025] (2) Dissolving the two-carbon compound—dimethyl oxalate in ethanol to form solution B;

[0026] (3) Mix the solutions A and B, and synthesize the precursor of the positive electrode material with a cubic structure by the traditional hydrothermal method, wherein the hydrothermal temperature is 150°C, and the hydrothermal time is 6h;

[0027] (4) After the precursor is filtered, washed, dried, doped with lithium, pre-calcined, ground, and calci...

Embodiment 2

[0029] This example shows a high-performance lithium-rich manganese-based positive electrode material with a cubic structure, and the specific steps are as follows:

[0030] A method for synthesizing a high-performance lithium-rich manganese-based cathode material with a cubic structure, comprising the following steps:

[0031] (1) Cobalt sulfate, nickel sulfate, and manganese sulfate with a molar mass ratio of 1:2:7 are dissolved in deionized water, and weakly alkaline sodium acetate is added as a pH buffer to form solution A;

[0032] (2) Dissolving the two-carbon compound—dimethyl oxalate in ethanol to form solution B;

[0033] (3) Mix the solutions A and B, and synthesize the precursor of the positive electrode material with a cubic structure by the traditional hydrothermal method, wherein the hydrothermal temperature is 250°C, and the hydrothermal time is 18h;

[0034] (4) After the precursor is filtered, washed, dried, doped with lithium, pre-calcined, ground, and calci...

Embodiment 3

[0036] This example shows a high-performance lithium-rich manganese-based positive electrode material with a cubic structure, and the specific steps are as follows:

[0037] A method for synthesizing a high-performance lithium-rich manganese-based cathode material with a cubic structure, comprising the following steps:

[0038] (1) Cobalt sulfate, nickel sulfate, and manganese sulfate with a molar mass ratio of 1:2:7 are dissolved in deionized water, and weakly alkaline lithium acetate is added as a pH buffer to form solution A;

[0039] (2) Dissolving the two-carbon compound—dimethyl oxalate in ethanol to form solution B;

[0040] (3) Mix the solutions A and B, and synthesize the precursor of the positive electrode material with a cubic structure by the traditional hydrothermal method, wherein the hydrothermal temperature is 200°C, and the hydrothermal time is 12h;

[0041] (4) After the precursor is filtered, washed, dried, doped with lithium, pre-calcined, ground, and calc...

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Abstract

The invention discloses a synthetic method of a high-performance lithium-rich manganese-based cathode material having a cube structure. The method comprises the following steps: dissolving cobalt sulphate, nickel sulfate and manganese sulfate in deionized water, and adding an alkalescence pH buffering agent to form a solution A; dissolving a double-carbon compound in ethanol to form a solution B;mixing the solution A and the solution B, employing a hydrothermal method for synthesizing a precursor of the cathode material having the cube structure; filtering the precursor, washing the precursor, drying the precursor, and calcining the material to obtain the high-performance lithium-rich manganese-based cathode material having the cube structure. The high-performance lithium-rich manganese-based cathode material takes cobalt sulphate, nickel sulfate, and manganese sulfate as metal sources, the double-carbon compound is taken as a precipitating agent, lithium acetate or sodium acetate istaken as the pH buffering agent, and the hydrothermal method is employed for synthesizing the cathode material having the cube structure. The method has the advantages of simple process and low cost,and the synthesized cathode material having the cube structure has excellent lithium-ion battery performance.

Description

technical field [0001] The invention relates to a synthesis method of a lithium-ion battery cathode material, in particular to a synthesis method of a high-performance lithium-rich manganese-based cathode material with a cubic structure. Background technique [0002] Lithium-ion battery cathode materials, as an important part of lithium-ion batteries, play a vital role in the electrochemical performance of lithium-ion batteries. At present, lithium-rich manganese-based cathode materials are favored by researchers at home and abroad, mainly due to the high theoretical capacity of lithium-rich manganese-based cathode materials, and the low price and abundant storage of manganese. However, the currently commercially used lithium-rich manganese-based cathode materials have the disadvantage of poor cycle performance, which largely restricts the development of lithium-ion batteries. [0003] Therefore, it is necessary to provide a method for the synthesis of high-performance lith...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/0525
CPCH01M4/362H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 赵蒙晰
Owner SUZHOU YOULION BATTERY INC
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