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Method for preparing transition metal oxide composite electrode for lithium battery

A composite electrode and transition metal technology, which is applied in battery electrodes, lithium batteries, electrode manufacturing, etc., can solve the problems that the coating layer is difficult to conduct and protect, and affects lithium batteries, so as to improve electrochemical performance and cycle Performance, Erosion Reduction Effect

Inactive Publication Date: 2020-11-03
安徽南都华铂新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the positive electrode material is composited with carbon and metal, it can improve the conductivity efficiency, but the coating layer itself is difficult to play a conductive and protective role, which in turn affects the performance of the lithium battery.

Method used

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  • Method for preparing transition metal oxide composite electrode for lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing a transition metal oxide composite electrode for a lithium battery, comprising the steps of:

[0028] S1. Using nickel nitrate hexahydrate and ferric nitrate nonahydrate as raw materials, add them into deionized water at a molar ratio of 1:2.02, mechanically stir at 150r / min for 30min, add metal oxides after fully dissolving, and continue stirring for 110min to obtain a mixed solution;

[0029] S2. Add ammonia water with a mass concentration of 15% to the above mixed solution dropwise, adjust the pH value of the mixed solution to 9.0, continue stirring for 30 minutes, filter with suction, wash, and dry the product in a blast drying oven at 80°C to obtain a precursor Material;

[0030] S3. Put the precursor material in a tube furnace, raise the temperature of the tube furnace at a rate of 30°C / min, raise the temperature to 600°C, sinter in the air for 3 hours, cool to room temperature with the furnace, and discharge the material to prepare Get coa...

Embodiment 2

[0033] A method for preparing a transition metal oxide composite electrode for a lithium battery, comprising the steps of:

[0034] S1. Using nickel nitrate hexahydrate and ferric nitrate nonahydrate as raw materials, add them into deionized water at a molar ratio of 1:2.02, mechanically stir at 150r / min for 35min, add metal oxides after fully dissolving, and continue stirring for 115min to obtain a mixed solution;

[0035] S2. Add ammonia water with a mass concentration of 15% to the above mixed solution dropwise, adjust the pH value of the mixed solution to 9.1, continue to stir for 35 minutes, filter with suction, wash, and dry the product in a blast drying oven at 80°C to obtain a precursor Material;

[0036] S3. Put the precursor material in the tube furnace, raise the temperature of the tube furnace at a rate of 30°C / min, raise the temperature to 630°C, sinter in the air for 3.5 hours, cool to room temperature with the furnace, and discharge the material. Prepare coated...

Embodiment 3

[0039] A method for preparing a transition metal oxide composite electrode for a lithium battery, comprising the steps of:

[0040] S1. Using nickel nitrate hexahydrate and ferric nitrate nonahydrate as raw materials, add them into deionized water at a molar ratio of 1:2.02, mechanically stir at 150r / min for 40min, add metal oxides after fully dissolving, and continue stirring for 120min to obtain a mixed solution;

[0041] S2. Add ammonia water with a mass concentration of 15% to the above mixed solution dropwise, adjust the pH value of the mixed solution to 9.2, continue to stir for 40 minutes, filter with suction, wash, and dry the product in a blast drying oven at 80°C to obtain a precursor Material;

[0042] S3. Put the precursor material in a tube furnace, raise the temperature of the tube furnace at a rate of 30°C / min, raise the temperature to 650°C, sinter in the air for 4 hours, cool to room temperature with the furnace, and discharge the material to prepare Get coat...

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Abstract

The invention discloses a method for preparing a transition metal oxide composite electrode for a lithium battery, and the method comprises the following steps: S1, taking nickel nitrate hexahydrate,iron nitrate nonahydrate and metal oxide as raw materials, and obtaining a mixed solution; S2, performing alkalizing and drying to obtain a precursor material; S3, sintering the precursor material ina tubular furnace to obtain a coated material; S4, taking Nmethyl pyrrolidone as a solvent and taking polyvinylidene fluoride as a binder to prepare the composite electrode. According to the invention, the self-made coating material is used as the main substance of the motor, and the ferronickel compound is used as the coating layer, so the lithium manganate base material is protected from being corroded by electrolyte, the cycle performance of the motor is improved, the transmission rate of ions or electrons can be improved to a certain extent, and the electrochemical performance of the material is improved; the preparation method disclosed by the invention is simple and convenient, easy to operate and suitable for large-scale production, and a battery assembled by adopting the electrodematerial is high in specific capacity and excellent in cycle performance.

Description

technical field [0001] The invention belongs to the field of lithium battery processing, and in particular relates to a method for preparing a transition metal oxide composite electrode for a lithium battery. Background technique [0002] Lithium batteries have high energy density, large output power, high average output voltage, small self-discharge, no memory effect, fast charge and discharge, excellent cycle performance, and no environmental pollution. They have become the first choice for rechargeable sources of portable electronic products today. , is considered to be the most promising chemical power source. In lithium batteries, electrode materials occupy the most important position, and the performance of electrode materials directly determines the performance indicators of the final lithium battery product. Using transition metal oxides as electrode materials for lithium batteries has excellent voltage platform and specific capacity. However, it is difficult for o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/58H01M4/62H01M4/1391H01M4/1397H01M4/04H01M10/052
CPCH01M4/0404H01M4/0433H01M4/1391H01M4/1397H01M4/362H01M4/505H01M4/525H01M4/5825H01M4/62H01M4/624H01M4/628H01M10/052Y02E60/10
Inventor 卢山龙朱建楠叶明刚孙朝军
Owner 安徽南都华铂新材料科技有限公司
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