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Preparation method of carbon coated MnO cathode material

A negative electrode material and carbon coating technology, applied in the field of electrochemistry, can solve problems such as expensive raw materials, unsuitable for industrial production, and difficult reaction control, etc., and achieve simple and easy preparation methods, low equipment requirements, and short time-consuming Effect

Inactive Publication Date: 2013-05-22
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw materials of this method are expensive, and MnO is easily oxidized to Mn during heat treatment under air atmosphere conditions. 3 o 4 , the reaction is not easy to control, not suitable for industrial production

Method used

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  • Preparation method of carbon coated MnO cathode material
  • Preparation method of carbon coated MnO cathode material
  • Preparation method of carbon coated MnO cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Prepare NaHCO with a concentration of 0.15mol / L 3 solution, the solvent is water; under the condition of constant stirring, an equal volume is added to the concentration of 0.015mol / L MnSO 4 solution, and add 0.015mol / L (NH 4 ) 2 SO 4 solution, stirred and reacted for 7 hours, and the resulting solid precipitate was dried to obtain MnCO 3 Prebody.

[0021] 2) Combine sucrose with the resulting MnCO 3 The precursor was mixed according to a mass ratio of 1:5, dried after ball milling for 8 hours, and the resulting powder was placed in H 2 / Ar (volume 5%H 2 ) in an atmosphere at 600°C for 6h.

Embodiment 2

[0023] 1) Prepare NaHCO with a concentration of 0.15mol / L 3 solution, the solvent is PEG-200 (polyethylene glycol 200); under constant stirring conditions, an equal volume is added to the MnSO with a concentration of 0.015mol / L 4 solution, and add 0.015mol / L (NH 4 ) 2 SO 4 solution, stirred and reacted for 7 hours, and the resulting solid precipitate was dried to obtain MnCO 3 Prebody.

[0024] 2) Combine sucrose with the resulting MnCO 3 The precursor was mixed according to a mass ratio of 1:5, dried after ball milling for 8 hours, and the resulting powder was placed in H 2 / Ar (volume 5%H 2 ) in an atmosphere at 600°C for 6h.

Embodiment 3

[0026] 1) Prepare NaHCO with a concentration of 0.2mol / L 3 solution, the solvent is PEG-200 (polyethylene glycol 200); under constant stirring conditions, an equal volume is added to the MnSO with a concentration of 0.02mol / L 4 solution, and add 0.015mol / L (NH 4 ) 2 SO 4 solution, stirred and reacted for 10 hours, and the resulting solid precipitate was dried to obtain MnCO 3 Prebody.

[0027] 2) Combine sucrose with the resulting MnCO 3 The precursor was mixed according to a mass ratio of 1:5, dried after ball milling for 8 hours, and the resulting powder was placed in H 2 / Ar (volume 5%H 2 ) in an atmosphere at 600°C for 6h.

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Abstract

The invention discloses a preparation method of a carbon coated MnO cathode material, and belongs to the field of electrochemistry. The method comprises the following steps of: preparing 0.1 to 0.2mol / L NaHCO3 solution, wherein the solvent is water or PEG-200; adding the NaHCO3 solution into 0.01 to 0.02mol / L MnSO4 solution in equal volume with stirring, adding 0.015mol / L (NH4)2SO4 into the mixture, reacting for 5 to 10 hours with stirring, and precipitating and drying the obtained solid to obtain an MnCO3 precursor; and mixing sucrose or glucose and the obtained MnCO3 precursor in a mass ratio of 1: (5-10), performing ball milling for 8 hours, drying, and reacting the obtained powder for 6 hours at the temperature of 600 DEG C in the H2 / Ar atmosphere. The method is simple, feasible, cheap and facile in raw materials, low in equipment requirement, low in energy consumption and short in time consumption; and the obtained product has good cyclical stability and high specific capacity.

Description

technical field [0001] The invention relates to a preparation method of a negative electrode material of a lithium ion battery, in particular to a preparation of a nano-oxide composite material, which belongs to the field of electrochemistry. Background technique [0002] Lithium-ion battery is currently a portable chemical power source with the highest specific energy. It has the advantages of high output voltage, stable discharge voltage, high energy density, low self-discharge rate, and long storage and working life. With the rapid development of the miniaturization and miniaturization of today's electronic equipment, the research and application of lithium-ion batteries are getting more and more attention. The positive and negative electrode materials of lithium-ion batteries are important factors that determine the battery capacity and safety. The current commercial negative electrode materials are mainly graphitized carbon negative electrodes. The theoretical capacity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1391
CPCY02E60/10
Inventor 刘雅敏夏定国沈雪玲刘淑珍
Owner BEIJING UNIV OF TECH