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Carbon-coated oxide electrode material and preparation method thereof

An electrode material and oxide technology, applied in the field of material synthesis and electrochemistry, can solve the problems of poor battery rate performance, high resistivity, and large volume change, and achieve the effects of uniform coating, low cost, and reduced volume change.

Inactive Publication Date: 2019-10-08
北京金羽新能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, metal oxide electrode materials also have problems such as large volume changes and large resistivity during the charge a

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix manganese dioxide and conductive carbon black at a mass ratio of 9:1, add ethanol as an organic solvent, the mass ratio of the ball to material is 10:1, the speed of the main machine is 1000r / min, after ball milling for 5 hours, then place it at a temperature of 80°C dry. The obtained material was placed in an atmosphere furnace, and sintered at 900° C. for 10 h in an argon atmosphere at a heating rate of 5° C. / min to obtain a manganese dioxide / C composite material.

[0028] The carbon-coated manganese dioxide oxide has good crystal behavior, and the main particle size of the material is 50-100 nm, and the distribution is uniform. ( figure 1 )

Embodiment 2

[0030] Mix manganese dioxide and 1500 mesh expanded graphite powder with a mass ratio of 8:1, add isopropylamine as an organic solvent, the mass ratio of the ball to material is 10:1, the speed of the main engine is 700r / min, after ball milling for 10h, then place it at 80 Dry at ℃ temperature. The obtained material was placed in an atmosphere furnace, and sintered at 1000° C. for 10 h in an argon atmosphere at a heating rate of 5° C. / min to obtain a manganese dioxide / C composite material.

[0031] The carbon-coated manganese dioxide oxide has good crystal behavior, the main particle size is 50-100 nm and 0.5-0.8 μm, and the distribution is relatively uniform. ( figure 2 )

Embodiment 3

[0033] Mix manganese dioxide and 5000-mesh expanded graphite powder at a mass ratio of 9:1, add acetone as an organic solvent, the mass ratio of the ball to material is 10:1, the speed of the host machine is 500r / min, ball mill for 2 hours, and then place at 80°C Dry at room temperature. The obtained material was placed in an atmosphere furnace, and sintered at 1000° C. for 10 h in an argon atmosphere at a heating rate of 5° C. / min to obtain a manganese dioxide / C composite material.

[0034] The carbon-coated manganese dioxide oxide has good crystal behavior, the main particle size is 50-100nm, and the sheets of expanded graphite can be seen, and the distribution is relatively uniform. ( image 3 )

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Abstract

The invention discloses an oxide electrode material/C composite material and a preparation method thereof. The composite material is composed of a carbon layer-coated oxide electrode material. The synthesis method uses a carbon source and an oxide as raw materials, and the carbon-coated oxide electrode material with excellent properties is synthesized through a solid phase method. The preparationmethod is uniform in coating, simple and easy to operate, high in yield and low in cost. Through the method, the conductivity of the oxide electrode material is remarkably increased and the environmental stability is also remarkably improved.

Description

technical field [0001] The invention relates to a battery electrode material, in particular to a carbon-coated oxide electrode material and a method for solid-phase synthesis of an oxide electrode material / C composite material, belonging to the fields of material synthesis and electrochemistry. Background technique [0002] Resource shortage and environmental damage are the two severe challenges that human beings face in the 21st century. With the continuous development of the world economy, the resources that can be exploited and utilized by human beings are decreasing day by day, and the ecological environment is gradually deteriorating. Therefore, people pay more and more attention to the development and utilization of new energy. Exploring clean and pollution-free new energy and new energy materials has become an important strategic choice for the sustainable development of society. Energy sources such as solar energy, wind energy, and nuclear energy are gradually being...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/62H01M4/50
CPCH01M4/366H01M4/50H01M4/625H01M4/628Y02E60/10
Inventor 李爱军黄杜斌田波姚俊超高雪鑫杨扬
Owner 北京金羽新能科技有限公司
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