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Graphene and MoO2 nanometer composite material, preparation method and lithium ion battery negative material

A nanocomposite material and graphene technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of electrode material pulverization, poor cycle performance, and shedding

Inactive Publication Date: 2013-02-13
三亚哈尔滨工程大学南海创新发展基地
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the huge volume change during lithium intercalation and desorption of these materials causes the electrode material to pulverize and fall off from the current collector, so its cycle performance is poor.

Method used

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  • Graphene and MoO2 nanometer composite material, preparation method and lithium ion battery negative material
  • Graphene and MoO2 nanometer composite material, preparation method and lithium ion battery negative material
  • Graphene and MoO2 nanometer composite material, preparation method and lithium ion battery negative material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) First, graphene is prepared by chemical methods; the specific method is: add ethanol and metal sodium into the autoclave at the same time, react at 220 degrees Celsius for 72 hours, calcinate the obtained product in the air, and wash it with distilled water and ethanol. Prepare graphene;

[0029] (2) Secondly, the ammonium molybdate was calcined in the air at 500 degrees Celsius for 4 hours to prepare MoO 3 particles;

[0030] (3) Finally, combine graphene with MoO 3 Graphene / MoO was prepared by ball milling the particles at a molar ratio of 1:2 under the protection of argon with a ball-to-material ratio of 15:1 and a speed of 600-800 rpm for 10 hours 2 nanocomposites.

Embodiment 2

[0032] (1) First, graphene is prepared by chemical methods;

[0033] (2) Secondly, the ammonium molybdate was calcined in the air at 500 degrees Celsius for 4 hours to prepare MoO 3 particles;

[0034] (3) Finally, combine graphene with MoO 3 Graphene / MoO was prepared by ball-milling the particles at a molar ratio of 1:1 under the protection of argon with a ball-to-material ratio of 15:1 and a speed of 600-800 rpm for 10 hours. 2 nanocomposites.

Embodiment 3

[0036] (1) First, prepare graphene by chemical method;

[0037] (2) Secondly, the ammonium molybdate was calcined in the air at 500 degrees Celsius for 4 hours to prepare MoO 3 particles;

[0038] (3) Finally, combine graphene with MoO 3 Graphene / MoO was prepared by ball milling the particles at a molar ratio of 2:1 under the protection of argon with a ball-to-material ratio of 15:1 and a speed of 600-800 rpm for 10 hours 2 nanocomposites.

[0039] The prepared graphene and MoO 2The nanocomposite material, conductive carbon and CMC are mixed according to 8:1:1 to prepare the lithium ion battery negative electrode, which has high specific capacity and stability.

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Abstract

The invention provides a graphene and MoO2 nanometer composite material, a preparation method and a lithium ion battery negative material. The preparation method comprises the following steps of: (1) preparing the graphene by using a chemical method; (2) calcining ammonium molybdate for 4 hours in air at the temperature of 500 DEG C so as to obtain MoO3 grains; (3) mixing the graphene with the MoO3 grains in a molar ratio of (1:2)-(2:1); and (4) carrying out ball milling in ball material ratio of 15-1, so as to obtain the graphene and MoO3 nanometer composite material. The graphene and MoO2 nanometer composite material provided by the invention is mainly used for preparing a lithium ion battery negative electrode. The composite material provided by the invention has good lithium storage and reversible embedding stripping characteristics, and the lithium ion battery negative material has higher cycling life and specific capacity; and the method provided by the invention is simple, the output is plenty, and the method is suitable for industrial production.

Description

technical field [0001] What the present invention relates to is a kind of nanocomposite material, specifically a kind of graphene and MoO 2 nanocomposites. The present invention also relates to a kind of containing graphene and MoO 2 Nanocomposite lithium-ion battery anode materials. Background technique [0002] The extensive use of fossil fuels has led to the greenhouse effect. With the increasing urgency of global warming, energy conservation and emission reduction has become the focus and theme of the world today. In order to reduce dependence on petroleum energy and carbon dioxide emissions, many countries have increased research and investment in hybrid electric vehicles and electric vehicles, and put forward higher requirements for the energy density, especially power density, of lithium-ion batteries, the main power supply equipment. Require. Compared with traditional secondary batteries such as lead-acid batteries, Ni / Cd batteries, and Ni / MH batteries, lithium-i...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M4/48
CPCY02E60/12Y02E60/10
Inventor 陈玉金王铁石俞海龙李丽高新明朱春玲
Owner 三亚哈尔滨工程大学南海创新发展基地
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