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Preparation method of Mn3O4/RGO nanocomposite used as anode material of lithium ion battery

A technology of nanocomposite materials and lithium-ion batteries, applied in nanotechnology for materials and surface science, battery electrodes, nanotechnology, etc., can solve problems such as low specific capacitance, inability to meet commercial application requirements, and poor cycle stability

Inactive Publication Date: 2016-04-20
SHANGHAI UNIV
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Problems solved by technology

However Mn 3 o 4 The low conductivity hinders its further development and application, and its complex synthesis process, low specific capacitance and poor cycle stability are far from meeting the needs of commercial applications. Therefore, a simple method to synthesize Mn with good electrochemical performance 3 o 4 The application of composite materials in lithium-ion batteries has increasingly attracted the attention of researchers

Method used

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  • Preparation method of Mn3O4/RGO nanocomposite used as anode material of lithium ion battery
  • Preparation method of Mn3O4/RGO nanocomposite used as anode material of lithium ion battery
  • Preparation method of Mn3O4/RGO nanocomposite used as anode material of lithium ion battery

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Embodiment

[0025] 1. Dissolve 2.5g of potassium persulfate and phosphorus pentoxide in 20ml of concentrated sulfuric acid and heat it to 80°C, then add 3g of natural graphite to the above solution and keep it at constant temperature for 4h;

[0026] 2. Cool to room temperature, dilute with 350ml of deionized water, and let stand overnight; wash, filter with suction, and dry in a vacuum oven at 60°C;

[0027] 3. Add the obtained precursor to 120ml of ice-bath concentrated sulfuric acid, and slowly add 15g of KMnO under stirring 4 , Keep the temperature at 0~5℃ during the process of adding; then control the temperature at 35℃ and stir until fully reacted

[0028] 4. Add 250ml of deionized water to dilute. During the dilution, keep the temperature below 30℃ in an ice bath; after stirring, add sufficient deionized water and immediately add 20ml of 30% H 2 O 2 , The mixture produces bubbles and the color becomes bright yellow;

[0029] 5. The above mixture was suction filtered and washed with 1L o...

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Abstract

The invention relates to a preparation method of Mn3O4 / RGO nanocomposite used as an anode material of a lithium ion battery and belongs to the field of composite functional materials. The preparation method is simple in operation, mild, controllable, energy-saving and environment-friendly. The preparation method mainly comprises steps as follows: oxidized graphene is prepared with an improved Hummers method, then the oxidized graphene and manganese acetate tetrahydrate have a reaction with a hydrothermal method, and the Mn3O4 / RGO nanocomposite with excellent performance is directly prepared. The preparation process is simple, tests show that the crystallinity of Mn3O4 in the Mn3O4 / RGO composite is improved, and the Mn3O4 / RGO nanocomposite serving as the anode material of the lithium ion battery has good electrochemical performance due to the synergistic effect of the oxidized graphene and manganese acetate tetrahydrate. The product has potential application value in the field of composite functional materials, especially in the fields of energy storage of a lithium ion battery, a capacitor and the like.

Description

Technical field [0001] The present invention relates to the application of an improved Hummers method to prepare graphene oxide, and then the hydrothermal method is used to react the graphene oxide with manganese acetate tetrahydrate to prepare Mn with excellent performance. 3 O 4 / RGO nanocomposite material can be used as a negative electrode material for lithium-ion batteries and belongs to the field of nanocomposite functional materials. Background technique [0002] In transition metal oxides, Mn 3 O 4 Because of its high efficiency, good stability, high output, low cost, environmental friendliness and wide potential window in aqueous solution, it has become the most promising material for supercapacitors and lithium-ion batteries. However Mn 3 O 4 Its low conductivity hinders its further development and application. Its complex synthesis process, low specific capacitance and poor cycle stability are far from meeting the needs of commercial applications. Therefore, a simple me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/50H01M4/587H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/364H01M4/50H01M4/587H01M10/0525Y02E60/10
Inventor 陈志文苗纯杰侯凌癸胡志翔任兰兰郜子明董敬余
Owner SHANGHAI UNIV
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