Graphene coupling flower-ball Ni-Mn bimetal oxide three-dimensional class structure electrode material and preparation method thereof

A technology of double metal oxides and electrode materials, applied in the field of material chemistry, can solve the problems of poor conductivity and easy agglomeration of double metal oxides, and achieves overcoming poor cycle performance, overcoming easy agglomeration, and shape controllability. strong effect

Active Publication Date: 2016-12-14
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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Problems solved by technology

The method is environmentally friendly, and the obtained graphene-coupled flower spherical Ni-Mn double metal oxide three-dimensional hierarchical structure electrode

Method used

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  • Graphene coupling flower-ball Ni-Mn bimetal oxide three-dimensional class structure electrode material and preparation method thereof
  • Graphene coupling flower-ball Ni-Mn bimetal oxide three-dimensional class structure electrode material and preparation method thereof
  • Graphene coupling flower-ball Ni-Mn bimetal oxide three-dimensional class structure electrode material and preparation method thereof

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[0034] Example 1

[0035] A graphene-coupled flower spherical Ni-Mn bimetal oxide three-dimensional hierarchical structure electrode material and a preparation method thereof, including the following steps:

[0036] (1) Preparation of graphene oxide.

[0037] a. Add 5g graphite flakes and 3.75g NaNO to a 1L beaker 3 Crystals, and add 100ml concentrated sulfuric acid, stir with a mechanical stirrer for one hour until graphite and NaNO 3 well mixed;

[0038] b. Weigh 20g potassium permanganate, slowly add it to the above mixture within one hour, and let it react for 5 days;

[0039] c. After the reaction is over, add 500ml of deionized water to the system, stir for 2h and slowly add 30ml of 30% hydrogen peroxide, and react for 2h;

[0040] d. Centrifuge the above product at 10000rpm for 3 to 5 times to remove impurities in the upper layer to obtain the bottom layer deposit;

[0041] e. Centrifuge the sediment at 7000rpm to remove the upper layer impurities, collect the golden yellow translu...

Example Embodiment

[0055] Example 2

[0056] A graphene-coupled flower spherical Ni-Mn bimetal oxide three-dimensional hierarchical structure electrode material and a preparation method thereof, including the following steps:

[0057] (1) Preparation of graphene oxide.

[0058] (2) Preparation of graphene oxide sponge (GOS)

[0059] a. First, at room temperature, the graphene oxide (GO) dispersion solution is subjected to ultrasonic treatment, and a 2mol / l GO solution is obtained after 50 minutes of ultrasonication;

[0060] b. Then move the above-mentioned mixed solution into a beaker, and freeze-dry the obtained sample in a freeze dryer for 2 days. After drying, it is GOS;

[0061] (3) Synthesis of graphene-coupled flower spherical Ni-Mn bimetallic oxide (LGS)

[0062] a. First of all, NiCl 2 ·6H 2 O(350mg), MnCl 2 (70mg), NH 4 F (90mg) and cyclohexamethylenetetramine (HMT) (900mg) were dissolved in deionized water (40ml), and a green solution was formed under magnetic stirring for a period of time;

[006...

Example Embodiment

[0068] Example 3

[0069] A graphene-coupled flower spherical Ni-Mn bimetal oxide three-dimensional hierarchical structure electrode material and a preparation method thereof, including the following steps:

[0070] (1) Preparation of graphene oxide.

[0071] (2) Preparation of graphene oxide sponge (GOS)

[0072] a. First, at room temperature, the graphene oxide (GO) dispersion solution is subjected to ultrasonic treatment, and a 4mol / l GO solution is obtained after ultrasonication for 50 minutes;

[0073] b. Then move the above-mentioned mixed solution into a beaker, and freeze-dry the obtained sample in a freeze dryer for 2 days. After drying, it is GOS;

[0074] (3) Synthesis of graphene-coupled flower spherical Ni-Mn bimetallic oxide (LGS)

[0075] a. First of all, NiCl 2 ·6H 2 O(350mg), MnCl 2 (70mg), NH 4 F (95mg) and cyclohexamethylenetetramine (HMT) (900mg) were dissolved in deionized water (50ml), and a green solution was formed under magnetic stirring for a period of time;

[00...

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Abstract

The invention discloses a graphene coupling flower-ball Ni-Mn bimetal oxide three-dimensional class structure electrode material and a preparation method thereof. The method disclosed by the invention comprises the steps of firstly obtaining graphene sponge (GOS) through freeze drying; carrying out hydrothermal composition on a nickel source, a manganese source and the graphene sponge (GOS); and finally carrying out high-temperature calcination to obtain a graphene coupling flower-ball Ni-Mn bimetal oxide (LGS). The graphene coupling flower-ball Ni-Mn bimetal oxide three-dimensional composite material obtained by a hydrothermal method, a freeze drying method and a high-temperature calcination method is good in thermal stability, high in crystallinity and high in shape and form controllability, and is an ideal energy material.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and relates to a three-dimensional hierarchical structure composite electrode material, in particular to a three-dimensional hierarchical structure electrode material of a graphene-coupled curdled Ni-Mn double metal oxide and a preparation method thereof. Background technique [0002] With the rapid development of the economy, traditional non-renewable energy sources such as oil, natural gas, and coal are increasingly depleted, and at the same time, a large amount of pollution is generated in the process of production and utilization of them, making energy and the environment two major themes in the sustainable development of human beings . Seeking renewable and clean energy is crucial to reducing environmental pollution and promoting sustainable development of human beings. At present, the development momentum of renewable clean energy represented by solar energy is good, and it has ...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/24H01G11/46H01G11/32H01M4/36H01M4/50H01M4/52H01M4/62H01M10/0525
CPCH01G11/24H01G11/32H01G11/46H01G11/86H01M4/364H01M4/50H01M4/52H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 蔺华林陈达明陈红艳常兴韩生刘平赵志成周嘉伟薛原许广文
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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