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A kind of three-dimensional hierarchical structure electrode material of graphene coupling flower spherical Ni-MN double metal oxide and preparation method thereof

A double-metal oxide and electrode material technology, applied in the field of material chemistry, can solve problems such as easy agglomeration and poor conductivity of double-layer metal oxides, and achieve the effects of overcoming easy agglomeration, poor cycle performance, and high specific capacitance

Active Publication Date: 2018-09-14
SHANGHAI INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 material can solve the shortcomings of the double-layer metal oxide in the prior art, such as poor conductivity and easy agglomeration, and has good cycle stability

Method used

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  • A kind of three-dimensional hierarchical structure electrode material of graphene coupling flower spherical Ni-MN double metal oxide and preparation method thereof
  • A kind of three-dimensional hierarchical structure electrode material of graphene coupling flower spherical Ni-MN double metal oxide and preparation method thereof
  • A kind of three-dimensional hierarchical structure electrode material of graphene coupling flower spherical Ni-MN double metal oxide and preparation method thereof

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Effect test

Embodiment 1

[0035] A graphene-coupled curd-shaped Ni-Mn double metal oxide three-dimensional hierarchical structure electrode material and a preparation method thereof, comprising the steps of:

[0036] (1) Preparation of graphene oxide.

[0037] a. Add 5g of graphite flakes and 3.75g of NaNO to a 1L beaker 3 crystals, and added 100ml of concentrated sulfuric acid, stirred with a mechanical stirrer for an hour until the graphite and NaNO 3 well mixed;

[0038] b. Take by weighing 20g potassium permanganate, slowly add in the above-mentioned mixture within one hour, allow it to react for 5 days;

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

[0040] d. Centrifuge the above product at 10,000 rpm for 3 to 5 times to remove the impurities in the upper layer and obtain the bottom sediment;

[0041] e. Centrifuge the sediment at 7000rpm to remove the upper impurities...

Embodiment 2

[0056] A graphene-coupled curd-shaped Ni-Mn double metal oxide three-dimensional hierarchical structure electrode material and a preparation method thereof, comprising the steps of:

[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 2mol / l GO solution is obtained after ultrasonic 50min;

[0060] b. Then transfer the above mixed solution into a beaker, and freeze-dry the obtained sample in a lyophilizer for 2 days, and it will be GOS after drying;

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

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

[0063] b. Then transfer the ...

Embodiment 3

[0069] A graphene-coupled curd-shaped Ni-Mn double metal oxide three-dimensional hierarchical structure electrode material and a preparation method thereof, comprising the steps of:

[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 4mol / l GO solution is obtained after ultrasonic 50min;

[0073] b. Then transfer the above mixed solution into a beaker, and freeze-dry the obtained sample in a lyophilizer for 2 days, and it will be GOS after drying;

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

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

[0076] b. Then transfer the ...

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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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Patent Type & Authority Patents(China)
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 INST OF TECH
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