Ni-Mn layered double hydroxide@nickel foam@carbon three-dimensional hierarchically-structured electrode material and preparation method thereof

A hydroxide and electrode material technology, applied in the field of materials science, can solve the problems of poor LDH conductivity and the use of adhesives, and achieve the effects of overcoming poor conductivity and cycle performance, simple equipment, and rich raw material sources.

Inactive Publication Date: 2016-06-08
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method can solve the disadvantages of poor electrical conductivity of the double-layer metal hydroxide LDH in t

Method used

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  • Ni-Mn layered double hydroxide@nickel foam@carbon three-dimensional hierarchically-structured electrode material and preparation method thereof
  • Ni-Mn layered double hydroxide@nickel foam@carbon three-dimensional hierarchically-structured electrode material and preparation method thereof
  • Ni-Mn layered double hydroxide@nickel foam@carbon three-dimensional hierarchically-structured electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of a Ni-MnLDHNFC three-dimensional hierarchical structure electrode material, comprising the steps of:

[0034] (1) The pretreatment step of nickel foam is to cut the nickel foam into the shape of 1cm × 3cm × 1cm, ultrasonically wash with deionized water, acetone, ethanol and deionized water successively for 15min, then wash twice with deionized water, Then vacuum-dry at 60° C. for 12 hours; specifically, the mass percent concentration of the acetone is 60-98%, and the ethanol is absolute ethanol.

[0035] (2) A step for preparing Ni-MnLDH, at room temperature, according to the molar ratio of 9:2:10:5, nickel chloride hexahydrate, anhydrous manganese chloride, cyclohexamethylenetetramine, deionized Add water into a container, stir magnetically for 30-40 minutes until the mixture is completely uniform, and then move it into a polytetrafluoroethylene-lined stainless steel high-pressure reactor; Put it in an oven at 85°C for 6 hours; then cool it down...

Embodiment 2

[0039] A kind of preparation method of Ni-MnLDHNFC three-dimensional hierarchical structure electrode material, comprises the following steps: (1) the pretreatment step of nickel foam, the nickel foam is cut into the shape of 1cm * 3cm * 1cm, successively with deionized water, acetone, ethanol 1. Ultrasonic washing with deionized water for 15 minutes each, and then washing twice with deionized water, and then vacuum drying at 60°C for 12 hours;

[0040](2) A step for preparing Ni-MnLDH, at room temperature, according to the molar ratio of 8:2:10:5, nickel chloride hexahydrate, anhydrous manganese chloride, cyclohexamethylenetetramine and deionized water Add it into a container, stir magnetically for 30-40min until the mixture is completely uniform, and then transfer it into a polytetrafluoroethylene-lined stainless steel high-pressure reactor; Put it into a 95°C oven to react for 6 hours; take it out and cool it down to room temperature naturally, and wash the nickel foam with...

Embodiment 3

[0044] A preparation method of a Ni-MnLDHNFC three-dimensional hierarchical structure electrode material, comprising the steps of:

[0045] (1) The pretreatment step of nickel foam is to cut the nickel foam into the shape of 1cm × 3cm × 1cm, ultrasonically wash with deionized water, acetone, ethanol and deionized water successively for 15min, then wash twice with deionized water, Then vacuum dry at 60°C for 12 hours;

[0046] (2) A step for preparing Ni-MnLDH, at room temperature, according to the molar ratio of 10:2:10:5, nickel chloride hexahydrate, anhydrous manganese chloride, cyclohexamethylenetetramine, deionized water Add it into a container according to the molar ratio of 10:2:10:5, stir magnetically for 30-40min until the mixture is completely uniform, and then transfer it into a polytetrafluoroethylene-lined stainless steel autoclave; then pretreat the foam obtained in step 1) Nickel is placed in the reactor at a slant, tightened and placed in an oven at 85°C for 6 ...

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Abstract

The invention discloses a Ni-Mn layered double hydroxide@nickel foam@carbon three-dimensional hierarchically-structured electrode material and a preparation method thereof. The preparation method comprises the following steps: firstly carrying out one-step hydrothermal treatment by respectively taking nickel chloride hexahydrate, anhydrous manganese chloride and nickel foam as a nickel source, a manganese source and a substrate, so as to obtain Ni-Mn LDH@NF; and coating Ni-Mn LDH@NF by virtue of glucose or graphene as a carbon source, and carrying out hydrothermal treatment, so as to obtain Ni-Mn LDH@NF@C. According to the preparation method, by virtue of a stepwise hydrothermal-drying method, the preparation process and the required equipment are simple, raw material sources are rich, the reaction temperature is relatively low, the high temperature carbonization is not needed, and the large-scale production is easy to realize; and the Ni-Mn LDH@NF@C composite material is good in thermal stability, high in crystalline degree, large in specific surface area and strong in shape controllability and is one of ideal energy source materials.

Description

technical field [0001] The invention belongs to the technical field of materials science, and relates to a three-dimensional hierarchical structure composite electrode material, specifically a Ni-Mn layered double hydroxide foamed nickel carbon (Ni-MnLDHNFC) three-dimensional hierarchical structure electrode material and a preparation method thereof . Background technique [0002] The progress of the development of human society and the increase of energy demand have led to the supply and demand crisis of traditional fossil energy and the deterioration of the environment. Environmental problems such as acid rain and greenhouse gases have become increasingly prominent. It is urgent for people to continuously seek new clean energy. The emergence of supercapacitors and lithium batteries conforms to people's demand for new clean and renewable energy sources (such as solar energy, wind energy, biomass energy, geothermal energy, and tidal energy, etc.). Due to its long cycle life...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/32H01M4/36H01M4/38H01M4/50H01M4/52H01M4/587H01M10/0525
CPCH01G11/24H01G11/30H01G11/32H01G11/86H01M4/366H01M4/38H01M4/502H01M4/523H01M4/587H01M10/0525Y02E60/10
Inventor 韩生杨德山陈红艳蔺华林艾亚妮刘凡常兴王驰薛原黄奇李勇
Owner SHANGHAI INST OF TECH
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