Layered double hydroxide composite electrode material and preparation method and application thereof

A technology of hydroxide and composite electrodes, applied in the direction of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, nanotechnology for materials and surface science, etc., can solve the limitations of practical applications, short cycle life, and low conductivity and other problems, to achieve the effect of more effective active sites, high specific capacitance, and high energy density

Active Publication Date: 2019-03-01
合肥九州龙腾科技成果转化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

NiMn-LDH has relatively high capacitance and fast redox kinetics, but because of its own low conductivity, low compatibility in organic electrolytes, and short cycle life, it limits its use in pseudocapacitive Practical Applications of Materials

Method used

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  • Layered double hydroxide composite electrode material and preparation method and application thereof
  • Layered double hydroxide composite electrode material and preparation method and application thereof
  • Layered double hydroxide composite electrode material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A preparation of a nickel-foamed cobalt manganate / nickel-manganese layered double hydroxide composite electrode material and research on its properties, comprising the following steps:

[0039] (1) Dissolve cobalt nitrate hexahydrate, manganese chloride tetrahydrate, ammonium fluoride and urea in 40 mL of deionized water, the mass of cobalt salt in the solution is 0.218g, the mass of manganese salt is 0.296g, and the mass of ammonium fluoride is 0.218g. Be 0.036g, the quality of urea is 0.72, stir and dissolve to obtain dispersion liquid 1;

[0040] (2) The dispersion liquid 1 configured in step (1) is transferred to the reactor, and the nickel foam (8 cm 2), hydrothermally reacted at 140 °C for 4 h. The resulting CoMn on nickel foam 2 O 4 The precursors were washed three times with deionized water and ethanol, respectively, and dried under vacuum at 60 °C for 5 h;

[0041] (3) the CoMn based on the nickel foam of step (2) gained 2 O 4 The precursor is heat-treate...

Embodiment 2

[0047] A preparation of a nickel-foamed cobalt manganate / nickel-manganese layered double hydroxide composite electrode material and research on its properties, comprising the following steps:

[0048] The preparation method of the cobalt manganate / nickel-manganese layered double hydroxide composite electrode material with nickel foam as the base is basically the same as that in Example 1, the difference is that the NiCl in step 4 of Example 1 is used. 2 ·6H 2 The mass of O was changed to 0.476 g, and other conditions remained unchanged. The material is named Ni 2 Mn 1 -LDH-CoMn 2 O 4 -NF.

Embodiment 3

[0050] A preparation of a nickel-foamed cobalt manganate / nickel-manganese layered double hydroxide composite electrode material and research on its properties, comprising the following steps:

[0051] The preparation method of the cobalt manganate / nickel-manganese layered double hydroxide composite electrode material with nickel foam as the base is basically the same as that in Example 1, the difference is that the NiCl in step 4 of Example 1 is used. 2 ·6H 2 The mass of O was changed to 0.714 g, and other conditions remained unchanged. The material is named Ni 3 Mn1-LDH-CoMn 2 O 4 -NF.

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Abstract

The invention belongs to the technical field of fabrication of a supercapacitor electrode material, and particularly relates to a layered double hydroxide composite electrode material and preparationmethod and application thereof. Nanometer needle-shaped cobalt manganate taking foamed nickel as a substrate is prepared and obtained by a hydrothermal method and a calcination method, and then a nanosheet is formed on a surface of the nanometer needle-shaped cobalt manganate by a secondary hydrothermal method. The electrochemical activity is favorably and fully developed. The composite electrodematerial can be used as a pseudocapacitor electrode material when used as a supercapacitor electrode material, and has relatively high specific capacity and rate charge-discharge performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of supercapacitor electrode materials, in particular to a cobalt manganate / nickel-manganese layered double hydroxide composite electrode material based on nickel foam, a preparation method and application thereof. Background technique [0002] Supercapacitors, as a new type of energy storage and conversion device, mainly rely on redox pseudocapacitors and electric double layers to store electrical energy. Its capacitance is as high as tens of thousands of farads, which can realize fast charge and discharge and high current power generation, and has higher power than lithium batteries. High power density and longer cycle life, and can be used in extremely harsh environments such as high and low temperature, without any environmental pollution, can be widely used in consumer electronics, new energy vehicles and other transportation fields, electromagnetic bombs, electromagnetic guns, etc. Pulse ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/46H01G11/86B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 陈敏王银涛徐箐姜德立孟素慈李娣
Owner 合肥九州龙腾科技成果转化有限公司
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