Preparation and application of NiO/C composite electrode material taking foamed nickel sheet as substrate

A nickel foam sheet and composite material technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve problems such as peeling and poor cycle performance, and achieve simple and easy operation, reduce electrode impedance, and ease volume The effect of swelling

Active Publication Date: 2021-08-06
SHANDONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0006] In order to solve the problems of exfoliation and poor cycle performance of coating active materials on the surface of transition metal oxide nano-scale particles in the prior art, the present invention proposes the preparation and application of a NiO / C composite electrode material based on foamed nickel sheet , the NiO / C composite material was prepared on the foamed nickel sheet, and the NiO / C composite material was loaded on the foamed nickel sheet in situ by the method of first oxidation and then coating carbonization. Compared with the granular transition metal oxide coating active material, this The combination of NiO and C on the nickel foam sheet prepared by the invention is more tightly combined, and the NiO / C composite material based on the nickel foam sheet can be directly used as an electrode material without additional coating operations

Method used

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  • Preparation and application of NiO/C composite electrode material taking foamed nickel sheet as substrate
  • Preparation and application of NiO/C composite electrode material taking foamed nickel sheet as substrate
  • Preparation and application of NiO/C composite electrode material taking foamed nickel sheet as substrate

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preparation example Construction

[0028] The first aspect of the present invention provides a method for preparing a NiO / C composite material based on a nickel foam sheet, which includes: calcining the nickel foam sheet, coating PDA, and carbonizing it.

[0029] Since the present invention generates NiO in situ on the foamed nickel sheet, the surface of NiO is coated with active materials. For NiO, under the support of the foamed nickel sheet and the coating of the active material, the upper and lower forces are balanced, and NiO and the active material They are all distributed in a plane, and the two phases are more tightly combined, which solves the problems of uneven stress and poor bonding effect of the active material coated on the surface of a single particle. Excellent cycle performance, lower impedance.

[0030] In one or more embodiments of the present invention, the calcination temperature is 550-900°C, and the calcination time is 0.5-3h, preferably 650°C, 2h. In this process, without adding any rea...

Embodiment 1

[0050] Use untreated nickel foam sheet; set the heating rate in the muffle furnace to 5°C / min, keep it at 650°C for 2h, and let it cool down to room temperature naturally. Weigh 0.01 g of dopamine hydrochloride, dissolve it in 20 ml of tris solution with pH=8.5, put it into the above-mentioned treated foam nickel sheet, soak for 48 hours, take it out and dry it in a vacuum oven. Put the product dried in the previous step into a tube furnace in a nitrogen atmosphere to raise the temperature at a rate of 2°C / min, keep it at 700°C for 2 hours, and then cool down to room temperature naturally to obtain the final sample.

[0051] The final sample processed in the previous step was used as the working electrode, the calomel electrode was used as the reference electrode, the platinum sheet electrode was used as the counter electrode, and a 3mol / L KOH solution was used as the electrolyte to assemble a three-electrode system for electrochemical testing.

[0052] figure 1 It is a scann...

Embodiment 2

[0059] Same as Example 1, the only difference is that the muffle furnace calcination temperature is 550°C.

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Abstract

The invention belongs to the field of energy storage materials, and particularly relates to preparation and application of a NiO/C composite electrode material taking a foamed nickel sheet as a substrate. A NiO/C composite material is prepared on the foamed nickel sheet, the NiO/C composite material is loaded on the foamed nickel sheet in situ through adopting a method of firstly oxidizing and then coating and carbonizing, and compared with a granular transition metal oxide coated active material, NiO and C on the foamed nickel sheet prepared by the method are combined more tightly, and the NiO/C composite material taking the foamed nickel sheet as the substrate can be directly used as an electrode material without additional coating operation.

Description

technical field [0001] The invention belongs to the field of energy storage materials, and in particular relates to the preparation and application of a NiO / C composite electrode material based on a nickel foam sheet. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Energy consumption is increasing day by day, followed by massive consumption of fossil fuels, climate change and environmental damage. In order to solve this series of problems, it is imminent to develop efficient, clean and sustainable new energy sources, and related energy conversion and storage technologies have also become one of the focuses of attention. As a new type of energy storage device that is diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/32H01G11/46
CPCH01G11/30H01G11/46H01G11/32H01G11/86Y02E60/13
Inventor 陈伟付民张志豪
Owner SHANDONG UNIV OF SCI & TECH
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