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A kind of nio/ng/nf composite electrode material and preparation method thereof

A composite electrode and nickel foam technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problem of high internal resistance

Active Publication Date: 2020-04-03
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

AI Technical Summary

Problems solved by technology

The preparation process is relatively simple, and the obtained porous network composite structure is conducive to the transmission of electrons and electrolyte ions in the electrochemical process, thereby facilitating the occurrence of electrochemical energy storage reactions, and can effectively improve the electrochemical performance of electrode materials. Nickel foam is used as the substrate, and the forest-like NiO and graphene are directly grown on the nickel foam skeleton. The resulting NiO has good redox properties, and graphene and Ni can improve conductivity, effectively avoiding poor electrode cycle stability and internal resistance. Higher problems, the combination of the three can make the prepared porous electrode material have higher specific capacitance and good cycle performance

Method used

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  • A kind of nio/ng/nf composite electrode material and preparation method thereof
  • A kind of nio/ng/nf composite electrode material and preparation method thereof
  • A kind of nio/ng/nf composite electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] (1) Foamed nickel pretreatment: Cut the foamed nickel into 1cm×1cm square pieces, soak the foamed nickel in acetone for 5min, take out the foamed nickel, and then soak the foamed nickel in 1mol / L dilute hydrochloric acid 5min, finally, take out the nickel foam, wash it three times with deionized water and absolute ethanol ultrasonically, and dry it in a vacuum oven at 60°C;

[0019] (2) The nickel acetate that takes 0.3mmol is dissolved in 2ml ethylene glycol, and is recorded as solution a;

[0020] (3) Weigh 0.007g o-phenanthroline and dissolve it in 1ml ethanol, and record it as solution b;

[0021] (4) Pour prepared solution a into solution b, mix evenly, put it into the quartz boat ①, and then put the foamed nickel pretreated in step (1) into the quartz boat ①;

[0022] (5) Put 0.1g sodium hydroxide and 2ml ethylene glycol into another quartz boat ②, so that the molar ratio of nickel acetate to sodium hydroxide is 3:25, put the two quartz boats ① and ② successively...

Embodiment 2

[0024] (1) Foamed nickel pretreatment: Cut the foamed nickel into 1cm×1cm square pieces, soak the foamed nickel in acetone for 5min, take out the foamed nickel, and then soak the foamed nickel in 1mol / L dilute hydrochloric acid 5min, finally, take out the nickel foam, wash it three times with deionized water and absolute ethanol ultrasonically, and dry it in a vacuum oven at 60°C;

[0025] (2) The nickel acetate that takes by weighing 0.6mmol is dissolved in 1ml ethylene glycol, is recorded as solution a;

[0026] (3) Take by weighing 0.014g o-phenanthroline and dissolve it in 1ml ethanol, and record it as solution b;

[0027] (4) Pour prepared solution a into solution b, mix evenly, put it into the quartz boat ①, and then put the foamed nickel pretreated in step (1) into the quartz boat ①;

[0028] (5) Put 0.1g sodium hydroxide and 2ml ethylene glycol into another quartz boat ②, so that the molar ratio of nickel acetate to sodium hydroxide is 6:25, put the two quartz boats ①...

Embodiment 3

[0030] (1) Foamed nickel pretreatment: Cut the foamed nickel into 1cm×1cm square pieces, soak the foamed nickel in acetone for 5min, take out the foamed nickel, and then soak the foamed nickel in 1mol / L dilute hydrochloric acid 5min, finally, take out the nickel foam, wash it three times with deionized water and absolute ethanol ultrasonically, and dry it in a vacuum oven at 60°C;

[0031] (4) The nickel acetate that takes 0.15mmol is dissolved in 1ml ethylene glycol, and is recorded as solution a;

[0032] (3) Weigh 0.007g o-phenanthroline and dissolve it in 1ml ethanol, and record it as solution b;

[0033] (4) Pour prepared solution a into solution b, mix evenly, put it into the quartz boat ①, and then put the foamed nickel pretreated in step (1) into the quartz boat ①;

[0034] (5) Put 0.1g sodium hydroxide and 2ml ethylene glycol into another quartz boat ②, so that the molar ratio of nickel acetate to sodium hydroxide is 3:50, put the two quartz boats ① and ② successivel...

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Abstract

The invention discloses a NiO / NG / NF composite electrode material and a preparation method thereof. The preparation method comprises the following steps that firstly, nickel foam is pretreated by usingacetone and dilute hydrochloric acid, the treated nickel foam is correspondingly subjected to ultrasonic cleaning by deionized water and absolute alcohol, and after vacuum drying is carried out, thepretreated nickel foam is immersed in a mixed solution containing nickel acetate, phenanthroline, ethanol and ethylene glycol, and then heating up to 400-600 DEG C at a temperature rise rate being 1-20 DEG C / min is carried out in a tubular furnace under the condition of nitrogen supply together with an ethylene glycol solution of sodium hydroxide, heat preservation is carried out for 1-12 h, and the NiO / NG / NF composite electrode material is prepared through a reaction. The electrode material has good specific capacitance and good cycle stability, and the specific capacitance retention rate ofthe electrode is 96% after 2000 cycles of charging and discharging at current density of 5A / g.

Description

technical field [0001] The invention relates to a NiO / NG / NF composite electrode material and its preparation method, in particular to a tree-like NiO / NG / NF composite electrode material with good charge-discharge performance and cycle stability and its preparation method. Background technique [0002] Supercapacitors have the characteristics of high power density, short charging time, long cycle life and low cost, and are widely used in portable electronic devices, hybrid electric vehicles and large smart grids. However, due to the poor conductivity, it is difficult to further achieve the theoretical specific capacitance. The traditional method is usually to add adhesive, conductive graphite and active electrode material to make a paste electrode material and apply it on the electrode, which makes it difficult for the performance of the active electrode material to fully play its role. In order to solve this problem, nickel foam is used as the electrode current collector, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/38H01G11/46H01G11/86
CPCY02E60/13
Inventor 宋彩霞王德宝周艳红李静张亚楠
Owner 合肥九州龙腾科技成果转化有限公司
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