MnCO3/Ni(OH)2/NF multilayer mesh composite electrode material and preparation method thereof

A composite electrode and mesh technology, which is used in the field of preparation of MnCO3/Ni2/NF multi-level mesh composite electrode materials

Active Publication Date: 2017-10-20
东营睿港管道工程有限责任公司
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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 serves as both the substrate and the nickel source, making Ni(OH) 2 directly grown on the nickel foam framework, the resulting Ni(OH) 2 , MnCO 3 With good redox properties, Ni can improve the conductivity of the porous network structure, effectively avoid the problems of poor electrode cycle stability and high internal resistance, and the combination of the three can make the prepared porous electrode material have a higher ratio Capacitance and good cyclability

Method used

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  • MnCO3/Ni(OH)2/NF multilayer mesh composite electrode material and preparation method thereof
  • MnCO3/Ni(OH)2/NF multilayer mesh composite electrode material and preparation method thereof
  • MnCO3/Ni(OH)2/NF multilayer mesh composite electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0015] (1) Foamed nickel pretreatment: Cut the foamed nickel substrate into square pieces of 1cm×1cm size, soak the foamed nickel piece in 0.1 mol / L dilute hydrochloric acid for 10min, take out the foamed nickel piece, and wash it with deionized water Afterwards, soak in acetone for 15 min. 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.

[0016] (2) Weigh 0.02g of urea, dissolve it in deionized water, then transfer the urea solution to a stoppered glass test tube, and heat at 90°C for 30min;

[0017] (3) Dip the pretreated nickel foam into 5 mL of 0.5% potassium permanganate solution, and then transfer it to the urea solution obtained in the previous step, and react at 90° C. for 9 h. The foamed nickel sheet was taken out, cleaned with deionized water, and dried in a vacuum oven to obtain MnCO grown on the foamed nickel sheet in situ. 3 / Ni(OH) 2 / NF multi-level network st...

Embodiment 2

[0019] (1) Foamed nickel pretreatment: Cut the foamed nickel substrate into square pieces of 1cm×1cm size, soak the foamed nickel piece in 0.1 mol / L dilute hydrochloric acid for 10min, take out the foamed nickel piece, and wash it with deionized water Afterwards, soak in acetone for 15 min. 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.

[0020] (2) Weigh 0.02g of urea, dissolve it in deionized water, then transfer the urea solution to a stoppered glass test tube, and heat at 85°C for 30min;

[0021] (3) Dip the pretreated nickel foam into 5 mL of 0.5% potassium permanganate solution, and then transfer it to the urea solution obtained in the previous step, and react at 85° C. for 12 hours. The foamed nickel sheet was taken out, cleaned with deionized water, and dried in a vacuum oven to obtain MnCO grown on the foamed nickel sheet in situ. 3 / Ni(OH) 2 / NF multi-level netwo...

Embodiment 3

[0023] (1) Foamed nickel pretreatment: Cut the foamed nickel substrate into square pieces of 1cm×1cm size, soak the foamed nickel piece in 0.1 mol / L dilute hydrochloric acid for 10min, take out the foamed nickel piece, and wash it with deionized water Afterwards, soak in acetone for 15 min. 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.

[0024] (2) Weigh 0.03g of urea, dissolve it in deionized water, then transfer the urea solution to a stoppered glass test tube, and heat at 90°C for 15min;

[0025] (3) Dip the pretreated nickel foam into 7.5mL 0.5% potassium permanganate solution, and then transfer it to the urea solution obtained in the previous step, and react at 90°C for 6h. The foamed nickel sheet was taken out, cleaned with deionized water, and dried in a vacuum oven to obtain MnCO grown on the foamed nickel sheet in situ. 3 / Ni(OH) 2 / NF multi-level network structu...

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Abstract

The invention discloses a MnCO3 / Ni(OH)2 / NF multilayer mesh composite electrode material and a preparation method thereof. The method comprises the following steps: dilute hydrochloric acid and acetone are firstly adopted to pre-treat nickel foam, the well-treated nickel foam is subjected to ultrasonic cleaning by using deionized water and ethanol respectively, and after vacuum drying, immersion to a patassium permanganate solution is carried out; and then, altogether transferring to a pre-heated urea solution, reaction for 3 to 12 h under a temperature of 80 to 95 DEG C is carried out, a nickel sheet is taken out, washing by deionized water is carried out, vacuum drying is carried out, and a MnCO3 / Ni(OH)2 / NF multilayer mesh composite electrode material growing on the nickel foam sheet in an in-situ mode is obtained. The electrode material has good specific capacitance and good cycle stability, and the specific capacitance retention rate of the electrode is 90% after 1000 cycles of charge and discharge circulation at a current density of 5A / g.

Description

technical field [0001] The present invention relates to a kind of MnCO 3 / Ni(OH) 2 / NF (Ni foam) multi-level network composite structure and preparation method thereof, specifically, relate to a kind of MnCO with good charge-discharge performance and cycle stability 3 / Ni(OH) 2 / NF multilevel mesh composite electrode material preparation method. Background technique [0002] Supercapacitor is a new type of energy storage device capable of fast charging and discharging, long cycle life and high power density. It has attracted much attention due to its superior performance. At present, nickel hydroxide has been widely used in supercapacitors due to its advantages such as extensive resources, low price, no pollution to the environment, and high specific capacitance, energy density, and power density. electrode material. However, due to the poor conductivity, it is difficult to further achieve the theoretical specific capacitance. Traditional electrodes are usually prepare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/30H01G11/86
CPCY02E60/13H01G11/26H01G11/30H01G11/86
Inventor 宋彩霞王德宝赵健左莉莉阮润琦朱义彪
Owner 东营睿港管道工程有限责任公司
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