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Preparation method of magnesium cobaltate porous micro-rod/ foamed nickel combined electrode material

A composite electrode and nickel foam technology, which is applied in the field of preparation of inorganic non-metallic materials, can solve the problems of low energy density and limited application, and achieve the effect of increasing active surface, improving utilization rate and enriching voids

Inactive Publication Date: 2016-02-24
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its relatively low energy density greatly limits its application

Method used

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  • Preparation method of magnesium cobaltate porous micro-rod/ foamed nickel combined electrode material
  • Preparation method of magnesium cobaltate porous micro-rod/ foamed nickel combined electrode material
  • Preparation method of magnesium cobaltate porous micro-rod/ foamed nickel combined electrode material

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Experimental program
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Effect test

Embodiment 1

[0036] Immerse the clean nickel foam into 1.5mol / L oxalic acid aqueous solution, and add the mixed aqueous solution of magnesium nitrate and cobalt nitrate dropwise to the oxalic acid aqueous solution under the condition of the temperature of 25°C and the stirring speed of 100 rpm, in which the nitric acid The molar concentration of magnesium is 0.25mol / L, the molar concentration of cobalt nitrate is 0.5mol / L, the dropping rate is 120 drops / min, and the final molar ratio of magnesium nitrate and oxalic acid is 1:30. The stirring reaction time was 15 minutes. After the reaction, the nickel foam was taken out and washed, then put into an oven with a programmed temperature increase rate of 5°C / min, and dried at 100°C for 2 hours. Then put it in a muffle furnace for calcination, the calcination time is 2.5 hours, the calcination temperature is 350° C., and the heating rate is 10° C. / minute. After natural cooling, the magnesium cobaltate porous microrod / foam nickel composite elect...

Embodiment 2

[0039] Immerse the clean nickel foam into 1.0mol / L oxalic acid aqueous solution, and add the mixed aqueous solution of magnesium nitrate and cobalt nitrate dropwise to the oxalic acid aqueous solution under the condition of temperature of 25°C and stirring speed of 100 rpm, in which nitric acid The molar concentration of magnesium is 0.25mol / L, the molar concentration of cobalt nitrate is 0.5mol / L, the dropping rate is 100 drops / min, and the final molar ratio of magnesium nitrate and oxalic acid is 1:20. The stirring reaction time was 20 minutes. After the reaction, the nickel foam was taken out and washed, then put into an oven with a programmed temperature increase rate of 5°C / min, and dried at 100°C for 2 hours. Then put it in a muffle furnace for calcination, the calcination time is 2.0 hours, the calcination temperature is 350° C., and the heating rate is 10° C. / min. After natural cooling, the magnesium cobaltate porous microrod / foam nickel composite electrode material i...

Embodiment 3

[0042] Immerse the clean nickel foam into 1.5mol / L oxalic acid aqueous solution, and add the mixed aqueous solution of magnesium chloride and cobalt chloride dropwise to the oxalic acid aqueous solution under the condition of temperature of 25°C and stirring speed of 100 rpm, in which magnesium chloride The molar concentration is 0.25mol / L, wherein the cobalt chloride molar concentration is 0.5mol / L, the dropping rate is 120 drops / min, and the final molar ratio of magnesium chloride and oxalic acid is 1:20. The stirring reaction time was 10 minutes. After the reaction, the nickel foam was taken out and washed, then put into an oven with a programmed temperature increase rate of 5°C / min, and dried at 100°C for 2 hours. Then put it in a muffle furnace for calcination, the calcination time is 2.5 hours, the calcination temperature is 350° C., and the heating rate is 10° C. / minute. After natural cooling, the magnesium cobaltate porous microrod / foam nickel composite electrode mate...

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Abstract

The invention belongs to the preparation field of inorganic non-metallic materials, and especially relates to a preparation method of a magnesium cobaltate porous micro-rod / foamed nickel combined electrode material. The method includes the steps: immersing clean foamed nickel into an oxalic acid aqueous solution, adding a mixed aqueous solution containing soluble magnesium salt and soluble cobalt salt into the above solution at a room temperature and in a stirring condition, stirring for reaction until a micrometer-structure precursor grows on the surface of the foamed nickel, taking out the foamed nickel, conducting cleaning, drying and calcining in sequence, and finally obtaining a magnesium cobaltate porous micro-rod / foamed nickel combined electrode material. The preparation method is simple and convenient, is low in manufacture cost, and produces products that have high purity. A combined magnesium cobaltate porous micro-rod has a nano-scale porous channel structure, and the dimension of the channel is 10-20nm. The magnesium cobaltate porous micro-rod is 200-500nm in diameter and 2-5[Mu]m in length.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic materials, and in particular relates to a preparation method of a magnesium cobaltate porous microrod / foam nickel composite electrode material. Background technique [0002] Supercapacitor is a new type of electrochemical energy storage device with high power density, excellent cycle stability and fast charging and discharging. It has huge potential applications in many fields such as hybrid vehicles, industrial power, national defense and storage systems. value. But its relatively low energy density greatly limits its application. How to design and prepare electrode materials with excellent electrochemical properties is the key to solving the existing problems of supercapacitors. Metal oxides have become a class of very potential supercapacitor electrode materials due to their higher specific capacitance compared to carbon materials and higher cycle stability compa...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/46
CPCY02E60/13H01G11/86H01G11/30H01G11/46
Inventor 许家胜张杰
Owner BOHAI UNIV
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