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Manufacturing method for CoTe nanowire for supercapacitor electrode

A supercapacitor and nanowire technology, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, nanotechnology, etc., can solve the problems of complex process, low conductivity, poor stability, etc., and achieve excellent rate performance and mechanical strength. high effect

Inactive Publication Date: 2020-01-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the existing traditional pseudocapacitive electrode materials such as low conductivity, poor stability, and complicated process, using cobalt nitrate hexahydrate and sodium tellurite as the main raw materials, ethylene glycol as the solvent, and hot solvent CoTe nanowire electrode materials with a diameter of 20nm to 40nm and a length of 1μm to 1.5μm were prepared by this method

Method used

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  • Manufacturing method for CoTe nanowire for supercapacitor electrode
  • Manufacturing method for CoTe nanowire for supercapacitor electrode
  • Manufacturing method for CoTe nanowire for supercapacitor electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) 99.9% purity) cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) purity 99.9% sodium tellurite (Na 2 TeO 3 ) is added in ethylene glycol according to the relationship of the amount of substance at 1:1, and is configured into a mixed solution with a cobalt nitrate concentration of 0.01mol / L and a sodium tellurite concentration of 0.01mol / L, and stirs for 30 minutes until completely dissolved;

[0037] (2) Add dropwise 25%wt-28%wt ammonia water to the solution in step (1) to a concentration of 0.03mol / L, and stir for 30 minutes;

[0038](3) Add dropwise 80% wt of hydrazine monohydrate (N 2 h 4 ·H 2 (0) to a concentration of 0.03mol / L, stirred for 30 minutes to obtain a black solution;

[0039] (4) Move the black solution obtained in step (3) into a stainless steel hydrothermal reaction kettle, and heat at 150° C. for 12 hours to obtain a gray-black precipitate;

[0040] (5) The gray-black precipitate obtained by the reaction in step (4) is centrifugally washed s...

Embodiment 2

[0044] (1) Purity 99.9% cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) with a purity of 99.9% sodium tellurite (Na 2 TeO 3 ) is added in ethylene glycol according to the relationship of the amount of substance at 1:1, and is configured into a mixed solution with a cobalt nitrate concentration of 0.01mol / L and a sodium tellurite concentration of 0.01mol / L, and stirs for 30 minutes until completely dissolved;

[0045] (2) Add dropwise 25%wt-28%wt ammonia water to the solution in step (1) to a concentration of 0.03mol / L, and stir for 30 minutes;

[0046] (3) Add dropwise 80% wt of hydrazine monohydrate (N 2 h 4 ·H 2 (0) to a concentration of 0.04mol / L, stirred for 45 minutes to obtain a black solution;

[0047] (4) Move the black solution obtained in step (3) into a stainless steel hydrothermal reaction kettle, and heat at 150° C. for 12 hours to obtain a gray-black precipitate;

[0048] (5) The gray-black precipitate obtained by the reaction in step (4) is centrifugall...

Embodiment 3

[0052] (1) Purity 99.9% cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) with a purity of 99.9% sodium tellurite (Na 2 TeO 3 ) is added in ethylene glycol according to the relationship of the amount of substance 1:1, and is configured into a mixed solution with a cobalt nitrate concentration of 0.02mol / L and a sodium tellurite concentration of 0.02mol / L, and stirs for 30 minutes until completely dissolved;

[0053] (2) Add dropwise 25%wt-28%wt ammonia water to the solution in step (1) to a concentration of 0.04mol / L, and stir for 45 minutes;

[0054] (3) Add dropwise 80% wt of hydrazine monohydrate (N 2 h 4 ·H 2 (0) to a concentration of 0.04mol / L, stirred for 45 minutes to obtain a black solution;

[0055] (4) Move the black solution obtained in step (3) into a stainless steel hydrothermal reaction kettle, and heat at 150° C. for 12 hours to obtain a gray-black precipitate;

[0056] (5) The gray-black precipitate obtained by the reaction in step (4) is centrifugally w...

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Abstract

The invention relates to a manufacturing method for a CoTe nanowire for a supercapacitor electrode. The CoTe nanowire electrode material with the diameter of 20 nm to 40 nm and the length of 1 mum to1.5 mum is prepared by adopting a thermal solvent method, taking cobalt nitrate hexahydrate and sodium tellurite as main raw materials and taking ethylene glycol as a solvent. The specific capacitanceof the electrode reaches up to 643.6 F / g under the current density of 1 A / g, 90.2% of specific capacitance can still be kept under the large current density of 20 A / g, the rate capability is excellent, a traditional soft package supercapacitor manufacturing method can be combined to manufacture a high-performance supercapacitor, and rapid charging and discharging are carried out under the high current density. And the manufactured capacitors can also form a supercapacitor bank for situations with high-power output such as starting and stopping of cranes and automobile engines. Benefited fromthe advantage of high mechanical strength of the nanowires, the cobalt telluride nanowire pseudocapacitance type supercapacitor electrode also has a certain application prospect in the field of flexible wearable energy storage equipment.

Description

technical field [0001] The invention belongs to a method for preparing a supercapacitor electrode material characterized by microscopic appearance, in particular to a method for preparing a CoTe nanowire for a supercapacitor electrode. Background technique [0002] With the gradual consumption of fossil energy, in order to solve the problem of utilization of traditional energy and renewable energy, the demand for high-performance energy storage devices is also increasing. Energy storage devices can be divided into energy type and power type. As a power-type energy storage device, supercapacitors have attracted widespread attention due to their advantages such as high power density and long cycle life, and have been developed rapidly in recent years. It fills the gap between traditional electrostatic capacitors (high specific power, low specific energy) and chemical batteries (high specific energy, low specific power). Wide range of applications. [0003] As one of the cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86C01B19/04B82Y40/00
CPCB82Y40/00C01B19/04C01P2002/72C01P2004/16C01P2004/61C01P2004/64H01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 肖谧宿玉鹏赵美莲
Owner TIANJIN UNIV
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