Composite material loaded by taking starch as carbon base as well as preparation method and application of the composite material

A composite material and starch technology, which is used in the preparation/purification of carbon, hybrid capacitor electrodes, cobalt oxide/cobalt hydroxide, etc. The effect of good electrochemical performance

Active Publication Date: 2020-06-26
厦门睿珩兴能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the insufficient mass transfer capacity of the inherent carbon skeleton of conventional carbon fibers, there is still a large gap between the actual capacitance of TMO / C and the theoretical capacitance.

Method used

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  • Composite material loaded by taking starch as carbon base as well as preparation method and application of the composite material
  • Composite material loaded by taking starch as carbon base as well as preparation method and application of the composite material
  • Composite material loaded by taking starch as carbon base as well as preparation method and application of the composite material

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preparation example Construction

[0038] An embodiment of the present invention provides a method for preparing a composite material with starch as a carbon-based load, which includes the following steps:

[0039] S1. Uniformly mixing the starch solution and the cobalt source solution to obtain a mixed solution; wherein the cobalt source solution is an aqueous solution containing a cobalt compound.

[0040] In this embodiment, the starch solution is used as a conductive 3D carbon network and mixed with other heteroatom-containing precursors to obtain a nanocomposite electrode material with a special structure and excellent performance. Optionally, the starch and the cobalt source can be dissolved in deionized water respectively to obtain a starch solution and a cobalt source solution, which are evenly stirred to obtain a mixed solution. By adjusting the concentration of the starch solution, the viscosity of the starch solution can be changed, and then the pore size of the carbon template obtained after carboni...

Embodiment 1

[0054] This embodiment provides a method for preparing a composite material with starch as a carbon-based load, comprising the following steps:

[0055] S1. Add starch and deionized water with a mass ratio of 3:1 into a beaker and mix evenly to obtain a starch solution with a mass concentration of 75 wt%. 4.37 g of cobalt nitrate hexahydrate was dissolved in deionized water and uniformly stirred and dissolved to obtain a 0.15 mol / L cobalt source solution. The starch solution and the cobalt source solution are uniformly mixed in a mass ratio of 3:1 to obtain a mixed solution;

[0056] S2. Put the mixed solution in a crucible, transfer the crucible to a muffle furnace, and take it out after a carbonization reaction at 500° C. for 0.5 h to obtain a carbon template;

[0057] S3. Put the carbon template in the reactor, add 2 / 3 of the volume of the reactor with deionized water, then react at 120° C. for 12 hours, rapidly cool and dry the reaction product to obtain a composite mater...

Embodiment 2

[0059] This embodiment provides a method for preparing a composite material with starch as a carbon-based load, comprising the following steps:

[0060] Steps S1 and S2 of this embodiment are the same as in Embodiment 1;

[0061] S3. Put the carbon template in the reactor, add 2 / 3 of the volume of the reactor with deionized water, then react at 150° C. for 12 hours, cool the reaction product rapidly, and dry to obtain a composite material.

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Abstract

The invention relates to a preparation method loaded by taking starch as a carbon base, and relates to the technical field of supercapacitors. The method comprises the following steps: S1, uniformly mixing a starch solution and a cobalt source solution to obtain a mixed solution, with the cobalt source solution being an aqueous solution of a cobalt-containing compound, and the cobalt-containing compound being selected from one or more of cobalt nitrate, cobalt chloride or cobalt oxalate; S2, carbonizing the mixed solution to obtain a carbon template; and S3, adding deionized water into the carbon template for hydrothermal reaction, and cooling and drying a reaction product to obtain the composite material. The invention also relates to the composite material prepared by the method and an application of the composite material in a supercapacitor. The composite material has excellent electrochemical performance, and has a great application prospect in the fields of energy storage, conversion, catalysts and other related applications.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, and in particular to a composite material with starch as a carbon-based load, a preparation method and an application thereof. Background technique [0002] With the depletion of non-renewable energy sources, the development of new energy sources has become one of the greatest challenges faced by mankind in the new century. As a new type of energy storage element between traditional capacitors and batteries, supercapacitors are an important way to solve the problems of resource depletion, environmental pollution, and greenhouse effect caused by fossil energy. Supercapacitors have the characteristics of super large capacity, high power density, long cycle life, and high charge and discharge efficiency. The key point is how to apply it in practice and make full use of electric energy. Supercapacitors, which are characterized by high surface area and pore volume, high thermal stability, va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01G51/04H01G11/24H01G11/30H01G11/34H01G11/44
CPCC01G51/04C01P2002/72C01P2002/82C01P2004/80C01P2006/40C01B32/05H01G11/24H01G11/30H01G11/34H01G11/44Y02E60/13
Inventor 孙东亚林晨何丽雯赵怡灿
Owner 厦门睿珩兴能源科技有限公司
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