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Flexible electrode material and preparation method and application thereof

A flexible electrode, active material technology, applied in battery electrodes, hybrid capacitor electrodes, non-aqueous electrolyte battery electrodes, etc. Development and other issues, to achieve the effect of improving electrical conductivity, easy operation, and improving heat dissipation capacity

Inactive Publication Date: 2017-05-10
SHENZHEN INST OF ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat emitted in the power system will have a serious impact on the stability, safety, and life of the energy device, and will greatly weaken the actual application and development of the energy storage device.
At present, porous materials such as carbon paper, metal foam, and graphene airgel are widely used as carriers to load active substances to prepare electrode materials for energy devices. Although such electrode materials have good electrical conductivity, their thermal conductivity is poor.

Method used

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  • Flexible electrode material and preparation method and application thereof
  • Flexible electrode material and preparation method and application thereof
  • Flexible electrode material and preparation method and application thereof

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preparation example Construction

[0030] Such as figure 1 Shown, also provide the preparation method of the above-mentioned flexible electrode material of an embodiment, comprise the following steps:

[0031] S10. Provide a flexible base material with high thermal conductivity, wherein the thermal conductivity of the flexible base material with high thermal conductivity is 100Wm -1 K -1 above.

[0032] Specifically, the high thermal conductivity flexible base material can be a high thermal conductivity graphene film or a high thermal conductivity graphite film.

[0033] Among them, the high thermal conductivity graphene film is prepared by the following method: graphene is prepared by electrochemical exfoliation or graphene oxide is prepared by chemical oxidation exfoliation, and the graphene film or graphene oxide film is obtained by suction filtration or casting film forming process, and the Heat treatment to obtain a graphene film with high thermal conductivity.

[0034] Specifically, the preparation me...

Embodiment 1

[0049] Electrochemical exfoliation of graphite rods to prepare graphene. Use high-purity graphite rod as working electrode, platinum sheet as counter electrode, 0.1MNa 2 WO 4 The aqueous solution is the electrolyte, and the working voltage is 10V. After the stripping is complete, wash, ultrasonic, and centrifuge to collect few-layer graphene;

[0050] Dispersing the above-mentioned graphene in the organic solvent DMF, adopting the method of suction filtration, obtains the graphene film;

[0051] Using 5% H 2 -Heat treatment of graphene film in Ar atmosphere, heating rate 5°C / min, heat preservation at 900°C for 2h, and natural cooling to obtain graphene film with high thermal conductivity. The scanning electron microscope image of the graphene film with high thermal conductivity is as follows figure 2 Shown; The thermal conductivity of this high thermal conductivity graphene film is as shown in table 1.

[0052] Electrodeposition of ternary cobalt nickel sulfide (CoNi 2 S...

Embodiment 2

[0057] Improve the Hummers method to prepare graphene oxide. After chemical exfoliation, washing, and freeze-drying, prepare an aqueous solution of graphene oxide with a concentration of 3 mg / mL;

[0058] Using copper foil as the substrate, the above graphene oxide solution is evenly cast on the surface of the copper foil, left to stand, and dried at 50°C to form a film;

[0059] Using high temperature heat treatment, 10%H 2 -Ar atmosphere, heating rate 10°C / min, heat preservation at 1000°C for 1h, natural cooling to obtain high thermal conductivity graphene film;

[0060] Electrodeposited polyaniline in three-electrode system, high thermal conductivity graphene film as working electrode, reference electrode as saturated calomel electrode, counter electrode as platinum sheet, and electrolyte composition as 0.5M H 2 SO 4 and 0.2M aniline solution. The electrochemical cyclic voltammetry scan was performed on the electrochemical workstation, the voltage range was from -0.2V to...

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Abstract

The invention belongs to the technical field of energy devices, and discloses a high-thermal conductivity flexible electrode material and a preparation method and application thereof. The flexible electrode material comprises a high-thermal conductivity flexible substrate material and an active material loaded on the surface of the high-thermal conductivity flexible substrate material, wherein the thermal conductivity of the high-thermal conductivity flexible substrate material is over 100Wm<-1>K<-1>. According to the preparation method, the high-thermal conductivity flexible substrate material is adopted as a substrate, the active material is loaded on the surface of the substrate and the flexible substrate and the active material form a whole electrode material. The prepared flexible electrode material has flexibility, good conductivity and excellent thermal conductivity. Meanwhile, the preparation technology has the advantages that the process is simple and the device is convenient to assemble. According to the energy device assembled by the electrode material, effective heat management can be carried out, and the heat dissipation capability of the energy device is improved, thereby ensuring the stability, the security and the service life of the energy device when working.

Description

technical field [0001] The invention belongs to the technical field of energy devices, and in particular relates to a flexible electrode material with high thermal conductivity, a preparation method and an application. Background technique [0002] With the development of social economy and the improvement of people's living standards, the demand for energy is increasing day by day, the traditional fossil energy is increasingly depleted, and the negative impact of their use on the global climate and environment is getting worse. In order to solve energy shortage and ecological problems, people are constantly looking for alternative clean energy. Renewable energy sources such as hydropower, wind energy, solar energy, tidal energy, and geothermal energy have become ideal alternative energy sources. However, these energy sources have their own limitations, such as intermittency and uneven geographical distribution. In addition, the wide application of mobile power sources, suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/86H01M4/13H01M4/139
CPCH01G11/24H01G11/86H01M4/13H01M4/139Y02E60/10
Inventor 符显珠李云明孙蓉
Owner SHENZHEN INST OF ADVANCED TECH
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