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Structure of self-supporting supercapacitor electrode material and preparation method

A technology of supercapacitors and electrode materials, applied in the field of electrochemical energy storage, can solve the problems of high internal resistance, low utilization rate of active materials, disordered growth, etc., and achieve the effect of improving utilization rate

Pending Publication Date: 2018-02-02
NANCHANG UNIV
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Problems solved by technology

It effectively solves the problems of weak bonding between materials with pseudocapacitive properties and substrates in conventional preparation methods, disordered growth, large internal resistance, and low utilization of active materials. It has high electrochemical stability while maintaining high capacity. provides an effective method for the design and preparation of high-efficiency energy storage materials

Method used

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  • Structure of self-supporting supercapacitor electrode material and preparation method
  • Structure of self-supporting supercapacitor electrode material and preparation method
  • Structure of self-supporting supercapacitor electrode material and preparation method

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Embodiment Construction

[0023] In order to make the superiority of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical means involved in the various implementations described in the examples may be diversified, and are not limited to the experimental technical means.

[0024] Example.

[0025] a) Add polyacrylonitrile (PAN) into dimethylformamide (DMF) solution and stir at 60 °C for 12 hours to obtain electrospinning solution, and prepare nanofibrous membrane by electrospinning technology.

[0026] b) The fiber membrane obtained in step a) was first pre-oxidized in an air atmosphere at 250°C at a heating rate of 5°C / min for 2 hours, and then carbonized at a heating rate of 5°C / min in a nitrogen atmosphere at 1000°C for...

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Abstract

The invention discloses a structure of a self-supporting supercapacitor electrode material and a preparation method. A flexible substrate material with high conductivity is taken as a conductive bracket; a layer of active material nanosheets which are vertically arranged, are of a cross-linked structure and have pseudocapacitive performance grows on the surface of the flexible substrate material;and a layer of conductive polymers uniformly coats the surfaces of the active material nanosheets. The prepared electrode material has high capacity and relatively high electrochemical stability, is successfully applied to a supercapacitor electrode and has excellent performance.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and relates to a preparation method of a self-supporting supercapacitor electrode material with high capacity and high stability. Background technique [0002] As an emerging energy storage device, supercapacitors have attracted much attention due to their higher power density compared to batteries, fast charge and discharge capabilities, extremely high lifespan, and environmental friendliness. But its energy density is much lower than that of batteries, which limits its application as a main power source. Therefore, how to improve the energy density by designing high-efficiency electrode materials has become an urgent problem to be solved at this stage. [0003] Transition metal oxides, hydroxides, sulfides, etc., are widely used as electrode materials for supercapacitors because of their high theoretical specific capacitance. However, due to its single structure design, its high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/30H01G11/46H01G11/86
CPCH01G11/26H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 陈义旺黄俊袁凯谈利承
Owner NANCHANG UNIV
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