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Preparation method and application of supercapacitor based on ultrathin two-dimensional nickel hydroxide nano material

A technology of supercapacitor and nickel hydroxide, which is used in the manufacture of hybrid/electric double layer capacitors, etc., can solve the problems of low specific capacity and short cycle life of supercapacitors, achieve good application prospects, improve cycle life, and improve specific capacity. Effect

Inactive Publication Date: 2014-01-01
曹传宝
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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 solve technical problems such as low specific capacity and short cycle life of existing supercapacitors, and provide a preparation method and application of supercapacitors based on ultra-thin two-dimensional nickel hydroxide nanomaterials

Method used

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  • Preparation method and application of supercapacitor based on ultrathin two-dimensional nickel hydroxide nano material
  • Preparation method and application of supercapacitor based on ultrathin two-dimensional nickel hydroxide nano material
  • Preparation method and application of supercapacitor based on ultrathin two-dimensional nickel hydroxide nano material

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Effect test

Embodiment 1

[0027] (1) Using ultra-thin two-dimensional nickel hydroxide nanomaterials as the active material, acetylene black as the conductive agent, and polytetrafluoroethylene as the binder, the mass ratio of the active material, conductive agent and binder is 80:10: Disperse in absolute ethanol at a ratio of 10, mix evenly with ultrasonic treatment for 30 minutes, and then coat it on the battery-grade nickel foam current collector, dry it in vacuum at 80°C for 10 hours, and press it under a pressure of 10MPa for 30 seconds. into a supercapacitor test electrode.

[0028] (2) Soak the supercapacitor test electrode prepared in step 1 in 6 M potassium hydroxide electrolyte for more than 10 hours for activation treatment, use a large-area platinum sheet as the counter electrode, and a saturated calomel electrode as the reference electrode, 6 The potassium hydroxide solution of M was used as the electrolyte to assemble a simulated supercapacitor for electrochemical performance testing. Cy...

Embodiment 2

[0032] (1) Using ultra-thin two-dimensional nickel hydroxide nanomaterials as the active material, acetylene black as the conductive agent, and polytetrafluoroethylene as the binder, the mass ratio of the active material, conductive agent and binder is 75:15: Disperse in absolute ethanol at a ratio of 10, mix evenly with ultrasonic treatment for 30 minutes, and then coat it on the battery-grade nickel foam current collector, dry it in vacuum at 80°C for 10 hours, and press it under a pressure of 10MPa for 30 seconds. into a supercapacitor test electrode.

[0033] (2) Soak the supercapacitor test electrode prepared in step 1 in 6 M potassium hydroxide electrolyte for more than 10 hours for activation treatment, use a large-area platinum sheet as the counter electrode, and a saturated calomel electrode as the reference electrode, 6 The potassium hydroxide solution of M was used as the electrolyte to assemble a simulated supercapacitor for electrochemical performance testing. Wh...

Embodiment 3

[0037](1) Using ultra-thin two-dimensional nickel hydroxide nanomaterials as the active material, acetylene black as the conductive agent, and polyvinylidene fluoride as the binder, the mass ratio of the active material, conductive agent and binder is 70:20 Disperse in N-methylpyrrolidone at a ratio of :10, mix evenly with ultrasonic treatment for 30 minutes, then coat it on the battery-grade copper foam current collector, dry it in vacuum at 100°C for 12 hours, and press it under a pressure of 10MPa for 30 seconds Afterwards, a supercapacitor test electrode is made.

[0038] (2) Soak the supercapacitor test electrode prepared in step 1 in 6 M potassium hydroxide electrolyte for more than 10 hours for activation treatment, use a large-area platinum sheet as the counter electrode, and a saturated calomel electrode as the reference electrode, 6 The potassium hydroxide solution of M was used as the electrolyte to assemble a simulated supercapacitor for electrochemical performance...

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Abstract

The invention discloses a preparation method and application of a supercapacitor based on an ultrathin two-dimensional nickel hydroxide nano material. By taking the ultrathin two-dimensional nickel hydroxide nano material as an active substance, the preparation method of the supercapacitor comprises the following steps of dispersing the active substance, a conductive agent and a binder in a dispersing agent according to certain mass ratio, performing ultrasonic treatment, mixing uniformly, applying the mixture to a battery-grade current collector, and performing vacuum drying and tableting, thus preparing a supercapacitor electrode; and soaking the electrode in an electrolyte for more than 10 hours, performing activating treatment, and assembling to form an asymmetrical supercapacitor with a carbon material as a counter electrode and an ion permeable membrane as a diaphragm, or assembling to form an analog supercapacitor with a large-area platinum sheet as the counter electrode and a saturated calomel electrode as a reference electrode, or performing electrochemical performance testing investigation in an alkaline electrolyte. The prepared supercapacitor has ultrahigh specific capacity, good rate capability and long cycle life, and particularly can meet the general requirements of new energy electric automobiles, thereby being a supercapacitor with most application foreground.

Description

technical field [0001] The invention relates to a preparation method and application of a supercapacitor based on an ultrathin two-dimensional nickel hydroxide nanomaterial, and belongs to the field of supercapacitor preparation technology and application. [0002] Background technique [0003] Supercapacitors, also known as electrochemical capacitors, are considered to be a high-energy chemical power source with broad application prospects due to their advantages such as high power density, short charge and discharge time, and long cycle life. According to the charge storage mechanism, supercapacitors can be divided into two types: electrochemical double layer capacitors and pseudocapacitors. Electrochemical double-layer capacitors mainly use reversible ion adsorption on the surface of electrode materials to store charges. The materials used are carbonaceous materials. This type of supercapacitor has high power density, but its energy density is low. The pseudocapacitor u...

Claims

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Application Information

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IPC IPC(8): H01G11/84H01G11/86
CPCY02E60/13
Inventor 曹传宝朱有启
Owner 曹传宝
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