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Novel battery super capacitor electrode material with high power density and high energy density and preparing method thereof

A supercapacitor electrode, high energy density technology, used in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, electrolytic inorganic material coating, etc. , to achieve the effect of high academic and commercial value, excellent cycle stability

Inactive Publication Date: 2014-09-10
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, some metal hydroxides, metal sulfides and mixed metal oxides are also used as electrode materials for supercapacitors. Although these materials all exhibit high specific capacitance (ie, charge storage capacity) and energy density, their The power density is not satisfactory, and the energy density at high charge and discharge rates is low
[0005] Since the prior art does not disclose any capacitor electrode material with both high power density and high energy density, a new concept of battery-type supercapacitor material is developed to make supercapacitors both high energy density and high energy density. The comprehensive environmental protection energy storage equipment with power density fundamentally solves the shortcoming of single purpose of traditional energy storage equipment and innovates existing commercial energy storage equipment

Method used

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  • Novel battery super capacitor electrode material with high power density and high energy density and preparing method thereof
  • Novel battery super capacitor electrode material with high power density and high energy density and preparing method thereof
  • Novel battery super capacitor electrode material with high power density and high energy density and preparing method thereof

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Embodiment 1

[0083] The method for preparing a novel battery-type supercapacitor electrode material with high power density and high energy density in this embodiment comprises the following steps:

[0084] 1) Accurately weigh 0.485gBi(NO 3 ) 3 ·5H 2 O, 1.5g of thioacetamide and 1.563g of carbon nanotubes (CNT), dissolved in 15ml of deionized water, continued stirring for 5min;

[0085] 2) Transfer the suspension in 1) to a 20ml high-temperature reaction kettle, put it into a blast drying oven and react at 180°C for 6h;

[0086] 3) to treat the natural cooling of the reactor, the Bi in the reactor 2 S 3 / CNT(Bi 2 S 3 / CNT mass ratio is 1:2) washed with deionized water and absolute ethanol three times respectively, and then dried in a blast drying oven at 60°C;

[0087] 4) Dilute Bi with 5% Nafion ethanol solution 2 S 3 / CNT nanocomposite was prepared into a 1mg / mL solution and ultrasonicated for 5min;

[0088] 5) Drop 5 μL of Bi on the glassy carbon electrode with a pipette gun ...

Embodiment 2

[0094] The difference between this embodiment and embodiment 1 is that the number of times of repeating the three steps 5-7 in step 8) of this embodiment is 0.

Embodiment 3

[0096] The difference between this embodiment and embodiment 1 is that the number of times of repeating the three steps 5-7 in step 8) of this embodiment is 1.

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Abstract

The invention discloses a novel battery super capacitor electrode material with high power density and high energy density. The electrode material is formed by multiple layers of Bi2S3 / CNT films and rGO films in a composite mode, wherein the layer number of the Bi2S3 / CNT films is the same as that of the rGO films and the Bi2S3 / CNT films and the rGO films are arranged in an alternate stacking mode. The invention further discloses a method for preparing the electrode materials. According to the method, firstly, Bi2S3 / CNT materials are applied and dried, then graphene oxide is deposited on the Bi2S3 / CNT in an electrochemical deposition method, and ultimately, the graphene oxide becomes rGO in a reduction mode by means of a cyclic voltammetry method. The capacitor electrode material has high energy density which is 460Wh / kg, high power density which is 22802W / kg, high specific capacitance which is 3568F / g when the current density is 22A / g, and excellent cycling stability which accounts for 90% of retained initial capacity after cycling of 1000 turns.

Description

technical field [0001] The invention belongs to the field of capacitor parts and relates to a capacitor electrode material, in particular to a battery-type supercapacitor electrode material having both high power density and high energy density. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are energy storage devices with high energy density between traditional capacitors and batteries. Supercapacitors mainly rely on the electrochemical reaction on the surface of electrode materials and the electric double layer to store charges. They have the advantages of rapid charge and discharge, long service life, good stability, wide operating temperature, simple circuit, safety and reliability, and environmental protection. At present, it has obtained a wide range of commercial applications, including consumer electronics, electric vehicles, flexible electronic displays, and aerospace. However, current supercapacitors also suffer from low c...

Claims

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Application Information

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IPC IPC(8): H01G11/26H01G11/30H01G11/86B82Y30/00
CPCY02E60/13H01G11/36H01G11/86C25D9/04
Inventor 李长明杨萍萍谢佳乐
Owner SOUTHWEST UNIVERSITY
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