Method for preparing ruthenium dioxide combination electrode for energy storage

A ruthenium dioxide and composite electrode technology, applied in capacitor electrodes, capacitor parts and other directions, can solve the problems of no technology, limited application, easy cracking on the electrode surface, etc., and achieve the effect of tight bonding and high capacity

Active Publication Date: 2013-01-23
SHANGHAI AOWEI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]As the core component of ruthenium-tantalum capacitors, its electrode production has always been a technical problem. There are two main reasons for this: one is due to the special surface characteristics of ruthenium dioxide As a result, the surface of the fabricated electrode is easy to crack, leading to poor contact with the current collector, and ultimately affecting the electrochemical performance and life of the active material [Liu Hong, Gan Weiping, Guo Guijin, etc. RuO2.nH2O film preparation,

Method used

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preparation example Construction

[0022] The present invention proposes a method for preparing a ruthenium dioxide composite electrode for energy storage, comprising the following steps:

[0023] a) Mixing ruthenium dioxide materials with different contents with binder, thickener, carbon and deionized water in a shearing and stirring device to make various slurries with different ruthenium dioxide contents and different viscosities;

[0024] b) coating the slurry with the lowest ruthenium dioxide content on the current collector, drying and forming;

[0025] c) Apply multiple layers of slurry using the method of step b).

[0026] The distribution of ruthenium dioxide in the prepared composite electrode is a gradient distribution, and the content of ruthenium dioxide increases gradually away from the current collector. Wherein the ruthenium dioxide is one of hydrated ruthenium dioxide, anhydrous ruthenium dioxide or a mixture of both. The content of ruthenium dioxide in the first layer of slurry is 0-20%. Th...

Embodiment 1

[0029] Divide 100mg of commercially available hydrated ruthenium dioxide into 4 parts according to the mass ratio of 1:2:3:4, and shear and mix with a certain amount of SuperP, sodium carboxymethylcellulose, styrene-butadiene rubber and deionized water respectively to form a viscosity There are 4 batches of different slurries with viscosities of 8000, 6000, 4000 and 2800 respectively. Among them, the dry weight ratio of each batch of SuperP, sodium carboxymethylcellulose and styrene-butadiene rubber is 4:1:0.2, and the total amount is the same. The first batch of slurry was loaded onto a degreased and surface-roughened titanium foil (thickness 100 μm) using an Iwata hand-held spray gun, and then dried on-site in a 1000W oven for 5 minutes. Next, the 2-4 batches of slurry are sequentially loaded on the surface of the previously dried electrode to form 1-4 layers of composite electrode layers with successively increasing ruthenium dioxide content. Finally, the composite electro...

Embodiment 2

[0031] Divide 100mg of commercially available hydrated ruthenium dioxide into 4 parts according to the mass ratio of 1:2:3:4, and shear and mix with a certain amount of SuperP, sodium carboxymethylcellulose, polytetrafluoroethylene and deionized water respectively to form a viscous Four batches of slurries with different degrees of viscosity are 8000, 6000, 4000 and 2800 respectively. Wherein, the dry weight ratio of each batch of SuperP, sodium carboxymethylcellulose and polytetrafluoroethylene is 4:1:0.2, and the total amount is the same. The first batch of slurry was loaded onto a graphite plate with a thickness of 300 μm by manual brushing, and then dried on-site in a 1000W oven for 3 minutes. Next, the 2-4 batches of slurry are sequentially loaded on the surface of the previously dried electrode to form 1-4 layers of composite electrode layers with successively increasing ruthenium dioxide content. Finally, the composite electrode was compacted on a rolling film machine ...

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Abstract

The invention provides a method for preparing a ruthenium dioxide combination electrode for energy storage. The method is characterized by comprising the following steps of: a) mixing ruthenium dioxide materials with different content, a binder, a thickening agent, carbon and deionized water in shear mixing equipment to prepare a plurality of kinds of slurry with different ruthenium dioxide content and different viscosity; b) coating the slurry with the lowest ruthenium dioxide content on a current collector, drying and forming; and c) coating multi-layer slurry by using the method in the step b). The ruthenium dioxide combination electrode is tightly combined with the current collector, has the characteristics of high capacity and long service life and can be widely applied to the field of energy storage for national defense and civil use.

Description

technical field [0001] The invention relates to the field of chemical power sources, in particular to a method for preparing a ruthenium dioxide composite electrode for energy storage. Background technique [0002] Super capacitor (Ultra capacitor), also known as "Electrochemical Capacitor (EC)", is a new type of chemical energy storage device between traditional capacitors and batteries. Compared with traditional capacitors, it has higher energy density, and its electrostatic capacity can reach hundreds or even thousands of farads; compared with batteries, it has higher power density and long cycle life, so it combines traditional capacitors and batteries It is a chemical power source with broad application prospects. It has the characteristics of high specific capacity, high power, long life, wide working temperature limit, and maintenance-free. [0003] According to the different energy storage principles, supercapacitors are generally divided into two categories: one i...

Claims

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Application Information

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IPC IPC(8): H01G9/04
Inventor 张熙贵华黎安仲勋曹小卫虞佳菲
Owner SHANGHAI AOWEI TECH DEV
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