Electrode-forming material for electrochemical capacitors

A capacitor and electrochemical technology, applied in the field of electrode formation materials for electrochemical capacitors, can solve the problems of rare ruthenium oxide, low battery voltage, high cost, etc., and achieve the effects of preventing power generation loss, large storage capacity, and long cycle life

Pending Publication Date: 2021-10-22
DAICEL CHEM IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal oxides have a problem that the applicable battery voltage is low
In addition, as metal oxides, such as ruthenium oxide, there is also a problem of high cost because it is rare and expensive.

Method used

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  • Electrode-forming material for electrochemical capacitors
  • Electrode-forming material for electrochemical capacitors
  • Electrode-forming material for electrochemical capacitors

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0128] Preparation Example 1 (Manufacture of BDND)

[0129] (generation process)

[0130] First, an electric detonator is attached to the formed explosive and placed in a pressure-resistant container for detonation (iron container, volume: 15 m 3 ), seal the container tightly. As the explosive, 0.50 kg of a mixture of TNT and RDX (TNT / RDX (mass ratio)=50 / 50) was used. Next, the electric detonator is detonated to detonate the explosive in the container. Next, let stand at room temperature for 24 hours to cool the container and its interior. After this natural cooling, the operation of scraping off the ND crude product (including the aggregates of ND particles and soot) adhering to the inner wall of the container with a scraper was performed, and the ND crude product was recovered. The recovered amount of ND crude product was 0.025 kg.

[0131] (Oxidation treatment step)

[0132] Next, the ND crude product ( 3g), concentrated sulfuric acid (80.6g) and copper carbonate (ca...

preparation example 2

[0156] Preparation Example 2 (Production of Ruthenium Oxide Nanoparticles)

[0157] RuCl in 0.1M at 0.5mL / min 3 To 100 mL, 30 mL of a 1 M aqueous NaOH solution was added. It was then stirred for 12 hours.

[0158] Then, the reaction liquid was subjected to centrifugation treatment (7500 rpm×15 minutes) to remove water, and the filtrate was further removed by suction filtration to obtain a filtrate.

[0159] The obtained filtrate was washed with water and dried under reduced pressure (at 0.08 MPa and 120° C. for 12 hours or more) to obtain ruthenium oxide nanoparticles (1). The particle diameter (D50) of the obtained ruthenium oxide nanoparticles (1) was measured by the dynamic light scattering method. The result is 50nm.

Embodiment 1

[0160] Example 1 (Production of Electrode Forming Material)

[0161] 5 mg of the obtained BDND (1) and 5 mg of the ruthenium oxide nanoparticles (1) were dispersed in 0.5 mL of 30% by mass ethanol to obtain an electrode-forming material (1) (B / (A+B): 50%).

[0162] 20 μL of the obtained electrode-forming material (1) was cast on a glassy carbon substrate as a current collector, and after heating and drying at 60° C., 5 mass % Nafion (having a hydrophobic Teflon (registered trademark) 10 μL of perfluorocarbon having a perfluoro side chain having a sulfonic acid group bonded to the skeleton was poured onto the outermost surface to obtain an electrode (1) (per 1 cm 2 BDND loading of the electrode: 2.9 mg, 2.9 mg of ruthenium oxide nanoparticles).

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Abstract

Provided is an electrode-forming material for electrochemical capacitors that is useful for forming electrodes for electrochemical capacitors having a high storage capacity and high energy density. This electrode-forming material for electrochemical capacitors includes: boron-doped nanodiamonds (A) having a specific surface area of at least 110 m<2> / g and an electrical conductivity at 20 DEG C of at least 5.0*10<-3> S / cm; and a metal oxide (B). The (B) content is 20%-95% by mass of the total content of (A) and (B).

Description

technical field [0001] The present invention relates to an electrode-forming material for electrochemical capacitors. This application claims the priority of Japanese Patent Application No. 2019-040843 for which it applied to Japan on March 6, 2019, and the content is incorporated herein by reference. Background technique [0002] It is known that when insulating diamond is doped with boron at a high concentration, holes (p-type semiconductor) are generated, thereby imparting metallic conductivity. Furthermore, it is known that boron-doped diamond (BDD: BoronDoped Diamond), in which diamond is doped with boron at a high concentration, has high physical and chemical stability derived from diamond and excellent electrical conductivity, and thus is used as an electrode Forming material (for example, Patent Document 1). [0003] In an electrochemical capacitor including an electrode containing boron-doped diamond particles, at the interface between the electrode and the electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/36H01G11/42H01G11/46
CPCH01G11/46H01G11/36H01G11/42H01G11/24Y02E60/13
Inventor 近藤刚史东条敏史汤浅真宫下健丈三木亚鸟西川正浩郑贵宽
Owner DAICEL CHEM IND LTD
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