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Hybrid capacitor

A technology of hybrid capacitors and current collectors, applied in the direction of hybrid capacitor electrodes, hybrid capacitor collectors, etc., to achieve the effect of suppressing the reduction of durability and excellent input and output characteristics

Active Publication Date: 2022-03-18
TEIKOKU PISTON RING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is believed that if the temperature rises by 10°C from room temperature, the loss rate will be approximately doubled

Method used

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  • Hybrid capacitor

Examples

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Effect test

Embodiment 1

[0070] In an argon-tight vessel, to a solution containing LiCl and KCl at a ratio of 50:50 by weight percent concentration (wt%), 5 mol% of CaC 2 , dissolved at 500°C as a molten salt bath. Aluminum foil (thickness 50 μm) was used for the anode, and gradient carbon was used for the cathode. Use 3mA / cm 2 Electrolysis was carried out at a constant current for 25 minutes, and carbon was plated on an aluminum foil with a purity of 99.99% (thickness: 50 μm) to obtain the current collector on the positive side of this example.

[0071] The cross section of the current collector was observed by SEM, and the thickness (film thickness) of the carbon plating film was measured to be 3 μm. In addition, using soft X-ray XANES (X-ray Absorption Near Edge Structure) to measure sp 2 Structural ratio sp 2 / (sp 2 +sp 3 ) is 83%.

[0072] As the positive electrode active material, graphite (trade name: KS-6), acetylene black (conductive material), polyvinylidene fluoride (organic solvent ...

Embodiment 2

[0076] A 2032-type coin cell was produced in the same manner as in Example 1, except that an aluminum foil covered with carbon plating was used as a current collector on the negative electrode side as in Example 1 on the positive electrode side.

Embodiment 3

[0078] A 2032-type coin cell was produced in the same manner as in Example 1 except that artificial graphite (trade name: MCB6-10) manufactured by Osaka Gas Chemical Co., Ltd. was used as the positive electrode active material.

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Abstract

In a hybrid capacitor according to the present invention, a positive electrode contains graphite as a positive electrode active material, a current collector on the positive electrode side is an aluminum material, and the aluminum material is covered with a carbon plating film in which the content ratio of an sp2 structure, sp2 / (sp2 + sp3), is 80% or more.

Description

technical field [0001] The present invention relates to hybrid capacitors. [0002] This application claims priority from Patent Application No. 2019-116704 filed in Japan on June 24, 2019, the contents of which are incorporated herein by reference. Background technique [0003] As a technique for storing electric energy, an electric double layer capacitor (for example, refer to Patent Document 1) and a secondary battery are known. Electric double-layer capacitors (EDLC: Electric double-layer capacitor) are far superior in life, safety, and output density to secondary batteries. However, electric double layer capacitors have a problem of low energy density (volume energy density) compared with secondary batteries. [0004] Herein, the energy (E) stored in the electric double layer capacitor is expressed using the capacitance (C) of the capacitor and the applied voltage (V): E=1 / 2×C×V 2 , the energy is proportional to the capacitance and the square of the applied voltage. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/68H01G11/32
CPCH01G11/68H01G11/32H01G11/36H01G11/70H01G11/42Y02E60/13
Inventor 小林直哉芳尾真幸
Owner TEIKOKU PISTON RING CO LTD
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