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Electrode and electrochemical element usng said electrode

A technology of electrochemical components and electrodes, applied in the field of electrochemical components, can solve problems such as low cycle characteristics, inability to obtain practical applications, and difficulty in inhibiting the dissolution of active substances

Active Publication Date: 2004-10-13
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even with a theoretically high energy density, it is difficult to suppress the elution of the active material into the electrolyte, so it cannot be used in practical applications.
Therefore, in a battery using an organic compound as an electrode active material, although it has the characteristics of light weight and high energy density, the active material is easily eluted into the electrolyte, so the cycle characteristics are low.

Method used

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  • Electrode and electrochemical element usng said electrode
  • Electrode and electrochemical element usng said electrode
  • Electrode and electrochemical element usng said electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] (1) Manufacturing of test electrodes

[0081] 100 parts by weight of a mixed solvent of hexadecane and chloroform with a volume ratio of 4:1 and 5 parts by weight of the aforementioned general formula (1) as the active substance:

[0082]

[0083] (In the formula, n=1 and M is hydrogen.) The compounds shown are mixed together to produce a treatment liquid. In 100ml of the treatment solution, 10g of activated carbon treated with ozone at 120°C for 10 minutes was immersed, and then stirred for 12 hours. After ozone treatment, a large number of functional groups on the surface of activated carbon are converted into hydroxyl groups.

[0084] The activated carbon was filtered out from the treatment liquid, and then immersed in 100 ml of chloroform, and stirred for 1 hour. Then, the activated carbon was filtered out from the chloroform, and again immersed in 100 ml of chloroform and stirred for 1 hour to wash the activated carbon. The cleaned activated carbon is filtered out an...

Embodiment 2

[0093] In addition to using the compound represented by the following general formula (3)

[0094]

[0095] (In the formula, n=1 and M is a hydrogen atom) A composite material with activated carbon supporting the active material was obtained in the same manner as in Example 1 except that the active material was used.

[0096] Whether the active material is supported on the activated carbon by a covalent bond was determined according to the same IR measurement as in Example 1. The result is 2500cm -1 Nearby peaks from S-H, 750 cm and 1250 cm -1 Nearby peak from C-S-C bond, 3000cm -1 Nearby by CH 2 The coming peaks were observed separately. Based on this, it is proved that the active material is supported by the covalent bond on the activated carbon.

[0097] Using this composite material, a test electrode was produced in the same manner as in Example 1. Then, using the test electrode, a coin-type battery was manufactured in the same manner as in Example 1.

Embodiment 3

[0099] In addition to using the compound represented by the following general formula (4)

[0100]

[0101] (In the formula, n=1) Except for the active material, the same method as in Example 1 was followed to obtain a composite material having activated carbon supporting the active material.

[0102] According to the same method as in Example 1, it was determined whether the active material was supported on the activated carbon by the covalent bond by IR measurement. The results were observed separately, 1500cm -1 Nearby peak from N-O, 2800cm -1 Nearby by CH 2 The peak from the chain, 3000cm -1 Nearby peaks derived from cyclohexane, and 1100 cm -1 The nearby peak comes from Si-O. According to this, it is proved that the active material is supported by the covalent bond on the activated carbon.

[0103] Using this composite material, a test electrode was manufactured in the same manner as in Example 1. Then, using the test electrode, a coin-type battery was manufactured in the s...

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Abstract

An electrode for an electrochemical device includes an organic compound that serves as an active material and a substrate carrying the organic compound. The substrate and the organic compound are held together by a covalent bond. Accordingly, it is possible to suppress the dissolving of the active material into an electrolyte.

Description

Technical field [0001] The present invention relates to an electrode and an electrochemical element using the electrode. Background technique [0002] In recent years, with the development of mobile communication equipment and portable electronic equipment, the demand for power sources has also increased. Among the batteries, lithium secondary batteries that can be repeatedly charged and discharged have been widely used as power sources for portable electronic devices due to their high potential, high energy density, and reusability. [0003] However, with the development of portable electronic equipment in the direction of miniaturization and light weight, there is an increasing demand for increasing the energy density of batteries, and it is more desirable to develop new electrode materials with high energy density. Based on this background, since increasing the energy density of batteries is directly related to increasing the energy density of electrode materials, the developm...

Claims

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Application Information

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IPC IPC(8): H01M4/02H01M4/137H01M4/60H01M4/64H01M4/66H01M10/052H01M10/0562H01M10/36
CPCY02E60/122H01M4/60H01M10/052H01M4/137H01M10/0562Y02E60/10
Inventor 稻富友岛田干也美浓规央北条伸彦
Owner PANASONIC CORP