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Electrochemical device and method for manufacturing same

A manufacturing method and electrochemical technology, applied in the direction of electrochemical generators, electrolyte storage battery manufacturing, hybrid/electric double layer capacitor manufacturing, etc., can solve the problems of small capacity and difficulty in achieving high capacity, and achieve excellent reliability and long-term The effect of stable charge and discharge

Active Publication Date: 2018-07-17
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the positive electrode used in electric double layer capacitors is a polarizable electrode and has a small capacity. It is often difficult to achieve the required high capacity as long as such a positive electrode is used.

Method used

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  • Electrochemical device and method for manufacturing same
  • Electrochemical device and method for manufacturing same
  • Electrochemical device and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] (1) Production of positive electrode

[0072] An aluminum foil with a thickness of 30 μm was prepared as a positive electrode current collector. On the other hand, as the first solution, a solution containing an aniline concentration of 1 mol / L and a sulfuric acid concentration of 2 mol / L was prepared. The pH of the first solution was adjusted to 0.6, and the temperature was adjusted to 25°C.

[0073] Immerse the positive electrode current collector and the counter electrode made of stainless steel in the first solution at 10mA / cm 2 The current density of electrolytic polymerization was carried out for 20 minutes, so that the sulfate ion (SO 4 2- ) conductive polymer (polyaniline) film attached to the entire surface of the front and back of the positive electrode current collector.

[0074] The positive electrode current collector and the counter electrode having the conductive polymer film doped with sulfate ions were taken out from the first solution, and immersed...

Embodiment 2

[0084] In the production of the positive electrode material layer, the reduction condition of the conductive polymer by the reverse current was changed to a current density of 2mA / cm 2 And 15 minutes, except that, it carried out similarly to Example 1, and produced the electrochemical device (A2).

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Abstract

The electrochemical device according to the present invention is characterized by comprising: a positive electrode having a positive electrode material layer containing a conductive polymer doped witha first anion and a second anion; a negative electrode having a negative electrode material layer that occludes and releases lithium ions; and a nonaqueous electrolytic solution having lithium ion conductivity, wherein the second anion is more easily expelled from the conductive polymer than the first anion, respective mole numbers M1 and M2 of the first and second anions with which the conductive polymer is doped at a charge end stage satisfy a relationship of M1<M2, and respective mole numbers M3 and M4 of the third and fourth anions with which the conductive polymer is doped at a dischargeend stage satisfy a relationship of M3>M4.

Description

technical field [0001] The present invention relates to an electrochemical device obtained by combining a positive electrode with a positive electrode material layer containing conductive polymers and a negative electrode with a negative electrode material layer for storing and releasing lithium ions. Background technique [0002] Electrochemical devices that store electrical energy can be broadly classified into high-capacity devices that charge and discharge by Faradaic reactions and high-output devices that charge and discharge by non-Faradaic reactions. As high-capacity devices, lithium-ion secondary batteries are the mainstream, and as high-output devices, electric double-layer capacitors are representative. [0003] In recent years, attention has also been drawn to electrochemical devices having performance intermediate between lithium ion secondary batteries and electric double layer capacitors (see Patent Document 1). For example, a lithium ion capacitor has a struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/48H01G11/06H01G11/86H01M4/137H01M4/1399H01M4/60H01M10/052H01M10/0566
CPCH01G11/06H01G11/48H01G11/86H01M4/137H01M4/1399H01M4/60H01M10/052H01M10/0566H01G11/62Y02P70/50Y02E60/13H01G11/50H01G11/60H01M4/606H01M10/0525H01M10/0569H01M10/058H01M2004/028H01M2300/0037
Inventor 野本进伊藤靖幸松村菜穗林宏树安久津诚远藤东吾
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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