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Power storage device, and electrode and porous sheet used in same

A technology for storage devices and electrodes, applied in battery electrodes, hybrid capacitor electrodes, lithium batteries, etc., can solve the problems of being unable to form a rocking chair-type secondary battery and making contributions to the miniaturization of power storage devices, and achieve excellent charge and discharge characteristics , Excellent effect of capacity density

Inactive Publication Date: 2015-07-08
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when a carbon material capable of intercalating and deintercalating lithium ions is used as the negative electrode active material, it is impossible to form a rocking-chair type secondary battery of a cation transfer type in which cations move between both electrodes during charging and discharging.
That is, the rocking chair type secondary battery has the advantage that a small amount of electrolyte solution is sufficient, but the above-mentioned secondary battery having a conductive polymer as the positive electrode active material is not possible, and cannot contribute to the miniaturization of the power storage device.

Method used

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  • Power storage device, and electrode and porous sheet used in same
  • Power storage device, and electrode and porous sheet used in same
  • Power storage device, and electrode and porous sheet used in same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105]

[0106] [Manufacture of positive electrode sheet containing PEDOT powder]

[0107] After mixing 4.00 g of the aforementioned PEDOT powder and 0.53 g of conductive carbon black powder (DENKA BLACK, manufactured by Denki Kagaku Kogyo Co., Ltd.), 19 g of the aforementioned 4.5% by weight poly(acrylic acid-lithium) aqueous solution (lithium conversion rate 0.5, molecular weight 80 10,000) and 16.0g of distilled water, fully stirred with a spatula. Afterwards, after implementing ultrasonic treatment for 5 minutes in an ultrasonic homogenizer, using a film rotary high-speed mixer (manufactured by PRIMIX Corporation, FILMIX 40-40 type), high-speed stirring was carried out at a peripheral speed of 20 m / min for 30 seconds to obtain Liquid paste. This paste was degassed for 3 minutes in an autorotation / revolution mixer (manufactured by THINKY, THINKY MIXER).

[0108] Next, using a desktop automatic coating device (manufactured by TESTER SANGYO CO,. LTD.), using a doctor blad...

Embodiment 2

[0118] A battery cell (lithium secondary battery) was produced in the same manner as in Example 1, except that the weight (mg) of the electrolytic solution was 3.5 times the weight (mg) of PEDOT. Then, it evaluated similarly to Example 1, and the result is shown in Table 1 mentioned later.

Embodiment 3

[0120]A battery cell (lithium secondary battery) was produced in the same manner as in Example 1, except that the weight (mg) of the electrolytic solution was 2.5 times the weight (mg) of PEDOT. Then, it evaluated similarly to Example 1, and the result is shown in Table 1 mentioned later.

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Abstract

A power storage device having an electrolyte layer and positive and negative electrodes provided so as to sandwich same therebetween. At least one electrode is a complex comprising at least a thiophene polymer (A) that changes conductivity as a result of ion insertion and removal, and polycarboxylic acid (B). The polycarboxylic acid (B) is fixed inside the electrode. As a result, a high-performance power storage device having excellent capacity density per active substance weight, and having excellent high-speed charge / discharge characteristics can be obtained.

Description

technical field [0001] The present invention relates to an electrical storage device, an electrode using the same, and a porous sheet. Specifically, it relates to an electrical storage device excellent in high-speed charge-discharge characteristics and capacity density, and an electrode and a porous sheet using the same. Background technique [0002] In recent years, with the advancement and development of electronic technology in portable PCs, mobile phones, and portable data terminals (PDAs), secondary batteries that can be repeatedly charged and discharged have been widely used as power storage devices for these electronic devices. In such electrochemical storage devices such as secondary batteries, high capacity and high-speed charge-discharge characteristics of materials used as electrodes are expected. [0003] An electrode of an electrical storage device contains an active material capable of intercalating and deintercalating ions. The intercalation and deintercalati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/137H01G11/22H01M4/36H01M4/60
CPCY02E60/122H01M4/366H01G11/48H01G11/38H01M10/052H01M4/137H01M4/604H01M4/608H01M2220/30Y02E60/10Y02E60/13
Inventor 岸井丰阿部正男大谷彰植谷庆裕森田成纪
Owner NITTO DENKO CORP
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