Electrode structure, electrode, power device and method for manufacturing the same

An electrode structure and power device technology, applied in electrode manufacturing, hybrid/electric double-layer capacitor manufacturing, electrode carrier/current collector, etc. Effect

Active Publication Date: 2014-08-20
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for carbon-based materials, since the distribution of pores (pores) may be non-uniform, low electrode density may be observed due to high specific surface area, and binder materials such as polymers may be mixed to form electrodes, Therefore, the conductivity will decrease

Method used

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  • Electrode structure, electrode, power device and method for manufacturing the same
  • Electrode structure, electrode, power device and method for manufacturing the same
  • Electrode structure, electrode, power device and method for manufacturing the same

Examples

Experimental program
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Effect test

example 1

[0108] Graphene oxide was added to deionized water to obtain a solution with a graphene oxide concentration of approximately 1 mg / mL. SWCNT (Hanwha Chemical Co., Ltd., Korea) was added to the solution at about 5 wt% based on the weight of graphene oxide to prepare a mixed solution. The mixed solution was ultrasonicated for about 3 hours by using an ultrasonic cleaner (Power Sonic 470) and dispersed at 6,500 rpm for about 1 hour by using a high-speed mixer (Wise Tis). The concentration of the graphene oxide solution was increased to a range of about 5 mg / mL to about 10 mg / mL by venting through a solvent evaporation tower (BUCHI Corporation, USA). After degassing, about 300 mL to about 500 mL of the graphene oxide solution was injected into a drying rack (30 cm×30 cm). The drying rack containing the graphene oxide solution was placed in the wash station and dried for approximately 24 hours.

[0109] After finishing drying, the graphene oxide film was cut into a size of about 2...

example 2

[0114] Example 2: Sample battery manufacturing

[0115] Fabrication of sample cells was performed for water-based experiments. Prepare two antistatic slides, current collectors (about 1M H 2 SO 4 Ti foil (120 μm, 1 cm × 4 cm) for aqueous solution, and Ni foil (120 μm, 1 cm × 4 cm, Sigma-Aldrich) for 6M KOH aqueous solution), separator (Whatman filter paper), electrolyte (1M H 2 SO 4 aqueous solution, 6M KOH aqueous solution) and polyimide tape.

[0116] First, each current collector was positioned at the center of the slide and the graphene electrode structure was positioned within a range of about 1 cm to about 1.5 cm from the edge of the current collector having dimensions of about 1 cm x 4 cm. Then, the current collector excluding the graphene electrode structure and the support sheet was fixed with polyimide tape. A separator was placed between two electrodes and the two electrodes were fixed with a Teflon tape to prepare each assembled battery. Each assembled batter...

example 3

[0117] Example 3: Coin Cell Manufacturing

[0118] Separators (Celgard, LLC., 3501) and 1M 1-butyl-3-methylimidazolium tetrafluoroborate (BMIM-BF4, Sigma-Aldrich) dissolved in acrylonitrile as electrolyte were used for coin cell fabrication . Regarding the coin cell, since the graphene structure forms a rolled film after being cut open, separate use of the current collector is not required.

[0119] First, the graphene structure obtained in Example 1 was placed at the center of the aluminum bottom case and about 200 μL of electrolyte was dropped on the graphene electrode structure. Thereafter, a separator was placed thereon and about 200 μL of electrolyte was dropped on the separator. The graphene structure obtained in Example 1 was provided as a counter electrode at the center of the case, and the case was sealed to complete the fabrication of the coin cell.

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Abstract

An electrode structure includes a rolled graphene film which is wound about a central axis, and a nanomaterial dispersed on a surface of the rolled graphene film.

Description

technical field [0001] The present disclosure relates to an electrode structure having a roll shape, an electrode and an electric device including the electrode structure, and a method of manufacturing the electrode structure. Background technique [0002] Secondary batteries and electrochemical capacitors (EC) among electric devices are representatives of energy storage devices using electrochemical principles. EC utilizes the phenomenon of charge generated by simple migration of ions across the interface between electrodes and electrolytes or by surface chemical reactions. When an electrolyte solution exists between metal electrodes, electrolyte ions are adsorbed on the surfaces of the electrodes during voltage application to charge the EC. Therefore, ECs are attracting attention as advanced energy storage devices, which can be used as auxiliary batteries or as devices for replacing batteries due to the possibility of rapid charge-discharge and the characteristics of high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/86H01M4/583H01M4/24H01M4/26H01M4/133H01M4/1393H01M10/05H01M10/24B82Y30/00B82Y40/00
CPCH01M4/0471H01M4/133H01G13/02Y10S977/932H01M4/78H01M4/587H01G11/36B82Y99/00H01M4/663H01G11/50H01M10/0587H01M4/667H01M4/1393H01G11/24H01G11/28H01M4/13H01M4/04Y02E60/10Y02E60/13Y10T29/49115Y02P70/50
Inventor 尹汝兴李孝永柳晶竣权纯根崔在荣
Owner SAMSUNG ELECTRONICS CO LTD
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