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Energy storage device

A technology for energy storage devices and electrode materials, which can be used in the manufacture of hybrid/electric double-layer capacitors, electrical components, electrolytic capacitors, etc., and can solve problems such as device performance degradation

Active Publication Date: 2010-01-27
LS MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem of device performance degradation caused by this residual moisture, the present invention proposes a density value and a thickness value of the electrode material

Method used

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Examples

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example 1

[0078] Mix LiMn in a weight ratio of approximately 80:15:5 2 o 4, conductive material and binder to prepare cathode electrode slurry. A slurry for the anode electrode was prepared by mixing activated carbon, conductive material, and binder in a weight ratio of about 80:15:5. Each slurry was coated on an aluminum current collector to form a cathode electrode and an anode electrode. At this time, superfine carbon powder (super P) is used as a conductive material, and a mixture of PTFE, CMC and SBR is used as a binder. The slurry-coated current collector was compressed by applying pressure thereto, and dried in a vacuum oven at about 120° C. for about 48 hours.

[0079] A capacitor cell is fabricated using a pair of electrodes, a separator, and an electrolyte. At this time, the separator was a porous cellulose-based separator, and the capacitor unit was cylindrical. Et dissolved in acetonitrile solvent 4 NBF 4 and LiBF 4 used as an electrolyte. The capacitor unit charges...

example 2

[0090] Mix LiMn in a weight ratio of approximately 80:15:5 2 o 4 , conductive material and binder to prepare cathode electrode slurry. A slurry for the anode electrode was prepared by mixing activated carbon, conductive material, and binder in a weight ratio of about 80:15:5. Each slurry was coated on an aluminum current collector to form a cathode electrode and an anode electrode. At this time, ultra-fine carbon powder is used as a conductive material, and a mixture of PTFE, CMC and SBR is used as a binder. The current collector coated with the slurry was compressed by applying pressure thereon, and dried in a vacuum oven at about 120° C. for about 48 hours.

[0091] A capacitor cell is fabricated using a pair of electrodes, a separator, and an electrolyte. At this time, the separator is a porous cellulose-based separator, and the capacitor unit has a cylindrical shape. LiBF dissolved in acetonitrile solvent 4 used as an electrolyte. The capacitor unit is charged / disch...

example 3

[0109] Dissolve 1M LiBF in a mixed solvent of propylene carbonate (PC: propylene carbonate) and ethylene carbonate (EC: ethylenecarbonate) 4 An electrolyte was prepared with 1M TEATFB (tetraethylammonium tetrafluoroborate) as an electrolyte salt. The conductivity of the electrolyte was measured by an Orion Conductivity Meter.

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Abstract

Disclosed is an energy storage device, in which an electrode material including an aqueous solvent, a binder and a transition metal oxide containing lithium is used to form one electrode, and an electrode material including activated carbon is used to form the other electrode. In particular, the energy storage device ensures reliability and maximum capacitance efficiency by optimizing density and thickness values of the electrode materials for the cathode electrode and the anode electrode.

Description

technical field [0001] The present invention relates to an energy storage device, and more particularly, to an energy storage device ensuring high energy density and reliability. In particular, the present invention relates to energy storage devices with maximum capacitive efficiency by optimizing the density and thickness values ​​of the electrode materials used for the electrodes. Background technique [0002] In general, typical devices for storing electrical energy include batteries and capacitors. [0003] Supercapacitors (also known as supercapacitors) are energy storage devices with properties intermediate between electrolytic capacitors and secondary batteries. Because of their high efficiency and semi-permanent lifetime characteristics, supercapacitors are considered as next-generation energy storage devices that can be used with or replace secondary batteries. [0004] According to the energy storage mechanism, supercapacitors can be divided into electric double ...

Claims

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Application Information

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IPC IPC(8): H01G9/155H01G9/058H01G9/038H01G11/30H01G11/58
CPCY02E60/13H01G11/32H01G11/50H01G11/58H01G11/86
Inventor 李河泳姜镇娥朴从硕金俊浩
Owner LS MATERIALS CO LTD
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