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Electrochemical energy storage device with high capacity and high power using conductive polymer composite

一种导电性聚合物、导电性的技术，应用在使用导电性聚合物复合材料的具有高容量和高功率的电化学贮能装置领域，能够解决电化学装置高容量、降低内电阻、高输出量等问题，达到提高简易性和成本效益的效果

Active Publication Date: 2009-05-20
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, any method capable of endowing electrochemical devices with high capacity and high output while reducing internal resistance has not been proposed

Method used

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  • Electrochemical energy storage device with high capacity and high power using conductive polymer composite
  • Electrochemical energy storage device with high capacity and high power using conductive polymer composite
  • Electrochemical energy storage device with high capacity and high power using conductive polymer composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] 1-1. Preparation of composite particles (conductive carbon / conductive polymer)

[0065] To an aqueous solution of a conductive polymer PEDOT, 2% by weight of carbon nanotubes (thickness: 20 nm, length: 5 μm) was dispersed and the resulting solution was adjusted to have an acidity of pH 3 to improve dispersibility. The homogeneously mixed PEDOT / carbon nanotube slurry is concentrated and dried to obtain a PEDOT / carbon nanotube composite material. The final composite particles have a diameter of 500 nm.

[0066] 1-2. Electrode preparation

[0067]To distilled water as a solvent, add 85% by weight of activated carbon (MSP20, Kansai Coke and Chemicals Co., Ltd.) as an electrode active material, 5% by weight of Super-P (carbon black) spherical particles with a particle diameter of 500 nm , 5% by weight of PTFE as a non-conductive binder, and 5% by weight of the PEDOT / CNT composite particles obtained as described in Example 1-1, to obtain a mixture of five components as ...

Embodiment 2

[0071] An electric double layer capacitor was provided in the same manner as described in Example 1, except that 95% by weight of activated carbon was used as the electrode active material and 5% by weight of the PEDOT / CNT composite material prepared in Example 1 was used to provide the electrodes . The capacitor obtained in this Example 2 exhibited qualities similar to the capacitor of Example 1.

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Abstract

Disclosed are composite particles comprising: (a) conductive polymer particles; and (b) conductive inorganic nanoparticles having a higher conductivity as compared to the conductive polymer, wherein the conductive inorganic nanoparticles are distributed onto the surface of the conductive polymer particles and / or inside the conductive polymer particles. An electrode comprising the composite particles and an electrochemical device including the electrode are also disclosed. When the composite particles comprising a conductive polymer and conductive inorganic nanoparticles uniformly distributed in the conductive polymer are used for forming an electrode, the amount of electrode active material contributing to the capacity of an electrochemical device increases. Thus, the electrochemical device can provide high capacity and improved lifespan characteristics.

Description

technical field [0001] The present invention relates to novel composite particles capable of imparting excellent adhesiveness, adhesion and conductivity to electrodes, and adsorption / desorption type electrochemical energy storage devices containing the composite particles. Background technique [0002] Generally, an adsorption / desorption type energy storage device includes two electrodes, a separator interposed between the two electrodes to electrically insulate them from each other, an electrolyte, and a case for containing the above-mentioned elements. Conventional batteries convert chemical energy into electrical energy through redox reactions, while adsorption / desorption energy storage devices store energy in them through surface adsorption of charges. At this time, the adsorption of charge occurs at the interface between each electrode and the electrolyte, so the above energy storage device is expected to have a higher charge / discharge rate than conventional batteries. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18H01G11/30
CPCH01M4/133Y02E60/122H01M4/622H01M4/02H01M4/587H01M4/624H01M4/364B82Y30/00H01G11/36H01G11/38H01G11/46H01G11/48Y02E60/13Y02E60/10H01B1/12H01B1/08H01B1/02
Inventor 朴宗爀李相英李玉珠
Owner LG ENERGY SOLUTION LTD
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