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Negative electrode material for pseudocapacitor and method for manufacturing same

An anode material and pseudocapacitor technology, applied in the field of anode materials and their preparation, can solve the problems of low conductivity, limited anode material, low output characteristics, etc., and achieve the effect of improving capacitance and output characteristics and improving charge transfer.

Active Publication Date: 2020-04-17
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, anode materials for pseudocapacitors operating in aqueous electrolytes are limited, and it is important to study anode materials
Although vanadium oxide is known as a representative anode material, performance satisfying demands for improving low output characteristics has not yet been achieved due to low capacitance and low electrical conductivity
[0009] In addition, in order to improve capacitance and output characteristics by controlling the physical properties of vanadium oxide, various preparation methods have been studied and proposed, such as hydrothermal synthesis, precipitation reaction, etc., but the electrochemical performance has not been greatly improved

Method used

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  • Negative electrode material for pseudocapacitor and method for manufacturing same
  • Negative electrode material for pseudocapacitor and method for manufacturing same
  • Negative electrode material for pseudocapacitor and method for manufacturing same

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preparation example Construction

[0056] Specifically, in the preparation method of an anode material for a pseudocapacitor, step 1 is a step of mixing raw materials of a metal oxide, a conductive inorganic material and a doping element with a carboxylic acid complexing agent to react.

[0057] The metal oxide and conductive inorganic material are the same as described above, and may be used in amounts satisfying the above-mentioned content ranges of the metal oxide and conductive inorganic material in the composite. In addition, the metal oxide may be used in a solution state dissolved in a hydrogen peroxide solution or an acid such as hydrochloric acid, and the carbon-based material may be used in a dispersed state dispersed in water or a dispersion medium such as carboxymethylcellulose.

[0058] The raw material of the doping element can be any one or a mixture of two or more selected from sulfate, nitrate, chloride, acetate and carbonate containing the doping element, in this respect, Doping elements are t...

Embodiment 1

[0088] Will 0.9g V 2 o 5 , 30ml deionized water and 20ml H 2 o 2 Put in a round bottom flask and stir. To this was added a dispersion containing 6 g of CNTs in 30 ml of deionized water (CNTs were introduced in the form of a dispersion prepared by dispersing CNTs in CMC (carboxymethyl cellulose), 6 g of CNTs represented the CNT content in the dispersion to be introduced (CNT content in the dispersion = 5% by weight, CNT diameter = 9nm to 11nm), and 0.5mmol of Al as a raw material of the doping element was added thereto 2 (SO 4 ) 3 , followed by mixing. 100 ml of ethanol was added thereto, and to the resulting mixture was added dropwise by mixing 20 ml of L-aspartic acid (4 mol / relative to 100 parts by weight of V 2 o 5 400 parts by weight), 70 ml of deionized water and 5 ml of 6N HCl, and then reflux at 60° C. for 12 hours. The resulting precipitate was separated by centrifuge and washed with deionized water and ethanol to remove impurities. The resulting product was ...

Embodiment 2

[0090] In addition to using 1 mmol of MnSO in Example 1 4 Al instead of 0.5mmol 2 (SO 4 ) 3 Besides, V was prepared in the same manner as in Example 1 2 o 5 Metal oxide-CNT composite anode material doped with Mn.

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Abstract

The present invention provides a negative electrode material for a pseudocapacitor which has excellent specific capacitance characteristics, and a method for manufacturing the same.

Description

technical field [0001] Cross References to Related Applications [0002] This application is based on and claims priority from Korean Patent Applications No. 10-2017-0123725 and No. 10-2018-0113044 filed on September 25, 2017 and September 20, 2018, respectively, so these two applications The disclosure content of is fully incorporated in this application by reference. [0003] The invention relates to an anode material for a pseudocapacitor with excellent specific capacitance characteristics and a preparation method thereof. Background technique [0004] Electrochemical capacitors are devices that store electrical energy by forming an electric double layer between the electrode surface and an electrolyte. Unlike batteries, which generate electricity through chemical reactions, capacitors generate electricity through an electric double layer. Thus, capacitors have an almost unlimited lifespan without damage to the electrodes themselves, and can store large amounts of cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/50H01G11/86
CPCH01G11/02H01G11/24H01G11/46H01G11/86H01G11/50H01G11/36Y02E60/13B82Y30/00
Inventor 徐东勋尹锡炫柳炳国
Owner LG CHEM LTD