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Super capacitor

A supercapacitor, organic electrolyte technology, applied in the direction of hybrid capacitor electrolyte, multiple hybrid/electric double layer capacitors, protection/regulating hybrid/electric double layer capacitors, etc., can solve problems such as electrochemical performance degradation

Active Publication Date: 2022-03-08
BASF BATTERY MATERIALS SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of serious degradation of electrochemical performance at low temperature in existing supercapacitors, the present invention provides a supercapacitor

Method used

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Embodiment 1

[0067] This embodiment is used to illustrate the supercapacitor disclosed in the present invention and its preparation method, including the following steps:

[0068] Preparation of organic electrolyte: take tetraethylammonium tetrafluoroborate as organic electrolyte, acetonitrile (AN) as solvent, prepare 1.0mol / L electrolyte, then add the compound shown in the structural formula 1 of mass content as shown in Table 1, An organic electrolyte is obtained.

[0069] A supercapacitor model was assembled in a glove box: the cell includes two collector electrodes made of aluminum foil, two working electrodes made of activated carbon with specific surface area and mesoporous / microporous specific surface area shown in Table 1, and a fiber cloth separator inserted between them , Immerse the cell in the organic electrolyte, and seal it with an aluminum shell and colloidal particles.

Embodiment 2～16

[0071] Embodiments 2 to 16 are used to illustrate the supercapacitor disclosed in the present invention and its preparation method, including most of the operation steps in Embodiment 1, the difference being:

[0072] Add the compound shown in the structural formula 1 in the mass content shown in Table 1 into the organic electrolyte.

[0073] Activated carbon as shown in Table 1 was used as the positive and negative electrode materials.

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Abstract

In order to solve the problem that the electrochemical performance of an existing supercapacitor is seriously degraded at low temperature, the invention provides a supercapacitor which comprises a positive electrode, a negative electrode and an organic electrolyte, the organic electrolyte comprises an organic electrolyte, a proton inert solvent and an additive, and the additive comprises a compound shown in the structural formula 1, r1-R6 are respectively and independently selected from alkyl with the carbon number of 1-5, siloxy substituted or unsubstituted by alkyl with the carbon number of 1-3, or hydrogen; the positive electrode and the negative electrode are both porous carbon materials, and the porous carbon materials and the compound shown in the structural formula 1 meet the following conditions: the supercapacitor provided by the invention has relatively low ESR (equivalent series resistance) and relatively good high and low temperature performance.

Description

technical field [0001] The invention belongs to the technical field of energy storage electronic components, and in particular relates to a supercapacitor. Background technique [0002] Supercapacitor is one of the most promising energy storage devices in the field of new energy, and is considered to be the most promising new green energy in the 21st century. Electric double-layer supercapacitors store energy by means of electrostatically polarized electrolytes. Its energy storage mechanism does not involve chemical reactions and is highly reversible. Supercapacitors have the advantages of fast charging speed, long cycle life, and high power density up to 300W / kg-500W / kg. Electrolyte and electrode materials are the two core components of supercapacitors. For electric double layer capacitors, the electrolyte is the heart of "double electricity", which is used for ion conduction between positive and negative carbon materials, and for electric double layer capacitors. Operati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/10H01G11/64H01G11/14
CPCH01G11/10H01G11/64H01G11/14Y02E60/13
Inventor 向晓霞张正生钱韫娴
Owner BASF BATTERY MATERIALS SUZHOU