Electrolyte for supercapacitor and supercapacitor

A supercapacitor and electrolyte technology, applied in the direction of hybrid capacitor electrolyte, etc., can solve the problems of supercapacitor difficulty and work, and achieve the effect of pressure resistance, high conductivity, inhibition of crystallization and even solidification

Pending Publication Date: 2022-03-01
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 that the existing supercapacitor is difficult to work in an ultra-low temperature environment, the invention provides a supercapacitor electrolyte and a supercapacitor

Method used

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  • Electrolyte for supercapacitor and supercapacitor
  • Electrolyte for supercapacitor and supercapacitor
  • Electrolyte for supercapacitor and supercapacitor

Examples

Experimental program
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Embodiment 1

[0048] This embodiment is used to illustrate the capacitor electrolyte, supercapacitor and preparation method thereof disclosed in the present invention, including the following steps:

[0049] In the glove box, mix tetrafluoroethyl tetrafluoropropyl ether and acetonitrile, the mass ratio of the two is 1:1, mix well and then add N,N-dimethylpyrrolidine ammonium tetrafluoroborate to form electrolyte salt The concentration is 0.8mol / L electrolyte.

[0050] A supercapacitor model was assembled in a glove box: the cell consisted of two collector electrodes made of aluminum foil, two working electrodes made of activated carbon, and a fiber cloth diaphragm inserted between them. The cells were immersed in the electrolyte solutions in the following comparative examples and examples, and sealed with an aluminum case and colloidal particles to obtain a supercapacitor.

Embodiment 2～13

[0052] Embodiments 2 to 13 are used to illustrate the supercapacitor electrolyte, supercapacitor and preparation method thereof disclosed in the present invention, including most of the operating steps in Example 1, the difference being:

[0053] The main solvents, co-solvents, electrolyte salts and their addition amounts shown in Examples 2-13 in Table 1 were used.

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Abstract

In order to solve the problem that an existing supercapacitor is difficult to work in an ultralow-temperature environment, the invention provides a supercapacitor electrolyte which comprises a main solvent, an electrolyte salt and a cosolvent, the cosolvent is selected from fluoroether shown in a structural formula 1, and at least one of R1 and R2 is fluoroalkyl. Meanwhile, the invention also discloses a super capacitor comprising the super capacitor electrolyte. The super capacitor electrolyte provided by the invention effectively considers the high-temperature and ultralow-temperature electrochemical performance of the super capacitor, can stably work for a long time in a relatively wide temperature window, and is particularly suitable for being used in an ultralow-temperature environment.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to an electrolyte solution for a supercapacitor and a supercapacitor. Background technique [0002] Supercapacitor is a new type of energy storage device, which is between traditional capacitors and secondary batteries, and has the characteristics of fast charge and discharge and high energy density of traditional capacitors. Compared with traditional batteries, supercapacitors have significant advantages: higher power density (5-30kW / kg, 10-100 times that of lithium-ion batteries), which can discharge hundreds or even thousands of amperes in a short time ; Excellent cycle stability, the number of cycles can reach 1 million times; fast charging and discharging, can complete fast charging and discharging cycles in a few seconds; no self-discharge phenomenon; good safety performance, suitable for a variety of environments, widely used It is used in many fields suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/64
CPCH01G11/64Y02E60/13
Inventor 向晓霞王亚萌钱韫娴刘中波周密金丽华
Owner BASF BATTERY MATERIALS SUZHOU
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