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Super capacitor electrolytic solution additive, electrolytic solution and application of electrolytic solution

An electrolyte additive and supercapacitor technology, applied in the direction of hybrid capacitor electrolyte, etc., can solve limited problems and achieve the effects of good solubility, high power density, and enhanced specific capacitance

Active Publication Date: 2020-08-28
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, there are still limited strategies for how to effectively increase the energy density of supercapacitors. Therefore, it is very important to develop an electrolyte additive that can further increase the energy density of supercapacitors on the premise of ensuring long cycle life and high power density. meaningful

Method used

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  • Super capacitor electrolytic solution additive, electrolytic solution and application of electrolytic solution
  • Super capacitor electrolytic solution additive, electrolytic solution and application of electrolytic solution
  • Super capacitor electrolytic solution additive, electrolytic solution and application of electrolytic solution

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Embodiment 1

[0052] This embodiment provides a supercapacitor electrolyte additive, the supercapacitor electrolyte additive includes a bispyridinium salt conjugated organic molecule; the structure of the bispyridinium salt conjugated organic molecule is shown in formula (A), and its preparation method According to the literature (K.TAKAHASHI, T.NIHIRA, K.AKIYAMA, Y.IKEGAMI, E.FUKUYO, Synthesis and Characterization of New Conjugation-Extended Viologens Involving a Central Aromatic Linking Group, J.Chem.Commun., 1992, 620-622. ) in the preparation method for preparation.

[0053]

[0054] Prepare the electrolyte containing the electrolyte additive: weigh 0.02mmol of the formula (A) compound, dissolve it in 100mL supercapacitor basic electrolyte (acetonitrile solution containing 1M LiTFSI), and obtain 0.2M formula (A) compound containing organic electrolyte.

[0055] Assemble the supercapacitor: use the ordered mesoporous carbon CMK-3 as the electrode material, the glass fiber membrane as...

Embodiment 2

[0057] This embodiment provides a supercapacitor electrolyte additive, the supercapacitor electrolyte additive includes a bispyridinium salt conjugated organic molecule; the structure of the bispyridinium salt conjugated organic molecule is shown in formula (B), and its preparation method Prepare with reference to the preparation method in the literature (Terry L.Price, Jr. and Harry W.Gibson, Supramolecular Pseudorotaxane Polymers from Biscryptands and Bisparaquats, J.Am.Chem.Soc.2018, 140(12), 4455-4465):

[0058]

[0059] Prepare the electrolyte containing the electrolyte additive: weigh 0.02mmol of the formula (B) compound, dissolve it in 100mL supercapacitor basic electrolyte (acetonitrile solution containing 1M LiTFSI), and obtain 0.2M formula (B) compound containing organic electrolyte.

[0060] Assemble the supercapacitor: use the ordered mesoporous carbon CMK-3 as the electrode material, the glass fiber membrane as the diaphragm, and the electrolyte prepared above ...

Embodiment 3

[0062] This embodiment provides a supercapacitor electrolyte additive, the supercapacitor electrolyte additive includes a bispyridinium salt conjugated organic molecule; the structure of the bispyridinium salt conjugated organic molecule is shown in formula (A):

[0063]

[0064] Prepare the electrolyte containing the electrolyte additive: weigh 0.02 mmol of the compound of formula (A), dissolve it in 100 mL of basic electrolyte for supercapacitors (ionic liquid: 1-ethyl-3-methylimidazole bistrifluoromethanesulfonyl In imine salt), obtain the organic electrolytic solution containing 0.2M formula (A) compound.

[0065] Assemble the supercapacitor: use the ordered mesoporous carbon CMK-3 as the electrode material, the glass fiber membrane as the diaphragm, and the electrolyte prepared above as the electrolyte to make a 2032 button-type supercapacitor.

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Abstract

The invention relates to a supercapacitor electrolytic solution additive, an electrolytic solution and an application of the electrolytic solution. The supercapacitor electrolytic solution additive comprises bispyridine salt conjugated organic molecules, the structure of the bispyridine salt conjugated organic molecule is shown as a formula (I), R1 and R1' are independently selected from substituted or unsubstituted alkyl, substituted or unsubstituted aryl and substituted or unsubstituted alkoxy, R2 is selected from a substituted or unsubstituted heteroaryl group and a substituted or unsubstituted five-membered heterocyclic group, and X1 and X2 are independently selected from groups consisting of fluorine-containing anions. According to the electrolytic solution additive and the electrolytic solution, the electrochemical performance of the supercapacitor can be greatly improved, the internal resistance of the electrolytic solution is effectively reduced, the current density is enhanced, and the specific capacitance, the energy density, the rate capability and the cycling stability of the supercapacitor are improved.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a supercapacitor electrolyte additive, electrolyte and application thereof. Background technique [0002] With the rapid development of portable electronic devices, wearable devices and electric vehicles, people have higher and higher requirements for energy storage devices of various electronic devices. Among many energy storage devices, supercapacitors are an efficient electrochemical Energy storage devices have the advantages of high charge and discharge rate, high power density, long cycle life, fast charging and stable performance. Therefore, supercapacitors have received increasing attention and are widely used, but compared with energy storage devices such as lithium-ion batteries, supercapacitors have lower energy density, which greatly limits the application of supercapacitors. Therefore, how to further improve the energy density of supercapacitors w...

Claims

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Application Information

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IPC IPC(8): H01G11/64
CPCH01G11/64Y02E60/13
Inventor 智林杰牛越马英杰
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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