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High-voltage super-capacitor

A supercapacitor, high-voltage technology, applied in hybrid capacitor electrodes, protection/regulation hybrid/electric double-layer capacitors, hybrid capacitor electrolytes, etc. The effect of reducing hydrogen bonding, low viscosity, and improving ion mobility can be achieved.

Active Publication Date: 2017-02-22
BTR NEW MATERIAL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] When the supercapacitor works at a high voltage of 3.0V, gas will be generated due to ① the decomposition of the electrolyte and the catalytic reaction caused by the free acid in the electrolyte; Or the water decomposition that is difficult to eliminate in the electrolyte produces gas, etc., the generation of the gas inside the supercapacitor causes the internal pressure to be too high, the explosion-proof valve is opened, and the supercapacitor leakage fails, as CN 1824604A discloses a kind of active carbon prepared by hard fruit shell And further prepare the method of supercapacitor, this method uses discarded hard fruit shell as raw material, obtains activated carbon through carbonization, activation, washing and drying treatment, and the activation temperature of this method is higher, and energy consumption is big; Impurities, the effect of impurity removal is average, and the cycle life and gas swelling problems of the obtained supercapacitors are difficult to solve due to the lack of post-treatment methods
This severely limits the application of supercapacitors

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0077] A 3V supercapacitor

[0078] The preparation method is as follows:

[0079] The electrolyte is a high-voltage resistant electrolyte containing quaternary ammonium salts and high-voltage stabilizers. The electrode is prepared by wet coating. The electrode auxiliary material in the electrode material is a mixture of conductive carbon black, carbon nanotubes and nano-alumina particles.

[0080] (1) Using tetrafluoroborate spirocyclic ammonium salt as electrolyte, acetonitrile as solvent, and tributylamine as high-voltage stabilizer, prepare high-voltage resistant electrolyte, and the tetrafluoroboric acid spirocyclic quaternary ammonium salt in the high-pressure resistant electrolyte The concentration of tributylamine is 1.0mol / L; the mass percentage of tributylamine is 0.5% based on 100% of the total mass of the high-voltage resistant electrolyte.

[0081] (2) In terms of mass percentage, use 5% water-based glue, 85% activated carbon, 8% conductive carbon black, 1% carbo...

Embodiment 2

[0085] A 3V supercapacitor

[0086] The preparation method is as follows:

[0087] The electrolyte is a high-voltage resistant electrolyte containing ionic liquid. The electrode is prepared by wet coating. The electrode auxiliary material in the electrode material is a mixture of conductive carbon black, carbon nanotubes and nano-alumina particles.

[0088] (1) Using 1-ethyl-3-methylimidazolium trifluoromethyl trifluoroborate EMIM-CF 3 BF 3 as the electrolyte, acetonitrile as the solvent, and prepare a high-voltage resistant electrolyte, and the EMIM-CF in the high-voltage resistant electrolyte 3 BF 3 The concentration is 1.0mol / L.

[0089] (2) In terms of mass percentage, use 5% water-based glue, 85% activated carbon, 8% conductive carbon black, 1% carbon nanotubes and 1% nano-alumina particles to make electrode materials (both as positive electrode materials and as negative electrode materials) , the specific method is: fully mix deionized water and water-based glue, ad...

Embodiment 3

[0093] A 3V supercapacitor

[0094] The preparation method is as follows:

[0095] The electrolyte is a high-voltage resistant electrolyte containing ionic liquid and high-voltage stabilizer. The electrode is prepared by wet coating. The electrode auxiliary material in the electrode material is a mixture of conductive carbon black, carbon nanotubes and nano-alumina particles.

[0096] (1) Using 1-ethyl-3-methylimidazolium trifluoromethyl trifluoroborate EMIM-CF 3 BF 3 As electrolyte, acetonitrile as solvent, triethylamine as high-voltage stabilizer, prepare high-voltage resistant electrolyte, and the EMIM-CF in the high-voltage resistant electrolyte 3 BF 3 The concentration of the triethylamine is 1.0mol / L; the mass percentage of triethylamine is 0.5% based on the total mass of the high-voltage electrolyte being 100%.

[0097] (2) In terms of mass percentage, use 5% water-based glue, 85% activated carbon, 8% conductive carbon black, 1% carbon nanotubes and 1% nano-alumina ...

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Abstract

The invention discloses a high-voltage super-capacitor. The high-voltage super-capacitor comprises a positive electrode, a negative electrode, isolation paper and high-voltage-resisting electrolyte, wherein the high-voltage-resisting electrolyte comprises dissociative salt and a high-voltage stabilizer; and an electrode material of the high-voltage super-capacitor comprises electrode auxiliary materials including carbon nanotubes, nano aluminum oxide and the like. By improving the electrolyte and the electrode material and matching with a super-capacitor single body, the voltage of the super-capacitor single body is improved to 3V, a condition that gas is generated when the super-capacitor works at high voltage is remarkably reduced, and the long durability of the super-capacitor under a 3V working voltage is really realized; and tests show that the probability of switching on an explosion-proof valve is greatly reduced when the super-capacitor is operated for 1000h at constant temperature and constant voltage of 60 DEG C and 3V in a loaded manner, the resistance after operation is 1.94 times lower than that before operation, and the capacity keeping rate is 78.50% or more.

Description

technical field [0001] The invention belongs to the field of supercapacitors, and relates to a high-voltage supercapacitor, in particular to a supercapacitor with a high working voltage of 3.0V. Background technique [0002] Due to the increasing scarcity of fossil energy and the environmental pollution caused by fossil energy, alternative green energy has attracted widespread attention. Countries around the world are competing to develop green energy products, and the development of energy storage power devices is also extremely rapid. As the core power supply components, supercapacitors are also in urgent need of development. [0003] Supercapacitors have the advantages of high power density, fast charge and discharge speed, high charge and discharge efficiency, long life, good safety, and environmental friendliness. They are widely used in wind energy, solar energy, communications, aerospace, military, backup power supply and toys. application prospects. Among them, the...

Claims

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Application Information

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IPC IPC(8): H01G11/64H01G11/46H01G11/36H01G11/18B82Y30/00B82Y40/00
CPCY02E60/13H01G11/64B82Y30/00B82Y40/00H01G11/18H01G11/36H01G11/46
Inventor 任景润汪福明任建国岳敏
Owner BTR NEW MATERIAL GRP CO LTD
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