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A low-noise anti-breakdown supercapacitor

A supercapacitor and anti-breakdown technology, which is applied in the manufacture of hybrid capacitor separators, hybrid capacitor electrodes, hybrid/electric double-layer capacitors, etc., can solve problems such as low strength, resistance to breakdown, and poor affinity for electrolytes. Achieve uniform porosity, increase working voltage, and good isolation performance

Active Publication Date: 2021-06-22
东佳电子(郴州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diaphragm of a supercapacitor is located between the two electrodes and is soaked in the electrolyte together with the electrodes. It plays an isolation role during repeated charging and discharging to prevent short circuit caused by contact between the two electrodes. The current diaphragm materials mainly include polypropylene diaphragm paper and battery diaphragm , there are problems of poor affinity to the electrolyte, low strength, and resistance to breakdown

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A low-noise anti-breakdown supercapacitor, comprising a casing, at least one capacitor unit connected in series, the capacitor unit comprising a first electrode, a second electrode and a diaphragm arranged between the first electrode and the second electrode, the The first electrode, the second electrode and the diaphragm are arranged in the electrolyte, the first electrode and the second electrode respectively include a current collector and an electrode material formed on the current collector, and the diaphragm is a polymer doped with ceramic micropowder. Propylene-cellulose paper, the ceramic powder is Er, Nb doped BiFeO 3 -BaTiO 3 Ceramic powder, the shell of the capacitor is wrapped with heat-conducting and sound-absorbing cotton; the current collector is graphite carbon rod, foamed nickel or platinum;

[0032] The preparation method of described diaphragm comprises the following steps:

[0033] S1. Ceramic powder preparation

[0034] Using barium titanate, bar...

Embodiment 2

[0041]A low-noise anti-breakdown supercapacitor, comprising a casing, at least one capacitor unit connected in series, the capacitor unit comprising a first electrode, a second electrode and a diaphragm arranged between the first electrode and the second electrode, the The first electrode, the second electrode and the diaphragm are arranged in the electrolyte, the first electrode and the second electrode respectively include a current collector and an electrode material formed on the current collector, and the diaphragm is a polymer doped with ceramic micropowder. Propylene-cellulose paper, the ceramic powder is Er, Nb doped BiFeO 3 -BaTiO 3 Ceramic powder, the shell of the capacitor is wrapped with heat-conducting and sound-absorbing cotton; the current collector is graphite carbon rod, foamed nickel or platinum;

[0042] The preparation method of described diaphragm comprises the following steps:

[0043] S1. Ceramic powder preparation

[0044] Using barium titanate, bari...

Embodiment 3

[0052] On the basis of embodiment 2, the electrode material of described electrode is carbonized nitrogen-doped graphene graft composite PMMA material;

[0053] The preparation of the nitrogen-doped graphene graft composite PMMA material of described carbonization comprises the following steps:

[0054] S1. Nitrogen-doped graphene

[0055] Graphene oxide is ultrasonically dispersed in absolute ethanol, the ratio of solid to liquid is 0.7g / L, urea with a mass of 1% of the solution system is added as a nitrogen source, and the ultrasonic treatment is continued to uniformly disperse the solution system, and the hydrothermal reaction is carried out in a hydrothermal reactor for 8 hours. The reaction temperature is 150-200°C, and the product is separated by centrifugation after self-cooling, washed with absolute ethanol and distilled water in turn, dried in vacuum and crushed for later use;

[0056] S2, graphene graft composite PMMA

[0057] The nitrogen-doped graphene prepared b...

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Abstract

The present invention provides a low-noise anti-breakdown supercapacitor, which includes a casing and at least one capacitor unit connected in series, and the capacitor unit includes: a first electrode, a second electrode and a first electrode arranged in the first electrode. and the diaphragm between the second electrode, the first electrode and the second electrode respectively include a current collector and an electrode material formed on the current collector, and the diaphragm is polypropylene-cellulose paper doped with ceramic micropowder, so The ceramic powder is BiFeO doped with Er and Nb 3 ‑BaTiO 3 Ceramic micropowder, the shell of the capacitor is wrapped with heat-conducting and sound-absorbing cotton. By wrapping the shell of the capacitor with heat-conducting and sound-absorbing cotton, the noise generated during operation is small, and the heat dissipation performance of the capacitor itself is not affected, so as to avoid breakdown due to overheating; rare earth doping BFBT ceramic modified separator paper has higher breakdown field strength and more uniform separator electrical properties.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a low-noise and breakdown-resistant supercapacitor. Background technique [0002] A supercapacitor is a new type of component that stores energy through an interface double layer formed between an electrode and an electrolyte, also known as an electric double layer capacitor. It is a new type of energy storage device between a traditional capacitor and a rechargeable battery. The characteristics of charging and discharging and high cycle life are widely used in the field of energy storage, but it is easy to generate heat and noise during operation. [0003] Electrodes, electrolytes, and separators have a decisive impact on the performance of supercapacitors, and compared with electrodes and electrolytes, the research on separators is less. The diaphragm of a supercapacitor is located between the two electrodes and is soaked in the electrolyte together with the electrodes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/82H01G11/52H01G11/30H01G11/32H01G11/46H01G11/84
CPCH01G11/30H01G11/32H01G11/46H01G11/52H01G11/82H01G11/84Y02E60/13
Inventor 杜嘉杰魏蓉晖
Owner 东佳电子(郴州)有限公司
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