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Positive material for super capacitor, preparation method of positive material and super capacitor employing positive material

A technology for supercapacitors and positive electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, and can solve the problems of low life expectancy of specific capacitance

Inactive Publication Date: 2016-02-17
上海华东电信研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The supercapacitors made of the positive electrode materials of the above prior art all have the disadvantages of low specific capacitance and short life when the specific capacitance is high.

Method used

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  • Positive material for super capacitor, preparation method of positive material and super capacitor employing positive material
  • Positive material for super capacitor, preparation method of positive material and super capacitor employing positive material
  • Positive material for super capacitor, preparation method of positive material and super capacitor employing positive material

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preparation example Construction

[0043]The preparation method of the supercapacitor positive electrode of the present invention comprises the following five steps respectively: the first step is to make the electrode active material NiL 2 (H 2 O) 4 , conductive agent and binder are mixed in a beaker according to the mass ratio of 75:20:5; the second step is to add absolute ethanol to the above beaker, so that the absolute ethanol is immersed in the beaker; the third step is to put the above beaker Place on a magnetic heating stirrer and stir for 1 hour; the fourth step is to use a scraper to coat the material in the beaker on the positive electrode current collector; the last step is to place the coated positive electrode current collector in an electric heating constant temperature blast drying oven, Place at constant temperature at 100°C for 1 hour.

[0044] In the supercapacitor of the present invention, the electrolytic solution is KOH or NAOH with a concentration of 6 mol / liter.

[0045] The specific ...

Embodiment 1

[0047] Weigh 15 grams of NiL separately 2 (H 2 O) 4 (L=4-pyridinecarboxylate), 4 grams of superconducting carbon black and 1 gram of polytetrafluoroethylene are put into a beaker, after mixing evenly, add an appropriate amount of absolute ethanol until the substance in the beaker is submerged, and then place the beaker under magnetic heating After stirring on the stirrer for 1 hour, use a spatula to coat the material in the stirred beaker on the nickel foam of the positive current collector, and the nickel foam size is 1 × 1cm 2 , thus making the positive electrode material of the supercapacitor. We use a three-electrode system for cyclic voltammetry test to test the specific capacitance of the positive electrode material, choose 3 × 5cm 2 The size of the platinum sheet and the saturated calomel electrode (SCE) were used as the auxiliary electrode and the reference electrode, and the positive electrode material made by us was used as the working electrode. The test system w...

Embodiment 2

[0049] Weigh 15 grams of NiL separately 2 (H 2 O) 4 (L=4-pyridinecarboxylate), 4 grams of acetylene black and 1 gram of polyvinyl alcohol are put into a beaker, after mixing evenly, add an appropriate amount of absolute ethanol until the substance in the beaker is submerged, and then place the beaker on a magnetic heating stirrer After stirring for 1 hour, use a spatula to coat the contents of the stirred beaker on the copper foil of the positive electrode current collector, and the size of the copper foil is 1×1cm 2 , thus making the positive electrode material of the supercapacitor. We adopt three-electrode system to carry out cyclic voltammetry test, to test the specific capacitance of positive electrode material of the present invention, select 3 * 5cm for use 2 The size of the platinum sheet and the saturated calomel electrode (SCE) were used as the auxiliary electrode and the reference electrode, and the positive electrode material made by us was used as the working e...

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Abstract

The invention relates to a positive material for a super capacitor, a preparation method of the positive material and the super capacitor employing the positive material. The positive material is prepared from an active electrode material NiL<2>(H<2>O)<4>, a conductive agent, a binder and a positive current collector, wherein L is 4-pyridine carboxylate. The preparation method of the positive material comprises the following steps: mixing the active electrode material NiL<2>(H<2>O)<4>, the conductive agent and the binder in a beaker at the ratio; adding absolute ethyl alcohol to the beaker until the absolute ethyl alcohol immerses the materials in the beaker; stirring the beaker on a magnetic heating stirrer; coating the positive current collector with the materials in the beaker by a scraping knife; and putting the coated positive current collector into an electrically heated constant-temperature drying oven at a constant temperature below 100 DEG C until the positive material is obtained. The invention further relates to the super capacitor employing the positive material. The specific capacitance of the super capacitor prepared from the positive material in an experimental condition can reach 1149F / g; and the super capacitor is relatively long in lifetime, can be widely applied to the fields of consumer electronics, uninterrupted power supply systems, hybrid power supply systems for electric vehicles and the like.

Description

technical field [0001] The invention relates to a positive electrode material for a supercapacitor, a preparation method thereof and a supercapacitor using the positive electrode material. Background technique [0002] A supercapacitor is a new type of energy storage element between conventional capacitors and secondary batteries. It has dual functions between capacitor and battery, its power density is much higher than that of ordinary batteries, and its energy density is much higher than that of capacitors. It has the advantages of small size, large capacity, fast charging speed, and long life. It is used in consumer electronics, Uninterruptible power supply systems, hybrid power systems for electric vehicles and other fields have broad application prospects. Supercapacitors are divided into carbon-based supercapacitors (electric double layer capacitors) and quasi-capacitive capacitors with metal oxides and conductive polymers as electrode materials according to the energ...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/50
CPCY02E60/13
Inventor 郑忠斌廖晨敏马鑫余乃平尤金军韩兆祥张旖静夏林娟白志强李悦秦亚宾
Owner 上海华东电信研究院
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