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Super capacitor electrode material and preparation method thereof

A technology for supercapacitors and electrode materials, applied in the field of nanomaterials, can solve the problems of not forming nanorod arrays and unsatisfactory specific capacitance values, and achieve the effects of improving utilization, reducing electrode dead area, and increasing contact area.

Inactive Publication Date: 2017-10-20
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the zinc cobaltate nanorods obtained by this method do not grow in an orderly manner on the surface of the nickel foam, and no nanorod array is formed, and the specific capacitance obtained when the composite electrode is used as a supercapacitor working electrode is not ideal, especially under high current density conditions

Method used

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  • Super capacitor electrode material and preparation method thereof
  • Super capacitor electrode material and preparation method thereof
  • Super capacitor electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038]Step 1: Dissolve 1 mmol of zinc nitrate hexahydrate in 15 mL of deionized water and stir for 30 minutes; 2 mmol of cobalt nitrate hexahydrate in 15 mL of deionized water and stir for 30 minutes; 2 mmol of ammonium fluoride and Add 3 mL of deionized water to 5 mmol of urea to dissolve it, then add 37 mL of pure ethanol and stir for 30 minutes, then add zinc nitrate and ammonium fluoride-urea dropwise to zinc nitrate, and stir the mixed solution for 30 minutes minute;

[0039] Step 2: Pour the treated nickel foam and the prepared solution into the reaction kettle, and react at 150°C for 9 hours to obtain the electrode precursor;

[0040] Step 3: After the reaction, cool the reactor to room temperature naturally, take out the electrode precursor, wash it with deionized water and ethanol, and dry it after ultrasonic

[0041] Step 4: Put the dried electrode into a tube furnace, calcinate it under a nitrogen atmosphere, set the temperature rise gradient to 2 °C / min, keep it a...

Embodiment 2

[0045] Step 1: Dissolve 1 mmol of zinc nitrate hexahydrate in 15 mL of deionized water and stir for 30 minutes; 2 mmol of cobalt nitrate hexahydrate in 15 mL of deionized water and stir for 30 minutes; 2 mmol of ammonium fluoride and Add 5 mmol of urea to 3 mL of deionized water to dissolve it, then add 37 mL of ethanol and stir for 30 minutes, then add zinc nitrate and ammonium fluoride-urea dropwise to zinc nitrate, and stir the mixed solution for 30 minutes;

[0046] Step 2: Pour the treated nickel foam and the prepared solution into the reaction kettle, and react at 160 ° C for 8 hours to obtain the electrode precursor;

[0047] Step 3: After the reaction, cool the reactor to room temperature naturally, take out the electrode precursor, wash it with deionized water and ethanol, and dry it after ultrasonic

[0048] Step 4: Put the dried electrode into a tube furnace, calcinate it under a nitrogen atmosphere, set the temperature rise gradient to 5 °C / min, keep it at 400 °C f...

Embodiment 3

[0051] Step 1: Dissolve 1 mmol of zinc nitrate hexahydrate in 15 mL of deionized water and stir for 30 minutes; 2 mmol of cobalt nitrate hexahydrate in 15 mL of deionized water and stir for 30 minutes; 2 mmol of ammonium fluoride and Add 5 mmol of urea to 3 mL of deionized water to dissolve it, then add 37 mL of ethanol and stir for 30 minutes, then add zinc nitrate and ammonium fluoride-urea dropwise to zinc nitrate, and stir the mixed solution for 30 minutes ;

[0052] Step 2: Pour the treated nickel foam and the prepared solution into the reaction kettle, and react at 140 ° C for 10 hours to obtain the electrode precursor;

[0053] Step 3: After the reaction, cool the reactor to room temperature naturally, take out the electrode precursor, wash it with deionized water and ethanol, and dry it after ultrasonic

[0054] Step 4: Put the dried electrode into a muffle furnace, calcinate it under a nitrogen atmosphere, set the temperature rise gradient to 5 °C / min, keep it at 450...

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Abstract

The invention discloses a super capacitor electrode material and a preparation method thereof. According to the electrode material, a conductive agent and a binder are not used, a hydrothermal method is used to directly attach an active material to a surface of a flexible conductive substrate, and then the material is subjected to high temperature calcination in a muffle furnace to obtain a final electrode material. Since the conductive agent and the binder are not used, the fast transfer of ions is facilitated by a growth method, for an electrode with a blocked mass transfer process, the electrode impedance is effectively reduced by the growth method, the electrode specific capacity is improved, through a test, the specific capacity can reach 1590.4F / G in current density of 1 A / g, the electrode still can maintain 102% capacity after 10000 cycles under the current density of 10 A / g, and the electrode material has an industrialization prospect.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a supercapacitor electrode material and a preparation method thereof. Background technique [0002] For a long time, due to the development of human civilization, traditional fossil energy such as coal, oil, and natural gas has been widely used as power generation energy, but this has caused a series of problems such as energy crisis and environmental pollution. Therefore, human beings have focused on the development of solar energy. Thermal energy, water energy and other new energy sources, but these new energy sources are too dependent on natural environmental conditions and the energy generated is relatively unstable, which has caused great losses to traditional energy storage devices, and thus has become a new energy development process. bottleneck. Therefore, research on energy storage devices has also become one of the hot spots in the development o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/30H01G11/46H01G11/24H01G11/86
CPCH01G11/24H01G11/26H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 赵智洋焦新艳郝青丽周文昭蒋宇轩
Owner NANJING UNIV OF SCI & TECH
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