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Manganous-manganic oxide self-supporting composite electrode as well as preparation method and application thereof

A technology of trimanganese tetraoxide and composite electrodes, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., and can solve problems such as non-self-supporting electrodes

Inactive Publication Date: 2019-03-12
XINXIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical solution is to first prepare the copper-nickel alloy substrate, then vapor-phase deposit graphene, then remove the copper-nickel alloy to obtain a whole piece of graphene, and then chemically grow trimanganese tetraoxide, and finally obtain a three-dimensional graphene / manganese tetraoxide Trimanganese composites, but are not self-supporting electrodes since there is no current collector

Method used

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  • Manganous-manganic oxide self-supporting composite electrode as well as preparation method and application thereof
  • Manganous-manganic oxide self-supporting composite electrode as well as preparation method and application thereof
  • Manganous-manganic oxide self-supporting composite electrode as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0020] (1) Cut foam nickel (NF) into shaped structure, put it into a beaker, add acetone, and ultrasonically clean it for 10 minutes in an ultrasonic cleaner. Then, put it in a vacuum drying oven at 80°C for 24 hours;

[0021] (2) Place the NF in (1) in a flat-bottomed crucible, then put the crucible into a high-temperature tube furnace, evacuate the tube furnace, and feed Ar (200 sccm) and H 2 (100sccm), the high temperature tube furnace program is set to 50 ℃ min -1 The temperature was raised to 1000°C at a rate of 10 minutes, and then CH 4 (100sccm), followed by constant temperature for 1h, after reaching the time, turn off H 2 and CH 4 , after cooling down to room temperature naturally, turn off the Ar to get nickel foam / graphene (NF / graphene electrode)

[0022] (3) Configure the mixed solution of 0.5M manganese chloride and 0.5M potassium nitrate as the electrolyte, use the prepared nickel foam / graphene electrode as the working electrode, the platinum sheet as the a...

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Abstract

The invention discloses a manganous-manganic oxide self-supporting composite electrode as well as a preparation method and application thereof. An NF / graphene / Mn3O4 self-supporting composite electrodeis prepared by adopting vapor deposition and electrodeposition methods. The electrode has higher capacity, higher energy density and longer cycling stability.

Description

technical field [0001] The invention relates to a supercapacitor electrode preparation technology, in particular to a trimanganese tetraoxide self-supporting composite electrode and a preparation method and application thereof. Background technique [0002] Research on electrode materials is a hot spot in the field of supercapacitors. Among various manganese oxide electrode materials, Mn 3 o 4 Because of high capacity, low cost, mixed valence and other properties, researchers are favored by researchers, but the conductivity of the material is relatively poor, usually only 10 –7 –10 –8 Scm –1 , the low electronic conductivity limits the further application of this material in the field of supercapacitors. In order to increase the Mn 3 o 4 Conductivity, often using various carbon materials to compound it, graphene and Mn 3 o 4 The composite is one of the more researched materials. Analysis on graphene / Mn 3 o 4 It can be found in the relevant literature of composite...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/26H01G11/28H01G11/46
CPCH01G11/26H01G11/28H01G11/46H01G11/86Y02E60/13
Inventor 杨杰陈改荣王刘杰马志华李鹏发司江菊
Owner XINXIANG UNIV
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