Cellular porous Co-W-B alloy oxide and preparation method and application thereof
A honeycomb and oxide technology, applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of complex production process, long production cycle, low specific capacity, etc., and achieve simple preparation process, low cost, simple method effect
Inactive Publication Date: 2017-10-13
GUILIN UNIV OF ELECTRONIC TECH
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[0008] The present invention aims at the technical problems existing in the prior art, utilizes metal ions to be reduced under the action of a borohydride reducing agent, obtains a Co-W-B alloy layer, and obtains honeycomb-shaped nanoparticles, and the prepared nanoparticles are extremely easy in Oxidation reaction occurs under the action of hydrogen peroxide, and the principle of Co-W-B alloy oxide is obtained, which solves: 1. The research history of activated carbon-based capacitors is long, and the current degree of commercialization is the highest, and the technology is the most mature, but its production process is complex and the production cycle is long. And the specific capacity is low; 2. Conductive polymer capacitors can show high power density, but their stability is poor. These two technical problems
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[0040] A preparation method of honeycomb porous Co-W-B alloy oxide material includes the following steps:
[0041] Step 1) Place 50 mL of alcohol solution in a 100 mL beaker, and take 0.6 g Co(NO 3 ) 2 And 0.2 g Na 2 WO 4 , Added to the alcohol solution, placed in an ultrasonic cleaner for ultrasonic dispersion for 30 minutes;
[0042] Step 2), place the alcohol solution obtained in step 1) on a magnetic stirrer and stir for 6 hours;
[0043] Step 3), weigh 2g of NaBH 4 , And then added to 15 mL of water to obtain NaBH 4 Aqueous solution, then NaBH 4 The aqueous solution is slowly added dropwise to the alcohol solution in step 2);
[0044] Step 4) After the dripping is completed, let the solution remain for 2 hours, filter, wash, and dry to obtain the body powder;
[0045] Step 5), add the powder obtained in step 4) to 10 mL of hydrogen peroxide for oxidation reaction to obtain honeycomb porous Co-W-B alloy oxide.
[0046] The microscopic morphology of the honeycomb porous Co-W-B alloy o...
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Abstract
The invention discloses a cellular porous Co-W-B alloy oxide material. A product obtained through reaction of Co(NO3)2, Na2WO4 and NaBH4 in an alcohol solution is oxidized in hydrogen peroxide so as to prepare the cellular porous Co-W-B alloy oxide material which has a cellular porous nanometer structure. The preparation method comprises a first step of adding Co(NO3)2 and Na2WO4 into the alcohol solution and performing ultrasonic dispersion; a second step of stirring the alcohol solution on a magnetic stirrer; a third step of preparing a NaBH4 water solution, and then slowly adding the NaBH4 water solution dropwise into the alcohol solution; a fourth step of after the NaBH4 water solution is added into the alcohol solution, allowing the solution to react, filtering, washing, and drying, so as to obtain solid powder; and a fifth step of oxidizing the obtained powder with hydrogen peroxide so as to obtain the cellular Co-W-B alloy oxide material. When the material is used as an electrode material of a super capacitor, charging and discharging are performed within -0.4-0.4V, and when the discharging current density is 1 A / g, specific capacitance can reach 350-550 F / g. The preparation method is easy and has mild reaction conditions, and the material has high specific surface area and good electrochemical performance, and has a bright application prospect in the field of super capacitors.
Description
Technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a honeycomb porous Co-W-B alloy oxide and a preparation method and application thereof. Background technique [0002] Supercapacitor is an environmentally friendly and irreplaceable new energy storage and energy saving device between traditional capacitors and rechargeable batteries. It not only has the characteristics of fast charging and discharging of capacitors, but also has the energy storage mechanism of electrochemical batteries. Compared with traditional capacitors, supercapacitors have the characteristics of high power density, long cycle life, no pollution, wider operating temperature range, and large dosage. It is precisely because of the above characteristics that the application of supercapacitors in the fields of electric vehicles, communications, consumer and entertainment electronics has attracted more and more attention, and supercapacitors have the hope of be...
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IPC IPC(8): H01G11/46H01G11/26H01G11/86
CPCY02E60/13H01G11/46H01G11/26H01G11/86
Inventor邹勇进殷莹向翠丽徐芬孙立贤
OwnerGUILIN UNIV OF ELECTRONIC TECH