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Preparation method of capacitor electrode material beta-NiMoO4 and super capacitor

A technology for capacitor electrodes and supercapacitors, applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of complex preparation methods, inconvenient use, and difficult storage, and achieve simple operation steps, long cycle life, Effects that are easy to store

Active Publication Date: 2016-01-13
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its preparation method is complex
[0007] Secondly, at present, most supercapacitors made of nickel molybdate are in liquid state, which is not easy to store and has a large volume.
inconvenient to use

Method used

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  • Preparation method of capacitor electrode material beta-NiMoO4 and super capacitor
  • Preparation method of capacitor electrode material beta-NiMoO4 and super capacitor
  • Preparation method of capacitor electrode material beta-NiMoO4 and super capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A capacitor electrode material β-NiMoO 4 The preparation method:

[0037] 1. Add 0.025mol sodium molybdate dihydrate and 0.025mol nickel nitrate hexahydrate to 14ml ultrapure water, add ammonia water to 3ml ultrapure water, adjust to 8, add the 3ml ultrapure water with ammonia water to the above mixture In the solution, adjust the pH between 7-8, stir and mix until the solution is clear.

[0038] 2. Place the plain carbon cloth and / or carbon fiber soaked in the potassium permanganate solution in a closed reaction vessel, then add the mixed solution in step (1), and seal it. The sealed carbon fiber is extracted from the carbon cloth. The thickness of the carbon cloth is 0.5mm, and the area is 2cm×3cm. The airtight reaction vessel is made of materials resistant to acid, alkali, high temperature and high pressure. This experiment uses Teflon tube.

[0039] 3. Place the Teflon tube prepared in step 2 in a heating device capable of constant temperature control (such as muf...

Embodiment 2

[0042] Growth of β-NiMoO tightly wound in the middle of the carbon rod 4 carbon fiber nanowires, were grown on β-NiMoO 4 The length of the carbon rod wound by the carbon fiber of the nanowire is 2cm, and the polyvinyl alcohol-lithium chloride electrolyte is coated on the carbon fiber, and then a circle of diaphragm is wound outside the carbon fiber, and then the polyvinyl alcohol-lithium chloride electrolyte is coated with Growth of β-NiMoO 4The carbon cloth of nanowires is wound on the outer surface of the separator to obtain a wound supercapacitor. Its charge and discharge performance is shown in Figure 3(a). When the current density is 0.75A / g, it can be seen that the growth time is the longest and the performance is the best when the discharge is 8h. As shown in Figure 3(b), when the current density is 0.25A / g, the discharge time can reach 1331 seconds. Figure 3(c) knows that the maximum specific capacitance can reach 414F / g. Figure 3(d) The energy density can reach up...

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Abstract

The invention discloses a preparation method of a capacitor electrode material beta-NiMoO4. The method comprises the following steps: (1) adding sodium molybdate dehydrate and nickel nitrate hexahydrate to ultrapure water, adding ammonium hydroxide to adjust pH to be 7-8, and stirring and mixing the ammonium hydroxide until the solution is clear; (2) putting plain carbon cloth and / or a carbon fiber into an air-tight reaction container, and adding the mixed solution prepared in the step (1) for sealing; (3) heating the air-tight reaction container prepared in the step (2) in thermostatically controlled heating equipment, and growing a beta-NiMoO4 nanowire on the carbon cloth; and (4) cooling the air-tight reaction container in the step (3) to a room temperature, taking out the carbon cloth, cleaning and drying the carbon cloth, and then burning the carbon cloth in the air to obtain the carbon cloth or carbon fiber with the beta-NiMoO4 nanowire. The invention further discloses an application of the capacitor electrode material in the super capacitor. The capacitor electrode material is relatively few in controllable parameters, low in cost, mild in reaction condition, high in conductivity, good in capacitance characteristics, high energy density and power density, and relatively long in cycle lifetime.

Description

technical field [0001] The invention relates to the synthesis and application of an inorganic material, in particular to a capacitor electrode material β-NiMoO 4 Preparation method and supercapacitor. Background technique [0002] At present, the problems of energy depletion and environmental pollution are becoming more and more serious, and the development of new energy materials and new energy storage systems has become one of the world's research hotspots. With the development of science and technology and the advent of the information society, various computer-related electronic equipment, electric vehicles and household appliances are gradually popularized, and the requirements for high-performance memory backup power are getting higher and higher. At the same time, these energy storage devices not only have certain requirements for energy density, but also have higher and higher requirements for power density. [0003] However, the current batteries are limited by ma...

Claims

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Application Information

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IPC IPC(8): H01G11/46H01G11/86H01G11/30
CPCY02E60/13
Inventor 王传申张大志奚伊胡陈果
Owner CHONGQING UNIV
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