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Supercapacitor based on nickel-based material

A supercapacitor, nickel-based technology, used in hybrid capacitor electrodes, hybrid capacitor electrolytes, etc., can solve the problem of supercapacitors not being ideal, and achieve the effects of increasing output specific capacity, improving specific capacitance, and good thermal stability.

Pending Publication Date: 2022-01-21
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although the electrochemical performance of supercapacitors has been greatly improved, the practical application of supercapacitors is still not ideal, and its electrochemical performance needs to be further improved.

Method used

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  • Supercapacitor based on nickel-based material
  • Supercapacitor based on nickel-based material
  • Supercapacitor based on nickel-based material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 1g of NiCl 2 ·6H 2 O and 1.02g Na 2 MoO 4 Dissolve in 50mL deionized water, then transfer the obtained homogeneous solution to a lined stainless steel autoclave, put a piece of clean nickel foam into the autoclave, place the autoclave in an oven at 120°C for 4 hours to obtain Nickel molybdate NiMoO 4 electrode material.

[0059] The standard three-electrode system is adopted, the Pt electrode is the counter electrode, the saturated calomel electrode is the reference electrode, nickel molybdate NiMoO 4 The electrode material is the working electrode, and 0.01mol / L, 0.02mol / L, 0.03mol / L, 0.04mol / L and 0.05mol / L of Na were tested in the 2mol / L KOH electrolyte 2 S 2 o 8 The cyclic voltammetry curve (the potential window is -0.2V to 0.6V, the scan rate is 20mV s -1 ) and constant current charge and discharge curve (current density is 1A g -1 ), the results are shown in figure 1 and figure 2 .

[0060] From figure 2 It can be seen that adding 0.04mol / L Na 2 S ...

Embodiment 2

[0062] 1.05mmol of NiCl 2 ·6H 2 O and 0.7 mmol Na 3 VO 4 Dissolve in 50mL deionized water, then transfer the obtained homogeneous solution to a lined stainless steel autoclave, put a piece of clean nickel foam into the autoclave, place the autoclave in an oven at 130°C for 3h to obtain Nickel vanadate Ni 3 V 2 o 8 electrode material.

[0063] The standard three-electrode system is adopted, the Pt electrode is used as the counter electrode, the saturated calomel electrode is used as the reference electrode, nickel vanadate Ni 3 V 2 o 8 The electrode material is the working electrode, and 0.01mol / L, 0.02mol / L, 0.03mol / L, 0.04mol / L and 0.05mol / L of Na were tested in the 2mol / L KOH electrolyte 2 S 2 o 8 The cyclic voltammetry curve (the potential window is -0.2V to 0.6V, the scan rate is 20mV s -1 ) and constant current charge and discharge curve (current density is 1Ag -1 ), the results are shown in image 3 and Figure 4 .

[0064] From Figure 4 It can be seen ...

Embodiment 3

[0066] 1g NiCl 2 ·6H 2 O was dissolved in 20 mL of deionized water, placed on a magnetic stirrer, and stirred continuously for 30 minutes to form a homogeneous solution. 0.3g of NaBH 4 and 0.06g of NaOH were dissolved in 20mL of deionized water, and then added drop by drop to the above mixed solution, and a piece of clean nickel foam was put into it, and then stirred continuously for 3 hours to obtain nickel boride NiB electrode material.

[0067]A standard three-electrode system is adopted, the Pt electrode is used as the counter electrode, the saturated calomel electrode is used as the reference electrode, and the nickel boride NiB electrode material is used as the working electrode. Add 0.01mol / L and 0.02mol respectively in 2mol / L KOH electrolyte / L, 0.03mol / L, 0.04mol / L and 0.05mol / L Na 2 S 2 o 8 The cyclic voltammetry curve (the potential window is (-0.2V to 0.6V, the scan rate is 20mV s -1 ) and constant current charge and discharge curve (current density is 1Ag -...

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Abstract

The invention relates to a supercapacitor based on a nickel-based material, belonging to the technical field of supercapacitors. The invention aims to provide a low-cost supercapacitor based on the nickel-based material. The supercapacitor comprises an electrolyte and an electrode material, wherein sodium persulfate is added into the electrolyte, and the electrode material is nickel molybdate, nickel vanadate, nickel boride, nickel phosphide, nickel hydroxide or nickel oxide. Through mutual cooperation of an electrolyte additive Na2S2O8 and the electrode material, the conductivity of the electrode is improved, the output specific capacity of the capacitor is obviously improved, and the specific capacitance of the composite material is obviously improved. A preparation method of the supercapacitor is simple, raw materials are easy to obtain, thermal stability is good, and cycle performance is excellent.

Description

technical field [0001] The invention relates to a supercapacitor based on nickel-based materials and belongs to the technical field of supercapacitors. Background technique [0002] Supercapacitor is a common electrochemical energy storage system. It has the advantages of high charge and discharge efficiency, wide operating temperature range, long service life, and environmental protection. It is widely used in various aspects of people's daily life, such as braking systems, backup power supplies, etc. . [0003] Supercapacitors are mainly composed of positive electrode materials, negative electrode materials, current collectors, separators, and electrolytes. The electrode material is an important component, and its electrochemical performance will directly affect the overall performance of the supercapacitor. The choice of electrolyte also has a great influence on the performance of supercapacitors. Because only when the electrolyte can exist stably, the supercapacitor c...

Claims

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Application Information

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IPC IPC(8): H01G11/64H01G11/46H01G11/30
CPCH01G11/64H01G11/46H01G11/30Y02E60/13
Inventor 张伟彬郭耀文龙剑平包旭张伦
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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