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A kind of supercapacitor electrode material with cage-like structure and preparation method thereof

A technology of supercapacitor and electrode material, applied in supercapacitor electrode material and preparation, with cage-like carbon ball@lamellar NiCo2S4 material and preparation field, can solve the difficulty of preparation, high price, and difficulty in commercializing large-scale carbon nanomaterials production and other problems, to achieve the effect of increasing the effective contact area, low cost and high conductivity

Active Publication Date: 2018-10-19
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although carbon nanotubes, graphene, carbon fibers, and carbon cloths combined with NiCo 2 S 4 Composite electrode materials have high conductivity and excellent supercapacitive performance, but these carbon nanomaterials are difficult to prepare, expensive, and difficult to commercialize large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The steps are:

[0031] 1) Preparation of carbon spheres

[0032] Fully dissolve 3g of glucose in 60ml of distilled water, then move it into a reaction kettle lined with polytetrafluoroethylene, and heat it in a blast drying oven at 150°C for 8 hours. The product obtained by hydroheating is washed, filtered and vacuum-dried at 80°C , to obtain caged carbon spheres;

[0033] 2) Grouping of carbon spheres

[0034] Add the carbon spheres obtained in step 1) into 100ml of 50% sulfuric acid, reflux at 150°C for 5h, then cool, filter and dry, so that the surface of the carbon spheres has a certain amount of carboxyl, hydroxyl and sulfonic acid groups, and simultaneously make The surface of the carbon sphere has a negative charge;

[0035] 3) Lamellar NiCo 2 S 4 Precursor preparation

[0036] 1mmol Ni(NO 3 ) 2 ·6H 2 O and 2mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 10ml diethylene glycol and 10ml distilled water and stirred uniformly to obtain solution A; 9mmol urea...

Embodiment 2

[0041] The steps are:

[0042] 1) Preparation of carbon spheres

[0043] Fully dissolve 3g of glucose in 60ml of distilled water, then move it into a polytetrafluoroethylene-lined reaction kettle, and heat it in a blast drying oven at 200°C for 4 hours. The product obtained by hydroheating is washed, filtered and dried in vacuum at 80°C , to obtain caged carbon spheres;

[0044] 2) Grouping of carbon spheres

[0045] Add the carbon spheres obtained in step 1) into 100ml of 50% sulfuric acid, reflux at 100°C for 10h, then cool, filter and dry, so that the surface of the carbon spheres has a certain amount of carboxyl, hydroxyl and sulfonic acid groups. The surface of the carbon sphere has a negative charge;

[0046] 3) Lamellar NiCo 2 S 4 Precursor preparation

[0047] 1mmol Ni(NO 3 ) 2 ·6H 2 O and 2mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 10ml diethylene glycol and 10ml distilled water and stirred uniformly to obtain solution A; 9mmol urea was dissolved in 10ml di...

Embodiment 3

[0052] The steps are:

[0053] 1) Preparation of carbon spheres

[0054] Fully dissolve 3g of glucose in 60ml of distilled water, then move it into a reaction kettle lined with polytetrafluoroethylene, heat it in a blast drying oven at 160°C for 4 hours, and wash the product obtained by the water heat, filter it with suction and dry it in vacuum at 80°C , to obtain caged carbon spheres;

[0055] 2) Grouping of carbon spheres

[0056] Add the carbon spheres obtained in step 1) into 100ml of 50% sulfuric acid, reflux at 120°C for 8h, then cool, filter and dry, so that the surface of the carbon spheres has a certain amount of carboxyl, hydroxyl and sulfonic acid groups. The surface of the carbon sphere has a negative charge;

[0057] 3) Lamellar NiCo 2 S 4 Precursor preparation

[0058] 1mmol Ni(NO 3 ) 2 ·6H 2 O and 2mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 10ml diethylene glycol and 10ml distilled water and stirred uniformly to obtain solution A; 9mmol urea was diss...

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Abstract

The present invention relates to a super capacitor electrode material having a cage structure. The material is formed by a nuclear shell structure of a cage carbon sphere and the lamellar NiCo2S4, and the lamellar NiCo2S4 wraps the internal carbon sphere to form the cage structure. According to the present invention, the cage carbon sphere is constructed firstly, and then various functional groups are introduced, thereby assembling the lamellar NiCo2S4 effectively. By applying the cage carbon sphere @ lamellar NiCo2S4 material to the super capacitor electrode material, on one hand, the advantage that the cage carbon sphere material is high in conductivity, large in specific surface area and good in dispersity is utilized, and the effective contact area of the electrode material and an electrolyte is improved; on the other hand, a higher working voltage window can be obtained by utilizing the abundant pore structure of the lamellar NiCo2S4 and the Co3+ / Co2+ and Ni3+ / Ni2+ redox electron pairs, thereby improving the specific capacitance and the cyclic charging and discharging stability of the super capacitor electrode material.

Description

technical field [0001] The invention relates to a supercapacitor electrode material with a cage structure and a preparation method thereof, in particular to a cage-like carbon sphere@lamellar NiCo 2 S 4 A material and a preparation method belong to the field of material preparation. Background technique [0002] In recent years, supercapacitors have attracted extensive attention due to their many advantages such as high power density, short charging time, and long cycle life. Electrode material is a key factor affecting the performance of supercapacitors, with RuO 2 Such noble metal oxides have large specific capacitance due to their pseudocapacitive principle, but their high price and toxicity limit their commercial application. Some cheap metal sulfides instead of noble metals as supercapacitor electrode materials have become a research hotspot. NiCo 2 S 4 It is a typical spinel structure composite metal sulfide with Co 3+ / Co 2+ and Ni 3+ / Ni 2+ The redox pair c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/86
CPCY02E60/13
Inventor 徐靖才王攀峰王新庆洪波
Owner CHINA JILIANG UNIV
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