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Porous layered carbon nitride/graphene/nickel disulfide super capacitor material and preparation method thereof

A supercapacitor and nickel disulfide technology, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of structural stability, poor cycle life, and poor electron mobility, and achieve good uniformity, high specific surface area utilization, and high ratio energy effect

Active Publication Date: 2020-02-21
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electron mobility of nickel sulfide is poor, and it is difficult to support work at a high current density. At the same time, the structural stability and cycle life are poor during the cycle.

Method used

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  • Porous layered carbon nitride/graphene/nickel disulfide super capacitor material and preparation method thereof
  • Porous layered carbon nitride/graphene/nickel disulfide super capacitor material and preparation method thereof
  • Porous layered carbon nitride/graphene/nickel disulfide super capacitor material and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0034] Disperse 0.5mmol of cellulose powder in N,N-dimethylacetamide solvent, add 5mmol of succinic anhydride, stir and react at 80°C for a period of time, then add 40mL of 2mg / mL graphene N,N-di The methylformamide dispersion is stirred at room temperature for a period of time, filtered, washed and then dispersed in water to obtain a modified cellulose-modified graphene aqueous solution. Dissolve 1 g of melamine in an acidic aqueous solution with a pH of 1, stir for 30 minutes, add 20 mg of modified cellulose-modified graphene dispersed in water, stir evenly, dry, and then calcinate at 550°C for 4 hours to obtain g-C 3 N 4 / graphene composites. Take 30mg of g-C 3 N 4 / Graphene was first ultrasonicated in N,N-dimethylformamide solution at a power of 250W for 2h, then filtered, washed, and then dispersed in 15mL aqueous solution, followed by adding 15mL of 0.6mmol nickel nitrate and 3mmol thiourea in ethyl alcohol The diol solution was added dropwise to the above solution,...

Embodiment 2

[0042] Disperse 0.5mmol cellulose powder in N,N-dimethylacetamide solvent, add 4mmol citric acid, stir and react at 80°C for a period of time, then add 80mL 0.5mg / mL graphene N,N-di The methylformamide dispersion is stirred at room temperature for a period of time, filtered, washed and then dispersed in water to obtain a modified cellulose-modified graphene aqueous solution. Dissolve 0.2g of melamine in an acidic solution with a pH of 2, stir for 30 minutes, add 20mg of modified cellulose-modified graphene dispersed in water, stir evenly, dry, and then calcinate at 500°C for 6h to obtain g-C 3 N 4 / graphene composites. 15mg g-C 3 N 4 / Graphene was first ultrasonicated in N,N-dimethylformamide solution at 250W power for 4h, then filtered, washed, and then dispersed in 30mL water, followed by ethylene glycol solution with 0.6mmol nickel nitrate and 3mmol thiourea Mix well, and transfer the formed mixture to a 50mL polytetrafluoroethylene reactor, and react at 170°C for 12...

Embodiment 3

[0044] Disperse 0.5mmol of cellulose powder in N,N-dimethylacetamide solvent, add 1mmol of thioglycolic acid, stir and react at 80°C for a period of time, then add 12mL of 2mg / mL graphene N,N-di The methylformamide dispersion is stirred at room temperature for a period of time, filtered, washed and then dispersed in water to obtain a modified cellulose-modified graphene aqueous solution. Dissolve 2 g of melamine in an acidic solution with a pH of 3, stir for 30 minutes, add 20 mg of modified cellulose-modified graphene dispersed in water, stir evenly, dry, and then calcinate at 580°C for 3 hours to obtain g-C 3 N 4 / graphene composites. Take 40mg g-C 3 N 4 / Graphene is first ultrasonicated for 0.5h under the power of N,N-dimethylformamide 250W, then filtered, washed, then dispersed in 8mL water, and then mixed with ethylene glycol solution of 0.6mmol nickel nitrate and 3mmol thiourea , Transfer the resulting mixed solution to a 50mL polytetrafluoroethylene reactor, and r...

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Abstract

The invention discloses a porous layered carbon nitride / graphene / nickel disulfide super capacitor material and a preparation method thereof. Porous layered g-C3N4 / graphene is compounded with a NiS2 pseudo-capacitive material to form the carbon nitride / graphene / nickel disulfide material with a heterostructure. The electrode material has the characteristics of high specific capacity and good stability.

Description

technical field [0001] The invention belongs to the technical field of asymmetric supercapacitor electrode materials, and in particular relates to a carbon nitride / graphene / nickel disulfide supercapacitor material with a porous layered structure and a preparation method thereof. Background technique [0002] In recent years, as an efficient and clean energy storage device, supercapacitors have attracted extensive attention in scientific research and industry due to the advantages of high discharge power of traditional capacitors and high energy density of batteries. The capacitance performance of supercapacitors is mainly determined by the electrode materials, so the development of electrode materials with excellent performance is the key to improving the storage performance of supercapacitors. Due to their high specific surface area and special lamellar structure, two-dimensional materials are conducive to the full progress of surface-interface electrochemical reactions. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36
CPCH01G11/24H01G11/30H01G11/36Y02E60/13
Inventor 魏巍巫云萍
Owner XI AN JIAOTONG UNIV
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