preparation method of NiSe2/Ti3C2Tx high-performance supercapacitor nanocomposite

A technology of nanocomposite materials and supercapacitors, which is applied in the field of preparation of supercapacitor electrode materials, can solve the problems of limited energy density and durability, poor conductivity, etc., and achieve the effects of short process time, high energy density and excellent cycle stability

Active Publication Date: 2019-01-25
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to solve NiSe 2 Nanoparticles as electrode materials for supercapacitors suffer from poor electrical conductivity, limited energy density, and limited durability

Method used

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  • preparation method of NiSe2/Ti3C2Tx high-performance supercapacitor nanocomposite
  • preparation method of NiSe2/Ti3C2Tx high-performance supercapacitor nanocomposite
  • preparation method of NiSe2/Ti3C2Tx high-performance supercapacitor nanocomposite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1)Ti 3 C 2 T x Preparation of nanosheets:

[0030] 1.1) Add 2g LiF to 20ml HCl and stir until clear.

[0031] 1.2) Add 2g of Ti 3 AlC 2 The powder was added to the solution in step 1.1), the solution was heated at 40° C., and kept at a constant temperature for 48 hours. The reacted solution was washed with deionized water several times and centrifuged until the pH of the supernatant was about 6.

[0032] 1.3) The centrifuged solid in step 1.2) was vacuum-dried at 60°C for 12 hours to obtain Ti 3 C 2 Tx powder.

[0033] 1.4) Weigh the Ti obtained in step 1.3) 3 C 2 Add 100mg of Tx powder to 10ml of water, and ultrasonicate the solution to obtain 10mg·mL -1 Ti 3 C2 T x flake solution.

[0034] 2) NiSe 2 / Ti 3 C 2 T x Preparation of nanocomposites:

[0035] 2.1) 2mmol Se powder was dissolved in 5ml KOH solution to form a maroon solution.

[0036] 2.2) 1 mmol NiCl 2 Dissolve in 19 mL of deionized water, and then add 1.6 mmol of chelating agent such as L ...

Embodiment 2

[0042] Remove step 2) NiSe 2 / Ti 3 C 2 T x The preparation of nanocomposite material, other conditions are with embodiment 1, obtain NiSe 2 , made into a supercapacitor for electrochemical performance measurement.

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Abstract

The invention relates to a preparation method of NiSe2/Ti3C2Tx high-performance supercapacitor nano composite material, belonging to the technical field of energy storage materials. A supercapacitor electrode material with good electrochemical performance is prepare by combining NiSe2 and Ti3C2Tx. In particular to an etching solution of LiF and HCl, the Al layer of Ti3AlC2 is corroded, At that same time, Ti3C2Tx thin sheet is deposite on the NiSe2 particles, and finally, the electrode material of the supercapacitor is obtain by washing and drying. The Ti3C2Tx powder is mix with NiCl2 accordingto a certain molar ratio, and the reaction is carried out under the action of a chelating agent to generate NiSe2 nano particles. The invention utilizes NiSe2 material with high theoretical specificcapacitance, and aiming at its disadvantage of poor conductivity, hydrothermal method, Ti3C2Tx nanosheets with good electrical conductivity were compounded with NiSe2 particles, NiSe2/Ti3C2Tx nanocomposites were obtained, which not only possessed better charge transfer and more active sites, but also improved the durability of NiSe2/Ti3C2Tx nanocomposites, thus improving the performance of supercapacitors.

Description

technical field [0001] The present invention relates to a kind of NiSe 2 / Ti 3 C 2 T x The invention relates to a preparation method of a high-performance supercapacitor nanocomposite material, which belongs to the technical field of energy storage materials, and specifically relates to a preparation method of a supercapacitor electrode material. The technical feature of this method is that NiSe with high theoretical specific capacitance 2 Material and good electrical conductivity Ti 3 C 2 T x Materials are compounded to prepare supercapacitor electrode materials with excellent performance. Background technique [0002] The growing demand for sustainable clean energy and renewable energy has greatly promoted the development of energy storage and conversion technologies. Among various energy storage devices, supercapacitors (SCs) have the advantages of high energy density, long cycle life, and fast charge-discharge rate, which can provide higher energy than ordinary c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/24B82Y30/00B82Y40/00
CPCH01G11/24H01G11/30B82Y30/00B82Y40/00Y02E60/13
Inventor 张莉梅董立春江寒梅谭陆西秦莉晓
Owner CHONGQING UNIV
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