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Preparation method of nano Ni3S2 material with lamellar structure

A lamellar structure and nanotechnology, applied in the field of nano-Ni3S2 materials and their preparation, can solve the problems of unfavorable large-scale production, toxic raw materials, and complicated process, and achieve excellent electrochemical performance, low cost, and simple process.

Inactive Publication Date: 2014-12-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems that the existing preparation method has complex technological process, most of the raw materials are poisonous and expensive, the yield is low, the energy consumption is large, the cost is high, and it is not conducive to large-scale production.

Method used

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  • Preparation method of nano Ni3S2 material with lamellar structure
  • Preparation method of nano Ni3S2 material with lamellar structure
  • Preparation method of nano Ni3S2 material with lamellar structure

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Weigh 0.19 g NiCl 2 ·6H 2 O, 0.10 g of urea was dissolved in 70 ml of deionized water, stirred evenly to form a light green clear solution. The mixed solution was continuously stirred for 1 h, and then the obtained clear solution was poured into a 100 ml hydrothermal kettle with a polytetrafluoroethylene liner, and a piece of Ni mesh was placed in the polytetrafluoroethylene liner. o C for 18 h. The precursor obtained by the reaction was washed with deionized water and ethanol, respectively, and vacuum-conditioned at 50 o C to dry for 2 h. Weigh 0.14 g Na 2 S·9H 2 O was dissolved in 70 ml of deionized water, stirred evenly to form a clear solution, and then the obtained clear solution was poured into a 100 ml hydrothermal kettle with a polytetrafluoroethylene liner, and the precursor obtained above was put into it. o C for 7 h. The product obtained by the reaction was washed with deionized water and ethanol respectively, and was vacuum-conditioned at 50 o After...

Embodiment 2

[0032] Weigh 0.48 g Ni(NO 3 ) 2 ·6H 2 O, 0.19 g of ammonia water was dissolved in 70 ml of absolute ethanol, and stirred evenly to form a light green clear solution. The mixed solution was continuously stirred for 1 h, and then the obtained clear solution was poured into a 100 ml hydrothermal kettle with a polytetrafluoroethylene liner, and a piece of Ni mesh was placed in the polytetrafluoroethylene liner, at 180 o C for 10 h. The precursor obtained by the reaction was washed with deionized water and ethanol, respectively, and vacuum-conditioned at 50 o C to dry for 2 h. Weigh 0.2 g SnS 2 Dissolve in 70 ml of absolute ethanol, stir evenly to form a clear solution, then pour the resulting clear solution into a 100 ml hydrothermal kettle with a polytetrafluoroethylene liner, and put the precursor obtained above, at 180 o C for 18 h. The product obtained by the reaction was washed with deionized water and ethanol respectively, and was vacuum-conditioned at 50 o After d...

Embodiment 3

[0035] Weigh 0.6 g Ni(CH 3 COO) 2 4H 2 O, 0.9 g of urea was dissolved in 70 ml of ethanol and alcohol mixture (1:1, V / V), and stirred evenly to form a light green clear solution. The mixed solution was continuously stirred for 1 h, and then the obtained clear solution was poured into a 100 ml hydrothermal kettle with a polytetrafluoroethylene liner, and a piece of Ni mesh was placed in the polytetrafluoroethylene liner. o C for 12 h. The precursor obtained by the reaction was washed with deionized water and ethanol, respectively, and vacuum-conditioned at 50 o C to dry for 2 h. Weigh 0.7 g CoS and dissolve it in 70 ml ethanol and alcohol mixture (1:1, V / V), stir well to form a clear solution, then pour the obtained clear solution into a 100 ml Teflon-lined In the water heating still, and put into the above-mentioned obtained precursor, at 160 o C for 7 h. The product obtained by the reaction was washed with deionized water and ethanol respectively, and was vacuum-condit...

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Abstract

The invention discloses a preparation method of a nano Ni3S2 material and belongs to the field of novel energy resources and electrochemistry. The preparation method of the nano Ni3S2 material is characterized by synthesizing the nano Ni3S2 material by taking a Ni net with a three-dimensional porous structure by virtue of a solvothermal method. A nano Ni3S2 active substance formed during the solvothermal process is directly loaded on an upper matrix of the Ni net, so that the active substance Ni3S2 is in relatively firm contact with a Ni net of a current collector; gaps of the porous Ni net can effectively buffer the volume change of the Ni3S2 in the processes of removing and embedding lithium, so that the cycle stability of the composite material can be improved; meanwhile, by virtue of a three-dimensional conductive network of the Ni net, the electronic conductivity of the composite material can be improved, so that the rate performance of the material is improved. The preparation method of the nano Ni3S2 material is simple, green, free from pollution, low in cost and suitable for industrial production. The Ni3S2 material prepared by adopting the method is small in particle size and uniform in particle distribution; according to an electrode prepared from the material, a polymer adhesive and a conductive agent do not need to be added in the electrode; the electrode has the high electrochemical performance and can be widely used in the fields of various portable electronic devices, electric automobiles, aeronautics and astronautics, and the like.

Description

technical field [0001] The invention belongs to the field of new energy materials and electrochemistry, in particular to a nano-Ni with a lamellar structure 3 S 2 Materials and their preparation methods. technical background [0002] Lithium-ion battery is the secondary battery with the best overall performance. It has the characteristics of high working voltage, high energy density, long cycle life, no memory effect, and environmental friendliness. It is a green high-energy battery and has been widely used in mobile phones. , notebook computers and other portable electronic devices, and gradually expand to the fields of power tools, electric vehicle power batteries and large energy storage batteries. The electrochemical performance of lithium-ion batteries is closely related to the structure and performance of electrode materials. The choice of electrode material largely determines the performance of the battery. Commonly used electrode materials, such as graphite, have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58
CPCB82Y30/00H01M4/0492H01M4/5815H01M10/0525H01M2004/021Y02E60/10
Inventor 赵海雷张子佳曾志鹏高春辉夏青
Owner UNIV OF SCI & TECH BEIJING
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