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A kind of nano-nickel disulfide material and its preparation method and application

A nickel disulfide and nanotechnology, which is applied to nanometer nickel disulfide materials and their preparation and application fields, can solve the problems of unsuitability for large-scale production, low discharge voltage, low decomposition temperature, etc. Capacity and specific energy, low cost effect

Active Publication Date: 2019-11-15
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Traditional thermal battery cathode material FeS 2 With low decomposition temperature and high resistance, it is only suitable for short-life thermal battery cathode material; another cathode material CoS 2 Due to high cost and low discharge voltage, it is not suitable for mass production

Method used

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  • A kind of nano-nickel disulfide material and its preparation method and application
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  • A kind of nano-nickel disulfide material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Import nickel powder and sublimated sulfur powder into the agate tank at a mass ratio of 1:1.2, add agate balls at a ratio of 10:1 to the ball to material ratio, ball mill at a speed of 450r / min for 10 hours, and then put the ball abrasives into vacuum drying Dry in an oven for 5 hours, and finally seal and press in a graphite mold. Under an Ar protective atmosphere, raise the temperature to 400°C at a heating rate of 5°C / min, keep it warm for 2h, cool down to room temperature naturally, take out the sintered sample and grind it for storage. The XRD analysis of the calcined powder shows that the pure phase NiS can be obtained after ball milling and calcining at low temperature 2 , the Scherrer formula calculates that the grain size is about 52nm ( figure 1 ). Laser particle size analyzer test powder particle size average size is 124nm ( figure 2 ). Nano-NiS 2 Matched with LiB negative electrode and ternary electrolyte (LiF-LiCl-LiBr) to prepare a monothermal batter...

Embodiment 2

[0034] Import nickel powder and sublimated sulfur powder into the agate tank at a mass ratio of 1:1.7, add agate balls at a ball-to-material ratio of 10:1, ball mill at a speed of 400r / min for 30 hours, and then put the ball abrasives into vacuum drying Dry in an oven for 3 hours, and finally seal and press in a graphite mold. Under an Ar protective atmosphere, raise the temperature to 500°C at a heating rate of 5°C / min, keep it warm for 0.5h, cool down to room temperature naturally, take out the sintered sample and grind it for storage. The XRD analysis of the calcined powder shows that the ball milling low temperature calcination can obtain the pure phase NiS 2 , the grain size analyzed by transmission electron microscopy is about 80nm ( image 3 ). Nano-NiS 2 Matched with LiB negative electrode and ternary electrolyte (LiF-LiCl-LiBr) to prepare a monothermal battery system and at 0.1A cm -2 --Discharge at 500°C ( Figure 4 ), the test results show that nano-NiS 2 The s...

Embodiment 3

[0036] Import nickel powder and sublimated sulfur powder into the agate tank at a mass ratio of 1:2, add agate balls at a ratio of 10:1 to the ball to material ratio, ball mill at a speed of 350r / min for 40 hours, and then put the ball abrasives into vacuum drying Dry it in the oven for 4 hours, and finally seal and press it in a graphite mold. Under an Ar protective atmosphere, raise the temperature to 350°C at a heating rate of 5°C / min, keep it warm for 4 hours, and cool it down to room temperature naturally. Take out the sintered sample and grind it for storage. The XRD analysis of the calcined powder shows that the ball milling low temperature calcination can obtain the pure phase NiS 2 , the laser particle size analyzer test shows that the particle size is about D90≤470nm, and the specific surface test shows that nano-sized NiS 2 The specific surface area is much higher than the micron level, reaching 33.06m 2 g -1 . Nano-NiS 2 Matched with LiB negative electrode and ...

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Abstract

The invention provides a nanometer nickel disulfide material and a preparation method and an application thereof. The preparation method comprises the following steps of (1) performing mechanical ballmilling and mixing on nickel powder and sublimed sulfur powder in a ball mill, wherein the mass ratio of nickel powder to sublimed sulfur powder is 1:1.2-1:2, and performing drying on the ball milledmaterial; and (2) performing calcining on the dried ball milled material under inert gas protection, wherein the calcining temperature is 350-500 DEG C and the calcining time is 0.5-4h; and performing cooling after calcining to obtain the nanometer nickel disulfide material. The preparation method is low in cost and the obtained electrode material is excellent in performance.

Description

technical field [0001] The invention relates to a nano-nickel disulfide material and a preparation method and application thereof. Background technique [0002] Transition metal sulfides, due to their excellent optical, electrical, magnetic and catalytic properties, are widely used in supercapacitors, lithium-ion batteries, solar cells, thermal batteries and photocatalysis. Recently, due to the advantages of nanotechnology in many fields, nanoscale NiS 2 Its application has attracted the attention of many researchers. For example, Ye M X et al. have reported a graphene-coated nano-NiS by hydrothermal synthesis 2 , has a specific capacity of 478.1F / g when used as a supercapacitor electrode, and its voltage only decreases by 10.7% after 2000 cycles, but this method prepares NiS 2 Need a variety of raw materials, and the output is low, it is difficult to produce industrially (Li X, Shen J, Li N, et al.Template-free solvothermal synthesis of NiS 2 Microspheres on graphene sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M6/36C01G53/11B82Y30/00
CPCB82Y30/00C01G53/11C01P2002/01C01P2002/60C01P2002/72C01P2004/62C01P2006/12C01P2006/40H01M4/5815H01M6/36
Inventor 周灵平金传玉符立才杨武霖朱家俊李德意
Owner HUNAN UNIV
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