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An ultrathin single crystal nicl 2 Nanosheet and its preparation method and application

A nanosheet and single crystal technology, which is applied in the field of ultra-thin single crystal material preparation, can solve the problems that nanosheets have not been reported yet, and achieve the effects of suitable batch preparation, simple preparation process and low cost

Active Publication Date: 2020-04-17
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But ultrathin single crystal NiCl 2 Nanosheets have not yet been reported

Method used

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  • An ultrathin single crystal nicl <sub>2</sub> Nanosheet and its preparation method and application
  • An ultrathin single crystal nicl <sub>2</sub> Nanosheet and its preparation method and application
  • An ultrathin single crystal nicl <sub>2</sub> Nanosheet and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1 Nickel chloride hexahydrate crystal (NiCl 2 ·6H 2 O) Put it in an alumina crucible, put it into a tube furnace, and under the protection of an inert gas, raise the temperature to 270°C at a heating rate of 5°C / min, keep it warm for 2h, cool down to room temperature naturally, and take out the sintered sample; replace Clean quartz tube A,

[0046] 2. Spread the fine powder in an open ceramic crucible, and place it in the center of the clean and dry quartz tube A (the position of the effective high temperature zone of the tube furnace);

[0047] 3. Embed the quartz tube collector embedded with two perforated quartz plates (aperture 2-10 mm) in the low temperature area of ​​the tube furnace quartz tube near the gas outlet; the flow direction of the perforated quartz plate and the protective gas is 90°.

[0048] 4. Vacuum, and then pass in Ar or N 2 Wait for protective gas; keep the gas flow at 50 sccm during the period from room temperature to 600 °C and during coolin...

Embodiment 2

[0053] 1 Nickel chloride hexahydrate crystal (NiCl 2 ·6H 2 O) Put it in an alumina crucible, put it into a tube furnace, and under the protection of an inert gas, raise the temperature to 250°C at a heating rate of 5°C / min, keep it warm for 3h, cool down to room temperature naturally, and take out the sintered sample; replace Clean quartz tube A;

[0054] 2. Spread the fine powder in an open ceramic crucible, and place it in the center of the clean and dry quartz tube A (the position of the effective high temperature zone of the tube furnace);

[0055] 3. Embed the quartz tube collector embedded with two perforated quartz plates (aperture 2-10 mm) in the low temperature area of ​​the tube furnace quartz tube near the gas outlet; the flow direction of the perforated quartz plate and the protective gas is 90°.

[0056] 4. Vacuum, and then pass in Ar or N 2 Wait for protective gas; keep the gas flow at 50 sccm during the period from room temperature to 600 °C and during coolin...

Embodiment 3

[0062] Nickel chloride hexahydrate crystals (NiCl 2 ·6H 2 O) Put it in an alumina crucible, put it into a tube furnace, and under the protection of an inert gas, raise the temperature to 250°C at a heating rate of 5°C / min, keep it warm for 3h, cool down to room temperature naturally, take out the sintered sample, and grind save.

[0063] The resulting product powder shows through FE-SEM analysis that the prepared anhydrous NiCl 2 , showing a rod shape, the end face is a square with a size of submicron, and the length is more than 3 microns; the obtained anhydrous NiCl 2 The powder is matched with LiB negative electrode and ternary electrolyte (LiF-LiCl-LiBr) to prepare a monothermal battery system and at 0.75A cm -2 --Discharge at 580°C, the maximum working voltage is only 2.17V, and there is no discharge platform, the test results show that anhydrous NiCl 2 The specific power of the powder is ~24kW kg -1 .

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Abstract

The invention relates to an ultrathin monocrystalline NiCl2 nanosheet and a preparation method and application thereof. The nanosheet has the thickness of 2-20 nm and has the preferred orientation of(003) crystal face. The preparation method comprises the following steps: firstly placing nickel chloride hexahydrate into a tubular furnace, and dehydrating under the protection of inert gas; and then placing the pretreated powder into a clean and dry tubular furnace, and sublimating under the protection of inert gas to obtain the ultrathin monocrystalline NiCl2 nanosheet. The designed and prepared product is applied to at least one of the following materials: a cathode material of a thermal battery, a supercapacitor, a lithium ion battery, a sodium-ion battery and a magnetic material.

Description

technical field [0001] The invention relates to an ultrathin single crystal NiCl 2 The nanosheet and its preparation method and application belong to the technical field of preparation of ultra-thin single crystal materials. Background technique [0002] Ultra-thin two-dimensional nanosheets are flake-like structures with a size of only a few atomic layers in the thickness direction and a larger planar size of even several microns. Because of its thickness at the atomic level, it often has a unique structure and performance. Among them, the advantages of high conductive carrier mobility, large specific surface area and polyatomic exposure make it excellent in physical, chemical, electronic and optical properties. It is prominent and widely used in the fields of electronics / photoelectronics, photo / electrocatalysis, lithium batteries, solar cells and sensors (Tan et al.Recent Advances in Ultrathin Two-Dimensional Nanomaterials.Chem Rev 117, 6225-6331(2017). ). For example, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/12C30B29/64C30B25/02
CPCC30B25/02C30B29/12C30B29/64
Inventor 符立才林晓霞周灵平朱家俊杨武霖李德意
Owner HUNAN UNIV
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