NiTe2/MXene composite material and preparation method and application thereof

A composite material and mixed solution technology, applied in the field of nanomaterials, can solve the problems of poor electrochemical performance, electrode material crushing, falling off, etc., and achieve the effects of improving electrical conductivity, low cost, and increasing active sites.

Inactive Publication Date: 2020-12-01
WUYI UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the pure NiTe 2 Huge volume expansion occurs during cycling, leading to crushing and shedding of electrode materials, resulting in poor electrochemical performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • NiTe2/MXene composite material and preparation method and application thereof
  • NiTe2/MXene composite material and preparation method and application thereof
  • NiTe2/MXene composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] The invention provides a NiTe 2 The preparation method of / MXene composite material, wherein, NiTe 2 For the synthesis method, please refer to:

[0040] "Lei Yuxi. Hydrothermal Synthesis, Modification and Properties of Various Transition Metal Telluride Nanostructures [D]. Shaanxi Normal University, 2018.".

Embodiment 1

[0042] A kind of NiTe 2 The preparation method of / MXene composite material, comprises the following steps:

[0043] (1) Take 0.1mmol MXene (Ti 3 C 2 T x ) into ethanol, magnetically stirred for 1 hour, and configured into a 1 mg / ml dispersion;

[0044] (2) 0.1mmol NiCl 2 ·6H 2 O and 0.2mmol sodium tellurite were added to the dispersion described in step (1), and stirred for 5 hours to obtain a mixed solution;

[0045] (3) Transfer the mixed solution into a reaction kettle with a capacity of 100ml, seal it, place it in an oven, heat it to 100°C, keep it warm for 10h, and then cool it to room temperature;

[0046] (4) The product obtained in step (3) was centrifuged for 4 minutes under the condition of 4000r / min with a centrifuge, the supernatant was discarded, and the filter residue was washed alternately with deionized water and absolute ethanol for 3 times, and then carried out in a vacuum oven. Drying, drying temperature 60 ° C, drying time 9 hours, collected to obtai...

Embodiment 2

[0050] A kind of NiTe 2 The preparation method of / MXene composite material, comprises the following steps:

[0051] (1) Take 0.2mmol MXene (Ti 3 C 2 T x ) into ethanol, magnetically stirred for 3 hours, and configured into a 50 mg / ml dispersion;

[0052] (2) 0.2mmol NiCl 2 ·6H 2 O and 0.25mmol sodium tellurite were added to the dispersion described in step (1), and stirred for 10 hours to obtain a mixed solution;

[0053] (3) Transfer the mixed solution into a 50ml reaction kettle, seal it, place it in an oven, heat it to 150°C, keep it warm for 16h, and then cool it down to room temperature;

[0054] (4) The product obtained in step (3) was centrifuged for 7 minutes under the condition of 6000r / min with a centrifuge, the supernatant was discarded, and the filter residue was washed alternately with deionized water and absolute ethanol for 3 times, and then carried out in a vacuum oven. Drying, drying temperature 60 ° C, drying time 12 hours, collected to obtain NiTe 2 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a NiTe2 / MXene composite material and a preparation method and application thereof. The preparation method comprises the following steps of(1) adding MXene into a dispersing agent to prepare a dispersion liquid with the concentration of 1-100mg / ml,(2) adding a nickel source material and a tellurium source material into the dispersion liquid according to a molar ratio of 1: (1-4) to obtain a mixed liquid, and (3) heating the mixed liquid to 100-220 DEG C, keeping the temperature for 10-24 hours, cooling, centrifuging, washing and drying to obtain the NiTe2 / MXene compositematerial. Compared with a pure NiTe2 material, according to the NiTe2 / MXene composite material prepared by the invention, MXene is used as a 3D substrate,NiTe2 is loaded on MXene, and the prepared NiTe2 / MXene composite material shows relatively high reversible specific capacity, good cycling stability and excellent electrochemical performance when being applied to a negative electrode of a potassium ion battery.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a NiTe 2 / MXene composites and their preparation methods and applications. Background technique [0002] In recent years, with the widespread use of electronic products and new energy vehicles, lithium-ion batteries have occupied a dominant position in the field of energy storage. Questions cause concern. In this regard, it has become a research hotspot to seek a new type of secondary alkali metal battery with abundant resources and low cost. [0003] Potassium has the advantages of abundant resources, low price, and wide sources. In electrochemical systems, potassium has low electrode potential and high ion conductivity. Therefore, potassium ion batteries are considered to be ideal energy storage systems in the future. However, due to the radius of the potassium ion much larger than Li-ion The electrode material will undergo huge volume expansion during the potassiu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/36H01M4/58H01M4/136H01M10/054B82Y40/00
CPCB82Y40/00H01M4/136H01M4/362H01M4/58H01M4/581H01M10/054Y02E60/10
Inventor 张业龙徐晓丹周健文孙宏阳刘争
Owner WUYI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap