Check patentability & draft patents in minutes with Patsnap Eureka AI!

Bismuth telluride-based composite negative electrode material of sodium/potassium ion battery and preparation method of bismuth telluride-based composite negative electrode material

A negative electrode material, potassium ion technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of high specific capacity, loss of activity, poor rate performance and other problems of alloying mechanism materials, and achieve excellent structural stability and electrochemical kinetics The effects of academic behavior, long cycle life, and high discharge specific capacity

Pending Publication Date: 2022-04-29
NORTHWESTERN POLYTECHNICAL UNIV
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The slow diffusion kinetics of insertion-type anode materials in the diffusion process results in poor rate performance, which limits the specific capacity; in contrast, conversion reaction materials can obtain higher specific capacity, but higher operating voltage; alloy The higher specific capacity and lower working voltage of the chemical mechanism materials
However, the conversion / alloying mechanism materials will have a huge volume change during the cycle, which will cause the electrode to crack and gradually lose activity during the cycle.

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
  • Bismuth telluride-based composite negative electrode material of sodium/potassium ion battery and preparation method of bismuth telluride-based composite negative electrode material
  • Bismuth telluride-based composite negative electrode material of sodium/potassium ion battery and preparation method of bismuth telluride-based composite negative electrode material
  • Bismuth telluride-based composite negative electrode material of sodium/potassium ion battery and preparation method of bismuth telluride-based composite negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Weigh sodium tellurite and bismuth trichloride at a molar ratio of 3:2, disperse them in 50 mL of ethylene glycol, stir at 30°C for 2 hours to form a uniform solution, then add sodium hydroxide and PVP, and continue stirring Dissolve completely, then add graphene with the mass ratio of bismuth antimonide and graphene as 5.0, fully stir;

[0037] (2) Transfer the solution obtained in step (1) to a 100mL polytetrafluoroethylene liner, seal it in a reaction kettle, and react at 180°C for 36h;

[0038](3) Precipitate the product obtained in step (2) through a high-speed centrifuge, and wash it with deionized water for more than 3 times, and finally freeze the resulting powder, and dry it at -40°C under vacuum conditions (vacuum degree 20MPa) 12h get Bi 2 Te 3 @rGO anode material.

[0039] (4) Dissolve Tris in 100mL of deionized water, add concentrated hydrochloric acid with a pipette, and form a uniform solution with a pH of 8.0 by stirring; dopamine hydrochloride an...

Embodiment 2

[0048] (1) Weigh sodium tellurite and bismuth sulfate at a molar ratio of 2.9:2.1, disperse them in 50 mL of ethylene glycol, stir at 40°C for 1 hour to form a uniform solution, then add sodium hydroxide and PVP, and continue stirring until complete Dissolve, then add graphene with the mass ratio of bismuth antimonide and graphene as 3.0, fully stir;

[0049] (2) Transfer the solution obtained in step (1) to a 100mL polytetrafluoroethylene liner, seal it in a reaction kettle, and react at 180°C for 36h;

[0050] (3) Precipitate the product obtained in step (2) through a high-speed centrifuge, and wash it with deionized water for more than 3 times, and finally freeze the resulting powder, and dry it at -40°C under vacuum conditions (vacuum degree 20MPa) 12h get Bi 2 Te 3 @rGO anode material.

[0051] (4) Dissolve Tris in 100mL of deionized water, add concentrated hydrochloric acid with a pipette, and form a uniform solution with a pH of 8.0 by stirring; dopamine hydrochlorid...

Embodiment 3

[0053] (1) Weigh sodium tellurite and bismuth sulfate at a molar ratio of 2.9:2.1, disperse them in 50 mL of ethylene glycol, stir at 40°C for 1 hour to form a uniform solution, then add sodium hydroxide and PVP, and continue stirring until complete Dissolve, then add graphene with the mass ratio of bismuth antimonide and graphene as 3.0, fully stir;

[0054] (2) Transfer the solution obtained in step (1) to a 100mL polytetrafluoroethylene liner, seal it in a reaction kettle, and react at 200°C for 20h;

[0055] (3) Precipitate the product obtained in step (2) through a high-speed centrifuge, and wash it with deionized water for more than 3 times, and finally freeze the resulting powder, and dry it at -50°C under vacuum conditions (vacuum degree 20MPa) 24h to get Bi 2 Te 3 @rGO anode material.

[0056] (4) Dissolve Tris in 100mL of deionized water, add concentrated hydrochloric acid with a pipette, and form a uniform solution with a pH of 8.0 by stirring; dopamine hydrochlo...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a bismuth telluride-based composite negative electrode material of a sodium / potassium ion battery, which comprises the following steps of: dissolving sodium tellurite and bismuth salt in ethylene glycol according to a certain proportion, adding sodium hydroxide and polyvinylpyrrolidone to prepare a uniform solution, then carrying out hydrothermal reaction at a certain temperature, filtering, washing and drying to obtain the bismuth telluride-based composite negative electrode material of the sodium / potassium ion battery. Cleaning for multiple times and drying to obtain an original material; and then coating the material with graphene and a carbon nano layer in sequence under a certain condition to obtain the composite negative electrode material. The material prepared by the invention is composed of nanosheets uniformly coated with graphene and a carbon layer, so that the composite material shows high specific capacity, excellent cycling stability and outstanding rate capability when being used as a sodium / potassium ion battery negative electrode material; in addition, the preparation process is simple, easy to operate and suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of sodium and potassium ion batteries, and in particular relates to a bismuth telluride-based composite negative electrode material and a preparation method thereof. Background technique [0002] At present, my country has become the world's largest energy producer and consumer. The main energy supply is still coal, oil, and natural gas, but this has led to a series of outstanding problems, mainly reflected in the challenges of energy supply security, ecological The increasing pressure on the environment, the prominent problem of pollution emissions, the overall low level of energy science and technology, and the fierce international competition, coupled with the goal of "carbon peaking and carbon neutrality" put forward by my country, the problems facing the energy field are more prominent and severe. . Limited by the characteristics of my country's energy resources, it is difficult for petrochemical and coa...

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): H01M4/58H01M4/62
CPCH01M4/58H01M4/625
Inventor 崇少坤袁令令李婷周倩雯王艺焜
Owner NORTHWESTERN POLYTECHNICAL UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com