Preparation method and application of an in-situ carbon-coated binary transition metal oxide heterojunction bowl-shaped nanocomposite

A nanocomposite material and transition metal technology, applied in nanotechnology, nanotechnology, active material electrodes, etc., can solve problems such as poor rate performance and short battery cycle life, and achieve reduced band gap, high repeatability, and simple operation. Effect

Active Publication Date: 2021-12-24
HENAN NORMAL UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to fully understand and make good use of its advantages and disadvantages (the ionic radius is large, when it is embedded in the material, the volume of the material will expand significantly, resulting in a short cycle life of the battery and poor rate performance), it still needs to do in-depth research. Therefore, The development of electrode materials with large capacity, good rate and cycle performance is of great significance to the research and further development of potassium ion batteries. In view of this, many methods have been studied to solve the problem of transition metal oxides as negative electrode materials.

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
  • Preparation method and application of an in-situ carbon-coated binary transition metal oxide heterojunction bowl-shaped nanocomposite
  • Preparation method and application of an in-situ carbon-coated binary transition metal oxide heterojunction bowl-shaped nanocomposite
  • Preparation method and application of an in-situ carbon-coated binary transition metal oxide heterojunction bowl-shaped nanocomposite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of MnO-Mn 3 o 4 @C-N nanocomposite material

[0031] Disperse 5.6g of polyvinylpyrrolidone in a mixed solution of 100mL of absolute ethanol and primary deionized water (volume ratio 2:1) and stir and mix evenly at 300rpm, then add 1.1g of manganese acetate tetrahydrate at the same speed And stir and mix uniformly to obtain a clear and transparent solution X; dissolve 2.0g of trimesic acid in a mixed solution of 100mL of absolute ethanol and primary deionized water (volume ratio 2:1) and stir and mix uniformly to obtain a solution Y, then at 300rpm Use BT100-2J peristaltic pump under the condition -1 The flow rate was added to the clear and transparent solution X obtained in step S1, and it was left to stand for several hours, and then the resulting precipitate was collected by centrifugation, and the resulting precipitate was washed with absolute ethanol several times to remove surfactants and residual ions, and then the resulting product was Dry in a vac...

Embodiment 2

[0033] Preparation of MnO-Mn 3 o 4 @C-N nanocomposite material

[0034] Disperse 6.1g of polyvinylpyrrolidone in a mixed solution of 120mL of absolute ethanol and primary deionized water (volume ratio 2:1) and stir and mix evenly at 350rpm, then add 1.6g of manganese acetate tetrahydrate at the same speed And stir and mix uniformly to obtain a clear and transparent solution X; dissolve 2.8g of trimesic acid in a mixed solution of 100mL absolute ethanol and primary deionized water (volume ratio 2:1) and stir and mix uniformly to obtain a solution Y, then at 350rpm Use BT100-2J peristaltic pump under the condition -1 The flow rate was added to the clear and transparent solution X obtained in step S1, and it was left to stand for several hours, and then the resulting precipitate was collected by centrifugation, and the resulting precipitate was washed with absolute ethanol several times to remove surfactants and residual ions, and then the resulting product was Dry in a vacuum...

Embodiment 3

[0036] Preparation of MnO-Mn 3 o 4 @C-N nanocomposite material

[0037] Disperse 6.8g of polyvinylpyrrolidone in a mixed solution of 180mL of absolute ethanol and primary deionized water (volume ratio 2:1) and stir and mix evenly at 410rpm, then add 2.3g of manganese acetate tetrahydrate at the same speed And stir and mix uniformly to obtain a clear and transparent solution X; dissolve 3.2g of trimesic acid in a mixed solution of 180mL absolute ethanol and primary deionized water (volume ratio 2:1) and stir and mix uniformly to obtain a solution Y, then at 410rpm Use BT100-2J peristaltic pump under the condition -1 The flow rate was added to the clear and transparent solution X obtained in step S1, and it was left to stand for several hours, and then the resulting precipitate was collected by centrifugation, and the resulting precipitate was washed with absolute ethanol several times to remove surfactants and residual ions, and then the resulting product was Dry in a vacuum...

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 preparation method and application of an in-situ carbon-coated binary transition metal oxide heterojunction bowl-shaped nanocomposite material. Firstly, manganese acetate tetrahydrate and trimesic acid are used as reaction raw materials, and polyvinylpyrrolidone As a surfactant, the precursor powder of carbon-coated binary transition metal oxide heterojunction bowl-shaped nanocomposites is prepared by liquid phase reaction and precise control of liquid flow rate, and then calcined in an argon atmosphere to obtain a bowl-like The in-situ carbon-coated binary transition metal oxide heterojunction nanocomposite material, the nanocomposite material shows excellent potassium storage performance when used as a potassium electric negative electrode, and the present invention prepares MnO‑Mn 3 o 4 @C‑N bowl-shaped nanocomposites have uniform morphology, rapid preparation and uniform grain size distribution.

Description

technical field [0001] The invention belongs to the technical field of negative electrode materials for potassium ion batteries, and in particular relates to a preparation method of an in-situ carbon-coated binary transition metal oxide heterojunction bowl-shaped nanocomposite material and its application in potassium ion batteries. Background technique [0002] Energy is an important pillar of our lives. Lithium-ion batteries, as one of the representatives of higher-performance energy storage devices, have greatly improved our lives. With the rapid popularization and application of small electronic devices such as smartphones, ipads, and large energy storage devices such as household trams and electric vehicles, at the same time, the content distribution of lithium in the earth's crust is only 0.0065% and the distribution of lithium resources is uneven. This largely limits its development in the field of large-scale energy storage. In order to overcome many obstacles, it ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/36H01M4/50H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCH01M4/0471H01M4/366H01M4/364H01M4/502H01M4/625H01M10/054B82Y30/00B82Y40/00H01M2004/027Y02E60/10
Inventor 刘代伙张爽刘定毅陈忠伟杨林白正宇
Owner HENAN NORMAL 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