Flexible carbon film-coated amorphous Sn-Ni-P sandwich structure nanomaterial and preparation method and application thereof

A nanomaterial and carbon film technology, applied in nanotechnology, nanotechnology, structural parts, etc., can solve the problems of unsatisfactory cycle stability and low specific capacity, and achieve excellent cycle stability performance, high specific capacity, and regular morphology. Effect

Active Publication Date: 2018-04-10
NANJING NORMAL UNIVERSITY
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its specific capacity is still low, especially the cycle stability during long-term operation is not ideal, and there is still a long way to go as an anode material for lithium-ion batteries.

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
  • Flexible carbon film-coated amorphous Sn-Ni-P sandwich structure nanomaterial and preparation method and application thereof
  • Flexible carbon film-coated amorphous Sn-Ni-P sandwich structure nanomaterial and preparation method and application thereof
  • Flexible carbon film-coated amorphous Sn-Ni-P sandwich structure nanomaterial and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of preparation method of the Sn-Ni-P structure material that the flexible carbon film of sandwich shape wraps, comprises the following steps:

[0035] 1) Preparation of CS-EDTMP / Sn-Ni composite cyanogel: prepare 2mg / mL acetic acid solution (1wt%) (CS) with dissolved chitosan and 0.2mol / L SnCl 4 Mix the solution, add 0.2mol / L ethylenediaminetetramethylene phosphoric acid (EDTMP) and 0.2mol / L K 2 Ni(CN) 4 The mixed solution, the two solutions are mixed evenly at room temperature and left for a period of time to form a light blue gel;

[0036] 2) Prepare a flexible carbon film-coated Sn-Ni-P material with a sandwich structure: freeze-dry the CS-EDTMP / Sn-Ni composite cyanide rubber prepared in step 1), and dry it at 2K / min under a nitrogen atmosphere. The temperature was raised to 600°C for heat treatment, and kept at this temperature for 2 hours, then cooled, washed and dried by centrifugation to obtain the final product.

Embodiment 2

[0038] A kind of preparation method of the Sn-Ni-P structure material that the flexible carbon film of sandwich shape wraps, comprises the following steps:

[0039] 1) Preparation of CS-EDTMP / Sn-Ni composite cyanogel: prepare 4mg / mL acetic acid solution (1wt%) (CS) with dissolved chitosan and 0.2mol / L SnCl 4 Mix the solution, add 0.2mol / L ethylenediaminetetramethylene phosphoric acid (EDTMP) and 0.2mol / L K 2 Ni(CN) 4 The mixed solution, the two solutions are mixed evenly at room temperature and left for a period of time to form a light blue gel;

[0040] 2) Prepare a flexible carbon film-coated Sn-Ni-P material with a sandwich structure: freeze-dry the CS-EDTMP / Sn-Ni composite cyanide rubber prepared in step 1), and dry it at 2K / min under a nitrogen atmosphere. The temperature was raised to 600°C for heat treatment, and kept at this temperature for 2 hours, then cooled, washed and dried by centrifugation to obtain the final product.

Embodiment 3

[0042] A kind of preparation method of the Sn-Ni-P structure material that the flexible carbon film of sandwich shape wraps, comprises the following steps:

[0043] 1) Preparation of CS-EDTMP / Sn-Ni composite cyanogel: prepare 6mg / mL acetic acid solution (1wt%) (CS) with dissolved chitosan and 0.2mol / L SnCl 4 Mix the solution, add 0.2mol / L ethylenediaminetetramethylene phosphoric acid (EDTMP) and 0.2mol / L K 2 Ni(CN) 4 The mixed solution, the two solutions are mixed evenly at room temperature and left for a period of time to form a light blue gel;

[0044] 2) Prepare a flexible carbon film-coated Sn-Ni-P material with a sandwich structure: freeze-dry the CS-EDTMP / Sn-Ni composite cyanide rubber prepared in step 1), and dry it at 2K / min under a nitrogen atmosphere. The temperature was raised to 600°C for heat treatment, and kept at this temperature for 2 hours, then cooled, washed and dried by centrifugation to obtain the final product.

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
Concentrationaaaaaaaaaa
Login to view more

Abstract

The invention discloses a flexible carbon film coated Sn-Ni-P nano-material and a preparation method and application as a negative electrode material for lithium ion batteries thereof. In the materialstructure, Sn-Ni-P nanoparticles with an amorphous structure are coated with a flexible carbon film containing N element, and the Sn-Ni-P nanoparticles are uniformly embedded in a flexible carbon film and cross-linked to form a sandwich structure. Compared with the prior art, the preparation method has the advantages of simple preparation process, low cost, and easy realization of large-scale industrial production; at the same time, the obtained sandwich nanostructure material has a high degree of graphitization, a larger specific surface area and a relatively smooth electron or ion transmission channel; the material exhibits high specific capacity and excellent cycle stability as the negative electrode material for the lithium ion batteries.

Description

technical field [0001] The invention relates to a flexible carbon film-coated amorphous Sn-Ni-P sandwich structure nanometer material, a preparation method thereof, and an application thereof as a lithium ion battery negative electrode material, belonging to the technical field of lithium ion battery negative electrode materials. Background technique [0002] As a new type of power source, lithium-ion batteries are widely used in various portable electronic devices, such as laptops, mobile phones, etc. , digital cameras, etc., have been widely used and have good development prospects. At present, commercial lithium-ion batteries use a wide range of sources and stable graphite-like carbon materials as negative electrodes, but their theoretical specific capacity is low, only 372mAhg -1 , which greatly limits its commercial application. Sn-based materials have a high theoretical specific capacity (992mA h g -1 ), better security, is considered as an ideal substitute for comm...

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): H01M4/36H01M4/58H01M4/62H01M10/0525B82Y30/00
CPCH01M4/366H01M4/5805H01M4/625H01M10/0525B82Y30/00Y02E60/10
Inventor 孙冬梅李同飞王一张梦如徐林唐亚文
Owner NANJING NORMAL UNIVERSITY
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