Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

In-situ device for testing absorption spectrum of synchrotron radiation X rays of battery electrode material

A battery electrode and X-ray technology, applied in the field of in-situ devices of synchrotron radiation X-ray absorption spectroscopy, can solve problems such as poor performance, capacity loss, poor stability, etc., and achieve the effect of overcoming non-repeatability, simple operation and good sealing performance

Pending Publication Date: 2018-08-14
UNIV OF SCI & TECH OF CHINA
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The experimental results found that LiFePO 4 There are some small micro-regions in the material, and lithium intercalation occurs preferentially during discharge, resulting in heterogeneity in material composition, mechanical internal stress, and capacity loss (Science 2016; 353:566-571)
[0006] Although the battery in-situ experiment based on synchrotron radiation technology has been widely used, this device has poor performance, poor stability, and short life compared with traditional battery test devices, and cannot perform high-magnification tests.

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
  • In-situ device for testing absorption spectrum of synchrotron radiation X rays of battery electrode material
  • In-situ device for testing absorption spectrum of synchrotron radiation X rays of battery electrode material
  • In-situ device for testing absorption spectrum of synchrotron radiation X rays of battery electrode material

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0052] Depend on Figure 1 to Figure 6 As shown, the present invention provides a synchrotron radiation X-ray absorption spectroscopy device for analyzing the electrochemical properties of electrode materials, including: a negative electrode part, an internal insulation and pressure part, and a positive electrode part. The negative pole part includes negative pole a, beryllium sheet a, rubber ring a, negative pole b and four insulating sleeves, and the negative pole a and negative pole b are provided with threaded through holes, insulating sleeve through holes and light-transmitting through holes; The beryllium sheet a is located at the light-transmitting hole between the negative electrode a and the negative electrode b, and the insulating sleeve is used to insulate and fix the entire device. The internal insulation and pressure part includes a rubber ring b, a polytetrafluoroethylene sleeve, a spring, a top sheet and a beryllium sheet b, the beryllium sheet b is fixed on the...

Embodiment 1

[0057] with V 2 C-Sn is used as the active material of the working electrode, N-methylpyrrolidone (NMP) is used as the solvent, it is ground and mixed with the conductive agent acetylene black (AB) and the binder vinylidene fluoride (PVDF), and then the slurry is The material is evenly coated on the aluminum foil, dried overnight in a vacuum oven at 110°C, then rolled on a tablet press to make it compact, and finally cut out electrode sheets with a diameter of 16mm on a slicer. When the battery is assembled, the following steps need to be operated in a glove box filled with high-purity argon, and the water content and oxygen content are both less than 0.1ppm. First combine the positive electrode a and the positive electrode b, tighten the four screws on the positive electrode part; snap the polytetrafluoro sleeve into the groove of the positive electrode a, and then put the cut electrode piece into the polytetrafluoro sleeve of the device of the present invention In the cylin...

Embodiment 2

[0064] with V 2 C-Sn is used as the active material of the working electrode, N-methylpyrrolidone (NMP) is used as the solvent, it is ground and mixed with the conductive agent acetylene black (AB) and the binder vinylidene fluoride (PVDF), and then the slurry is The material is evenly coated on the aluminum foil, dried overnight in a vacuum oven at 110°C, then rolled on a tablet press to make it compact, and finally cut out electrode sheets with a diameter of 16mm on a slicer. When the battery is assembled, the following steps need to be operated in a glove box filled with high-purity argon, and the water content and oxygen content are both less than 0.1ppm. First combine the positive electrode a and the positive electrode b, tighten the four screws on the positive electrode part; snap the polytetrafluoro sleeve into the groove of the positive electrode a, and then put the cut electrode piece into the polytetrafluoro sleeve of the device of the present invention In the barre...

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 discloses an in-situ device for testing the absorption spectrum of synchrotron radiation X rays of a battery electrode material, a negative-electrode part, an internal insulated and pressure part and a positive-electrode part, wherein the negative-electrode part comprises a negative electrode a, a beryllium piece, a rubber ring a, a negative electrode b and four insulated sleeves; the internal insulated and pressure part comprises a rubber ring b, a polytetrafluoroethylene sleeve, a spring, a jacking piece and a beryllium piece b; the positive-electrode part comprises a positiveelectrode a, a rubber ring c, a beryllium piece c and a positive electrode b; the positive electrode a and the positive electrode b are respectively provided with thread through holes and a light-transmitting through hole. By adoption of a detachable and cleanable connecting structure, the in-situ device disclosed by the invention has the characteristics of good sealing property and internal insulation, realizes the advantages of high repeatability, simple operation, convenient carrying and cost reduction of in-situ test, is applicable to acquisition of data of in-situ analysis of the electrode material by the synchrotron radiation X rays and can be used for study on the physical and chemical properties of various energy storage devices such as lithium-ion batteries, sodium-ion batteries and supercapacitors.

Description

technical field [0001] The invention relates to a lithium ion, sodium ion and magnesium ion battery material and electrochemical technology, in particular to an in-situ device for testing the synchrotron radiation X-ray absorption spectrum of battery electrode materials. Background technique [0002] Secondary batteries such as lithium-ion, sodium-ion and magnesium-ion play an important role in energy storage technology. Lithium-ion batteries have been commercialized and are widely used in the consumer electronics market and new energy vehicles. Compared with Li, Na is more abundant and cheaper, and Na-ion batteries provide a better solution for its large-scale applications in the field of large-scale energy storage systems. However, many problems in the process of sodium ion migration and electrode material structure transformation need to be resolved with the help of advanced testing methods. Magnesium-ion batteries are currently in the laboratory research stage, and the...

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): G01N23/083
CPCG01N23/083Y02E60/10
Inventor 储旺盛黄伟峰齐家新余蓁万萍
Owner UNIV OF SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com