A simple method for synthesizing chromium oxide

A chromium oxide, a simple technology, applied in the direction of chromium oxide/hydrate, electrochemical generator, structural parts, etc., can solve the problems of difficult wide-scale application, harsh conditions, etc., and achieve the effect of simple and easy method

Active Publication Date: 2020-05-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current synthesis of pure phase Cr 3 o 8 , Cr 8 o 21 There are two methods for chromium oxides, one is to synthesize under high pressure or pure oxygen conditions, as described in patent CN2004100373690, these synthesis methods have harsh conditions and are difficult to achieve large-scale applications

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
  • A simple method for synthesizing chromium oxide
  • A simple method for synthesizing chromium oxide
  • A simple method for synthesizing chromium oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh 3g CrO 3 , calcined in the air, the temperature fluctuates back and forth from 260 to 280 ° C, the temperature from 260 to 280 ° C and then back to 260 is a fluctuation cycle, the time used for one fluctuation cycle is 1 minute, and the pure phase Cr is obtained after 48 hours of calcination 3 o 8 . Cr 3 o 8 The X-ray diffraction (XRD) pattern of figure 1 shown.

Embodiment 2

[0015] Weigh 3g CrO 3 , calcined in the air, the temperature fluctuates back and forth from 264 to 277 ° C, the temperature from 264 to 277 ° C and then back to 264 is one fluctuation cycle, and the time used for one fluctuation cycle is 2 minutes, and the pure phase Cr is obtained after calcination for 72 hours 3 o 8 (Known from X-ray Diffraction (XRD)).

Embodiment 3

[0017] Take 3g CrO 3 Calcined in the air, the temperature fluctuates back and forth from 280 to 300 °C, and the temperature from 280 to 300 °C and then back to 280 is a fluctuation cycle, and the time used for one fluctuation cycle is 1 minute, and Cr is obtained after 48 hours of reaction. 8 o 21 . Cr 8 o 21 The X-ray diffraction (XRD) pattern of figure 2 shown.

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 provides a method for easily synthesizing chromium oxides. The method includes the specific steps that CrO3 is weighed and calcined in air, the temperature fluctuates from 260-264 DEG Cto 277-280 DEG C back and forth, one fluctuation period lasts when the temperature rises to 277-280 DEG C from 260-264 DEG C and then returns to 260-264 DEG C, the time used for one fluctuation periodis 0.5-3 min, calcination is carried out for 48 hours or longer, and the pure-phase Cr3O8 is obtained. Compared with the prior art, no special synthesis environments such as high temperature and highpressure and pure oxygen are needed, the pure-phase Cr3O8 or Cr8O21 can be synthesized in the air, and the method is simple and easy to carry out and suitable for being applied on a large area.

Description

technical field [0001] The present invention relates to the synthesis of chromium oxide, in particular to a method for simply synthesizing chromium oxide. Background technique [0002] Chromium oxide is known as a cathode material for lithium-ion batteries because of its high energy density and high capacity. 3 o 8 , Cr 8 o 21 The actual reversible specific capacity can reach 250mAh / g. However, the current synthesis of pure phase Cr 3 o 8 , Cr 8 o 21 There are two methods for isochromium oxides, one is to synthesize under high pressure or pure oxygen, as described in patent CN2004100373690, these synthesis methods require harsh conditions and are difficult to achieve wide-scale application. One is calcined in air, but it is easy to form Cr 3 o 8 , Cr 8 o 21 , Cr 2 o 5 Triadic mixture CrO x . Contents of the invention [0003] The present invention adopts as a simple synthetic pure phase Cr 3 o 8 or Cr 8 o 21 Chromium oxide method. The present invention...

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): C01G37/02H01M4/48H01M10/0525
CPCC01G37/02C01P2002/72H01M4/48H01M10/0525Y02E60/10
Inventor 姜鲁华徐杉孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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