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

Preparation method for porous carbon modified ferric sodium pyrophosphate/carbon positive electrode material of sodium ion battery

A technology for sodium ferric phosphate pyrophosphate and sodium ion batteries, which is applied in the preparation/purification of carbon, battery electrodes, secondary batteries, etc. It can solve the problems of low electronic conductivity, achieve good rate performance, inhibit crystal growth, The effect of improving electrical conductivity

Active Publication Date: 2021-07-13
CHINA THREE GORGES UNIV
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a polyanionic compound, Na 4 Fe 3 (PO 4 ) 2 P 2 o 7 There is also the problem of low electronic conductivity, and the simplest solution is to use conductive carbon materials to modify it

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 for porous carbon modified ferric sodium pyrophosphate/carbon positive electrode material of sodium ion battery
  • Preparation method for porous carbon modified ferric sodium pyrophosphate/carbon positive electrode material of sodium ion battery
  • Preparation method for porous carbon modified ferric sodium pyrophosphate/carbon positive electrode material of sodium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 6 mmol fe (no 3 ) 3 · 9h 2 O and 1.645 g c 6 Hide 8 O 7 Formation of solution a, 4 mmol NH in deionized water of 20 mL 4 Hide 2 PO 4 And 2 mmol na 4 P 2 O 7 The solution B, 0.15 g of PVP is dissolved in 15 ml deionized water to form a solution C in 15 ml deionized water. The solution A was added to the solution B at a drop of a drop per second, and the boulder was added while drying until it was added, and the solution turned into a yellow-green suspension, i.e., a solution D; then droplets per second. The solution C was added to the solution C, and the stirring was continued for 7 h, and the freezing dryer was subjected to cryogenic dryer, and the pressure was dried under -90 ~ -80 ° C, and the pressure was dried under a pressure of 5 PA. The precursor is obtained; finally, the precursor is placed In the tube furnace, in Ar-H 2 After the mixed atmosphere is predefined at 300 ° C, after 6 h, then 10 h at 500 ° C for 10 h to obtain NA 4 FE 3 (Po 4 ) 2 P 2 O 7 / C composite, ...

Embodiment 1-1

[0033] Implementation steps with Comparative Example 1, only NA + , Fe 3+ And PO 4 3- P 2 O 7 4- The molar ratio of four ions is 4: 3: 1: 1, then NA 4 P 2 O 7 , Fe (NO 3 ) 3 · 9h 2 O, NH 4 Hide 2 PO 4 NA 4 P 2 O 7 8 mmol, 6 mmol, 2 mmol, 2 mmol, get NA 4 FE 3 (Po 4 ) 2 P 2 O 7 / C composite, the first discharge ratio of 90.8 mahg is marked as NFPP / C-1, 0.5 C magnification. -1 After 30 cycles, its discharge ratio is 64.5 MAH g. -1 . From figure 1 In the first charge and discharge curve diagram of NFPP / C-1, we can find that the synthetic NFPP / C-1 relative to NFPP / C has a discharge platform near 2.0 V, indicating that the synthetic NFPP / C-1 is In pure phase, contain other impurities.

Embodiment 1-2

[0035] Implementation steps with Comparative Example 1, only c 6 Hide 8 O 7 With fe (no 3 ) 3 · 9h 2 O The mass ratio is 10: 1, get NA 4 FE 3 (Po 4 ) 2 P 2 O 7 / C composites, labeled NFPP / C-2, 0.1 C magnification of 96.5 MAH g -1 After 30 cycles, its discharge ratio is 87.6 MAH g. -1 .

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 relates to a preparation method for a porous carbon modified ferric sodium pyrophosphate / carbon positive electrode material of a sodium ion battery. The preparation method comprises the following steps: dissolving ferric nitrate nonahydrate and citric acid in deionized water to form a solution A, dissolving ammonium dihydrogen phosphate and sodium pyrophosphate in deionized water to form a solution B, and dissolving polyvinylpyrrolidone and sodium chloride in deionized water to form a solution C; adding the solution A into the solution B at a constant speed, and conducting stirring while dropwise adding the solution A until the mixed solution becomes a yellow green suspension after dropwise adding is completed, thereby obtaining a solution D; adding the solution D into the solution C at a constant speed, continuing stirring for 7 hours, performing freezing for 24 hours, and conducting drying for 36 hours by using a freeze dryer to obtain a precursor; and finally, putting the precursor into a tubular furnace, conducting pre-burning for 6 hours at 300 DEG C in an Ar-H2 mixed atmosphere, then finally burning the precursor at 500 DEG C, and finally, carrying out cleaning with deionized water multiple times to obtain the porous carbon modified Na4Fe3(PO4)2P2O7 / C composite positive electrode material.

Description

Technical field [0001] The present invention belongs to the technical field of sodium ion battery, and it is related to a porous carbon-modified pyrophosphate, sodium / carbon sodium ion battery positive electrode material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of renewable energy and new energy vehicles, there is a high energy density, long cycle life, good safety, and the share of the energy storage and power battery market, thereby The shortage of tight priority brought more severe. The sodium ion battery is rich in sodium resources and is low, but it is considered to be the best alternative to lithium ion batteries in the energy storage area. [0003] The sodium ion battery has a physicochemical properties similar to the lithium ion, but the electrode material that can be applied to the lithium ion battery is not necessarily suitable for the sodium ion battery due to the large radius of the sodium ion radius...

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 Applications(China)
IPC IPC(8): C01B25/42C01B25/45C01B32/05H01M4/36H01M4/58H01M4/587H01M4/62H01M10/054
CPCC01B25/42C01B25/45C01B32/05H01M4/366H01M4/5825H01M4/587H01M4/625H01M10/054C01P2004/80C01P2006/40C01P2002/72C01P2004/03Y02E60/10
Inventor 张露露彭驰李方宇杨学林
Owner CHINA THREE GORGES UNIV
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