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

Liquid phase synthesis multi-ion-doped potassium fast ion conductor and preparation method thereof

A technology of ion doping and liquid phase synthesis, which is applied in electrochemical generators, electrical components, circuits, etc., to achieve the effect of reducing grain boundary gaps and reducing migration activation energy

Inactive Publication Date: 2019-10-25
NINGBO UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the potassium ion conductors that are essential for the construction of potassium ion all-solid-state batteries are still basically blank.

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
  • Liquid phase synthesis multi-ion-doped potassium fast ion conductor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: the solid KNO 3 : Fe(NO 3 ) 3 9H 2 O according to K 6.25 Fe 0.05 be 0.2 Ti 0.05 Si 1.75 o 7 The ratio of the stoichiometric molar ratio of the corresponding elements in the mixture is uniformly mixed, while vigorously stirring, add deionized water until all solid substances are dissolved, record the mass of the added deionized water, and then continue to add the recorded deionized water 1.0 times the quality of deionized water and stir evenly, then continue to stir and add 35wt% beryllium nitrate aqueous solution until the amount of beryllium in the solution system meets K 6.25 Fe 0.05 be 0.2 Ti 0.05 Si 1.75 o 7 The stoichiometric ratio, and the amount of tartaric acid added is 1.5 times the total amount of all metal ions and fully stirred until completely dissolved; record this solution as solution A; will meet K 6.25 Fe 0.05 be 0.2 Ti 0.05 Si 1.75 o 7 Tetraethyl orthosilicate and tetrabutyl titanate of the stoichiometric ratio are diss...

Embodiment 2

[0012] Embodiment 2: the solid KNO 3 : Fe(NO 3 ) 3 9H 2 O according to K 6.25 Fe 0.05 be 0.2 Ti 0.05 Si 1.75 o 7 The ratio of the stoichiometric molar ratio of the corresponding elements in the mixture is uniformly mixed, while vigorously stirring, add deionized water until all solid substances are dissolved, record the mass of the added deionized water, and then continue to add the recorded deionized water 1.5 times the quality of deionized water and stir evenly, then continue to stir and add 35wt% beryllium nitrate aqueous solution until the amount of beryllium in the solution system meets K 6.25 Fe 0.05 be 0.2 Ti 0.05 Si 1.75 o 7 The stoichiometric ratio, and the amount of tartaric acid added is 2.5 times the total amount of all metal ions and fully stirred until completely dissolved; record this solution as solution A; will meet K 6.25 Fe 0.05 be 0.2 Ti 0.05 Si 1.75 o 7 Tetraethyl orthosilicate and tetrabutyl titanate of the stoichiometric ratio are diss...

Embodiment 3

[0013] Embodiment 3: the solid KNO 3 : Fe(NO 3 ) 3 9H 2 O according to K 6.25 Fe 0.05 be 0.2 Ti 0.05 Si 1.75 o 7 The ratio of the stoichiometric molar ratio of the corresponding elements in the mixture is uniformly mixed, while vigorously stirring, add deionized water until all solid substances are dissolved, record the mass of the added deionized water, and then continue to add the recorded deionized water 1.3 times the quality of deionized water and stir evenly, then continue to stir and add 35wt% beryllium nitrate aqueous solution until the amount of beryllium in the solution system meets K 6.25 Fe 0.05 be 0.2 Ti 0.05 Si 1.75 o 7 The stoichiometric ratio, and the amount of tartaric acid added is 2.1 times the total amount of all metal ions and fully stirred until completely dissolved; record this solution as solution A; will meet K 6.25 Fe 0.05 be 0.2 Ti 0.05 Si 1.75 o 7 Tetraethyl orthosilicate and tetrabutyl titanate of the stoichiometric ratio are diss...

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 liquid phase synthesis multi-ion-doped potassium fast ion conductor and a preparation method thereof. The liquid phase synthesis multi-ion-doped potassium fast ion conductoris characterized in that the stoichiometric formula is K<6.25>Fe<0.05>Be<0.2>Ti<0.05>Si<1.75>O<7>; Be<2+> is used for partially substituting Si<4+> ions, and interstitial potassium ions are generatedin a crystal to reduce the migration activation energy of the potassium ions; migration channels of the potassium ions are adjusted by doping Be<2+> with a small ionic radius to adapt to the rapid migration of the potassium ions; a distorted lattice structure is formed by partially doping Ti<4+> to increase lattice imperfection to facilitate potassium ion conduction; cationic vacancies are formedby partially doping Fe<3+> to increase migration paths of the potassium ions; and in the preparation process, the surface of K6Si2O7 particles is modified to form easy sintering characteristics. The synergistic effects enable the normal temperature potassium ion conductivity of the potassium fast ion conductor to exceed 5*10<-4> S / cm and to be closer to the potassium ion conductivity of a liquid electrolyte.

Description

technical field [0001] The invention relates to the field of manufacturing a solid potassium fast ion conductor. Background technique [0002] Lithium-ion batteries have absolute advantages such as high volume, high weight-to-energy ratio, high voltage, low self-discharge rate, no memory effect, long cycle life, and high power density. They have an annual share of more than 30 billion US dollars in the global mobile power market and far exceed other The market share of batteries is the most promising chemical power source [Wu Yuping, Wan Chunrong, Jiang Changyin, Lithium-ion Secondary Batteries, Beijing: Chemical Industry Press, 2002.]. At present, most of the lithium-ion secondary batteries at home and abroad use liquid electrolytes. Liquid lithium-ion batteries have some disadvantages, such as: liquid organic electrolytes may leak, and may explode at too high a temperature, causing safety accidents, and cannot be used in some applications. Occasions with high safety requi...

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): C04B35/16H01M10/0562H01M10/054
CPCC04B35/16C04B2235/3201C04B2235/3272C04B2235/443C04B2235/48C04B2235/96H01M10/054H01M10/0562H01M2300/0071Y02E60/10
Inventor 水淼
Owner NINGBO 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