K6Si2O7 potassium fast ion conductor co-doped with P5+, Al3+, Be2+ and Zn2+ ions and preparation method thereof

An ion conductor, ion technology, applied in electrical components, battery electrodes, circuits, etc., to achieve the effect of reducing grain boundary voids

Inactive Publication Date: 2019-10-15
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 construc

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
  • K6Si2O7 potassium fast ion conductor co-doped with P5+, Al3+, Be2+ and Zn2+ ions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0011] Example 1: Put K 2 CO 3 : NH 4 H 2 PO 4 : Al 2 O 3 : SiO 2 : BeO: ZnO according to K 6.24 Be 0.1 Al 0.1 P 0.02 Zn 0.02 Si 1.7 8 O 7 The stoichiometric molar ratio of the mixture is uniformly mixed and added with anhydrous ethanol with a mass of 3% by mass of the mixture, and ball milled in a ball mill at a speed of 200 revolutions per minute for 11 hours. After the ball milling is completed, in a vacuum oven at 60°C (the gas pressure in the oven is 3Pa ) Dry for 3 hours, take it out and re-grind in an agate mill for 12 minutes. The ground powder is heated to 450°C at a rate of 5°C / min in an air atmosphere and kept at 450°C for 3 hours and then cooled in the furnace; The powder is ground again for 10 minutes in an agate milling bowl. The ground powder is heated to 660°C at a rate of 6°C / min in an air atmosphere and kept at 660°C for 10 hours, and then cooled in the furnace; After soaking in the solution for 5 minutes, filter, dry and in the press 7 Pressed into flakes unde...

Example Embodiment

[0012] Example 2: Put K 2 CO 3 : NH 4 H 2 PO 4 : Al 2 O 3 : SiO 2 : BeO: ZnO according to K 6.45 Be 0.2 Al 0.2 P 0.05 Zn 0.05 Si 1.5 5 O 7 The stoichiometric molar ratio of the mixture is uniformly mixed, and anhydrous ethanol with a mass of 8% by mass of the mixture is added. The ball mill is ball milled in a ball mill at a speed of 400 rpm for 45 hours. After the ball milling is completed, in a vacuum oven at 110 ℃ (the gas pressure in the oven is at 20Pa) dry for 10 hours, take it out and re-grind in an agate mill for 30 minutes. The ground powder is heated to 550°C at a rate of 30°C / min in an air atmosphere and kept at 550°C for 10 hours and then cooled in the furnace; after cooling The powder is ground again in an agate grinding bowl for 28 minutes. The ground powder is heated to 750°C at a rate of 15°C / min in an air atmosphere and kept for 20 hours, and then cooled in the furnace; Soak in the sodium solution for 15 minutes, filter, dry, and in the press 7 Pressed into flak...

Example Embodiment

[0013] Example 3: Put K 2 CO 3 : NH 4 H 2 PO 4 : Al 2 O 3 : SiO 2 : BeO: ZnO according to K 6.36 Be 0.15 Al 0.15 P 0.03 Zn 0.03 Si 1.67 O 7 The stoichiometric molar ratio of the mixture is uniformly mixed, and anhydrous ethanol with a mass of 5% by mass of the mixture is added, and ball milled in a ball mill at a speed of 300 rpm for 40 hours. After the ball milling is completed, in a vacuum oven at 90°C (the gas pressure in the oven is at 18Pa) dry for 8 hours, take it out and re-grind in an agate mill for 20 minutes. The ground powder is heated to 500°C at a rate of 25°C / min in an air atmosphere and kept for 7 hours and then cooled in the furnace; after cooling The powder is ground again in an agate grinding bowl for 20 minutes. The ground powder is heated to 700°C for 15 hours at a rate of 10°C / min in an air atmosphere, and then cooled in the furnace; Soaked in sodium solution for 10 minutes, filtered, dried and placed in a press in a 5×10 7 Pressed into flakes under Pa press...

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
Conductivityaaaaaaaaaa
Login to view more

Abstract

A K6Si2O7 potassium fast ion conductor co-doped with P5+, Al3+, Be2+ and Zn2+ ions and a preparation method thereof are provided. The K6Si2O7 potassium fast ion conductor is characterized in that thestoichiometric formula is K<6+2*x+y-z-2*m>Be<x>Al<y>P<z>Zn<m>Si<2-x-y-z>O<7>, wherein x is equal to 0.1-0.2, y is equal to 0.1-0.2, z is equal to 0.02-0.05, and m is equal to 0.02-0.05; and the conductivity of potassium ions at room temperature is higher than 5*10<-4>S/cm. Al3+ and Be2+ partially replace Si4+ ions to produce interstitial potassium ions in a crystal, so as to reduce the activationenergy of potassium ion migration. The electronic conductivity of the fast ionic conductor is further reduced through doping of P5+. The size of the potassium ion migration channels is adjusted through doping of Be2+ with small ion radius in order to adapt to the rapid migration of potassium ions. Zn2+ partially replaces potassium ions to cause cation vacancies, so as to increase the number of potassium ion migration channels. The surface of K6Si2O7 particles is modified in the preparation process to make the conductor easy to sinter. The synergistic effect makes the conductivity of potassiumions of the potassium fast ionic conductor exceed 5*10<-4>S/cm at room temperature, which is closer to the conductivity of potassium ions of 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): H01M4/36H01M4/485
CPCH01M4/364H01M4/485Y02E60/10
Inventor 水淼舒杰任元龙
Owner NINGBO UNIV
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