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Method for preparing sodium-zirconium-silicon-phosphorus compound solid electrolyte

A solid electrolyte, solid electrolyte membrane technology, applied in solid electrolytes, non-aqueous electrolytes, circuits, etc., can solve the problems of high cost, complex preparation process of solid phase method, good performance, etc. Battery preparation, low price effect

Active Publication Date: 2019-02-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the solid-phase method is complicated, and generally requires multiple ball milling and high-temperature heat treatment, which has high cost and good performance; the preparation process of the sol-gel method is relatively simple, but the performance of the obtained electrolyte material is insufficient. Compared with the solid-phase method, its room temperature ion 1-3 orders of magnitude lower conductivity
Other preparation processes mostly use advanced equipment, which is not conducive to cost reduction and large-scale application

Method used

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  • Method for preparing sodium-zirconium-silicon-phosphorus compound solid electrolyte
  • Method for preparing sodium-zirconium-silicon-phosphorus compound solid electrolyte
  • Method for preparing sodium-zirconium-silicon-phosphorus compound solid electrolyte

Examples

Experimental program
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Effect test

example 1

[0037] Example 1 uses nitrate and glycine as raw materials without any pretreatment. First weigh 15.4mmol of lithium nitrate, 6mmol of lanthanum nitrate, 4mmol of zirconium nitrate, 0.48mmol of aluminum nitrate and 12.94mmol of glycine, dissolve them in deionized water, put them on an electric furnace, and heat until the combustion synthesis reaction occurs after evaporation to obtain white fluffy Powder material. The powder material was heated in a muffle furnace at 900° C. for 4 hours to obtain cubic phase lithium lanthanum zirconium oxide. The obtained cubic phase lithium lanthanum zirconium oxide was ball milled at a rotational speed of 300 r / min for 10 h to obtain cubic phase lithium lanthanum zirconium oxide nanopowder. The monomers polyethylene glycol diacrylate and polyethylene glycol diglycidyl ether are polymerized by adding 1wt% benzoyl peroxide, adding lithium bistrifluoromethanesulfonamide, stirring evenly and adding 10wt% lithium lanthanum Zirconium oxide powder ...

example 2

[0038] Example 2 uses nitrate and urea as raw materials without any pretreatment. First weigh 15.4mmol of lithium nitrate, 6mmol of lanthanum nitrate, 4mmol of zirconium nitrate, 0.48mmol of aluminum nitrate and 15mmol of urea, dissolve them in deionized water, place them on an electric furnace, and heat until the combustion synthesis reaction occurs after evaporation to obtain white fluffy powder body material. The powder material was cold-pressed at 200MPa into a disc with a diameter of 15mm, and then heated in a muffle furnace at 700°C for 4h to obtain the cubic phase lithium lanthanum zirconium oxide. The obtained cubic phase lithium lanthanum zirconium oxide was ball milled for 15 hours at a speed of 300 r / min to obtain lithium lanthanum zirconium oxide nanopowder. 0.1 wt% benzoyl peroxide was dissolved in 20 g of butyl acrylate, and stirred at 85°C until a uniform solution was formed. polyethylene glycol diacrylate

[0039] 5wt%, 10wt%, 15wt%, 20wt% mass fraction mixe...

example 3

[0040] Example 3 uses nitrate and glycine as raw materials without any pretreatment. First weigh 15.4mmol of lithium nitrate, 6mmol of lanthanum nitrate, 4mmol of zirconium oxynitrate, 0.48mmol of aluminum nitrate and 10mmol of glycine and dissolve them in deionized water. Powder material. The powder material was cold pressed into a disc with a diameter of 10 mm at 200 MPa, and then heated in a muffle furnace at 800 ° C for 4 h to obtain a cubic phase lithium lanthanum zirconium oxide. The obtained cubic phase lithium lanthanum zirconium oxide was ball milled for 10 h at a ball milling speed of 300 r / min to obtain lithium lanthanum zirconium oxide nanopowder. Polylactic acid polyethylene glycol diacrylate according to the mass ratio of 95 / 5, 90 / 10, 85 / 15, 80 / 20 and 75 / 25, after stirring evenly at 170°C, add 20wt% lithium lanthanum zirconium oxide powder, Stirring for 30 minutes, standing for 2 hours for in-situ cross-linking reaction to obtain a ceramic-cross-linked polymer ...

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Abstract

The invention provides a method for preparing sodium-zirconium-silicon-phosphorus compound solid electrolyte, and belongs to the technical field of electrochemical and new-energy materials. The sodium-zirconium-silicon-phosphorus compound solid electrolyte is prepared by adopting a simple self-propagating combustion synthesizing technology with simplicity and quickness in operation, precursor is synthesized in one step, the sodium-zirconium-silicon-phosphorus compound solid electrolyte nano-powder has a grain size of 300-600nm and uniformly distributed elements. Furthermore, the method for preparing the ceramic-crosslinked polymer flexible compound solid electrolyte adopts an in-situ polymerization technology, no solvent is added in the preparation process, the ceramic powder has good compatibility with polymer, and the prepared ceramic-crosslinked polymer flexible compound solid electrolyte has excellent electrochemical performance and thermal stability.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and specifically relates to a method for preparing sodium-zirconium-silicon-phosphorus solid electrolyte nanopowder and preparing a ceramic-crosslinked polymer flexible composite solid electrolyte through an in-situ polymerization method, and then applying it to an all-solid sodium ion Battery. Background technique [0002] With the continuous increase of human dependence on energy, the pressure of energy crisis, resource scarcity, and environmental pollution is increasing. The primary problem facing mankind is to change the unreasonable energy structure and develop clean energy instead of fossil energy, such as wind energy, solar energy, etc. . However, this kind of renewable energy is limited by external natural conditions, and generally has the characteristics of randomness, intermittentity, and low energy density. If the electric energy generated by it is directly input to the g...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/054
CPCH01M10/054H01M10/0565H01M2300/0082Y02E60/10
Inventor 范丽珍牛苇陈龙
Owner UNIV OF SCI & TECH BEIJING
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