Preparation method for cubic-phase lithium lanthanum zirconium oxide solid-state electrolyte nano material

A solid electrolyte, lithium lanthanum zirconium oxide technology, applied in the direction of electrolyte immobilization/gelation, circuits, electrical components, etc., can solve the problems of low cost, difficult production, etc., to achieve improved sinterability, low price, and improved boundary conductance rate effect

Active Publication Date: 2016-09-07
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the method has the advantages of low cost, large output, simple operation, high purity, and is suitable for mass production, etc., and solves the current difficult problem of industrial production of lithium lanthanum zirconium oxide

Method used

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  • Preparation method for cubic-phase lithium lanthanum zirconium oxide solid-state electrolyte nano material
  • Preparation method for cubic-phase lithium lanthanum zirconium oxide solid-state electrolyte nano material
  • Preparation method for cubic-phase lithium lanthanum zirconium oxide solid-state electrolyte nano material

Examples

Experimental program
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Effect test

example 1

[0031] 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 cold-pressed at 300MPa into a disc with a diameter of 15mm, and then heated in a muffle furnace at 900°C for 4h to obtain a cubic phase lithium lanthanum zirconium oxide. The obtained cubic phase lithium lanthanum zirconium oxide was ball milled for 10 hours at a ball milling speed of 300r / min. The ball milled powder was again cold-pressed at 300MPa into a disc with a diameter of 15mm, and fired at 1200°C for 5 hours to form a ceramic sheet at a heating rate of 1 °C / min.

[0032] Spray gold on the upper and lower surfaces of the obtained lit...

example 2

[0033] 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 a cubic phase lithium lanthanum zirconium oxide. The obtained cubic phase lithium lanthanum zirconium oxide was ball milled for 15 hours at a ball milling speed of 300r / min. The ball milled powder was again cold pressed at 200MPa into a disc with a diameter of 15mm, and then fired into a ceramic sheet after heat treatment at 1200°C for 4 hours. The heating rate was 1 °C / min.

[0034] Spray gold on the upper and lower surfac...

example 3

[0035] 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 at 200MPa into a disc with a diameter of 10mm, and then heated in a muffle furnace at 800°C for 4h to obtain a cubic phase lithium lanthanum zirconium oxide. The obtained cubic phase lithium lanthanum zirconium oxide was ball milled for 10 hours at a ball milling speed of 300r / min. The ball milled powder was again cold pressed at 200MPa into a disc with a diameter of 15mm, and then fired into a ceramic piece after heat treatment at 1200°C for 5 hours at a heating rate of 1 °C / min.

[0036] Spray gold on the upper and lower surfaces of the obtained lithium lanthanum zirconium oxide ceramic sheet, test the AC impedance at room temperature on the electrochem...

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Abstract

The present invention provides a preparation method for a cubic-phase lithium lanthanum zirconium oxide solid-state electrolyte nano material. A simple solution combustion synthesis technology is adopted, and a solid-state electrolyte material is obtained after heat treatment, and the solid-state electrolyte material has relatively high room temperature ionic conductivity and can be used as a solid-state electrolyte of a full solid-state battery. The preparation method of solution combustion synthesis is simple, and a prepared precursor is synthesized by one step, and element distribution is uniform. The layer thickness of a precursor particle is 100- 200 nano-meters, and the particle has a big specific surface area, so that element diffusion is facilitated at a high temperature, and a reaction is complete. Compared with other methods such as a sol-gel method and a solid phase method, the method has great technical advantages: low costs, high yield, simple operation and feasible industrial production.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and in particular relates to a preparation method of lithium lanthanum zirconium oxygen solid electrolyte nanomaterials. Background technique [0002] Energy and environmental protection are two key factors for the sustainable development of today's economy. The long-term burning of a large amount of fossil fuels not only consumes non-renewable energy, but also causes serious air pollution. It is imminent to use clean energy such as lithium-ion batteries to replace polluting fossil fuels, so a large number of lithium-ion devices have appeared on the market. Traditional lithium-ion batteries containing liquid organic electrolytes may be at risk of electrolyte leakage, combustion or even explosion. All-solid-state batteries, which replace traditional liquid organic electrolytes with safer solid-state electrolytes, are attracting more and more attention. The demand for large-scale ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562
CPCH01M10/0562H01M2300/0085Y02E60/10
Inventor 范丽珍董源
Owner UNIV OF SCI & TECH BEIJING
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