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NASICON-type lithium ion solid electrolyte, preparation method and application thereof

A solid-state electrolyte, lithium-ion battery technology, applied in the field of lithium-ion batteries, can solve problems such as poor environmental stability, and achieve the effects of low manufacturing cost, energy reduction, and excellent thermal stability

Inactive Publication Date: 2019-04-05
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfide solid electrolytes often have high ionic conductivity, but due to their high hygroscopicity, their environmental stability is poor, and there is still a long way to go for practical commercial applications.

Method used

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  • NASICON-type lithium ion solid electrolyte, preparation method and application thereof
  • NASICON-type lithium ion solid electrolyte, preparation method and application thereof
  • NASICON-type lithium ion solid electrolyte, preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0020] The preparation method of the NASICON type lithium ion solid state electrolyte of the present embodiment comprises the following steps:

[0021] (1) the raw material CH 3 COOLi, Al(NO 3 ) 3 9H 2 O, Ti(OC 4 h 9 ) 4 , NH 4 h 2 PO 4 Weigh according to the molar ratio of (1.3-1.5):0.3:1.7:3; add the raw materials into the reaction vessel in turn, and stir continuously at room temperature to form a light yellow slurry;

[0022] (2) Slowly add ammoniacal liquor to the reaction vessel, and simultaneously add a small amount of deionized water, then magnetically stir the reaction vessel in a water bath to form a uniform and stable layered white precipitate;

[0023] (3) Place the stable layered white precipitate in a blast drying oven, heat and dry to obtain a white precursor; pre-burn the precursor according to a temperature control program to obtain a white powder;

[0024] (4) The pre-calcined powder is dry-milled by a planetary ball mill, then pressed into tablets,...

Embodiment 2

[0033] The preparation method of the NASICON type lithium ion solid state electrolyte of the present embodiment comprises the following steps:

[0034] (1) the raw material CH 3 COOLi, Al(NO 3 ) 3 9H 2 O, Ti(OC 4 h 9 ) 4 , NH 4 h 2 PO 4 Weigh according to the molar ratio of (1.3-1.5):0.3:1.7:3; add the raw materials into the reaction vessel in turn, and stir continuously at room temperature to form a light yellow slurry;

[0035] (2) Slowly add ammoniacal liquor to the reaction vessel, and simultaneously add a small amount of deionized water, then magnetically stir the reaction vessel in a water bath to form a uniform and stable layered white precipitate;

[0036] (3) Place the stable layered white precipitate in a blast drying oven, heat and dry to obtain a white precursor; pre-burn the precursor according to a temperature control program to obtain a white powder;

[0037](4) The pre-calcined powder is dry-milled by a planetary ball mill, then pressed into tablets, ...

Embodiment 3

[0047] The preparation method of the NASICON type lithium ion solid state electrolyte of the present embodiment comprises the following steps:

[0048] (1) the raw material CH 3 COOLi, Al(NO 3 ) 3 9H 2 O, Ti(OC 4 h 9 ) 4 , NH 4 h 2 PO 4 Weigh according to the molar ratio of (1.3-1.5):0.3:1.7:3; add the raw materials into the reaction vessel in turn, and stir continuously at room temperature to form a light yellow slurry;

[0049] (2) Slowly add ammoniacal liquor to the reaction vessel, and simultaneously add a small amount of deionized water, then magnetically stir the reaction vessel in a water bath to form a uniform and stable layered white precipitate;

[0050] (3) Place the stable layered white precipitate in a blast drying oven, heat and dry to obtain a white precursor; pre-burn the precursor according to a temperature control program to obtain a white powder;

[0051] (4) The pre-calcined powder is dry-milled by a planetary ball mill, then pressed into tablets,...

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Abstract

The disclosure relates to a NASICON-type lithium ion solid electrolyte and a preparation method and application thereof. The stoichiometric equation of the solid electrolyte is Li[1+x]AI[x]Ti[2-x](PO[4])[3], wherein 0<=x<=0.5. The solid electrolyte having excellent performance is synthesized by controlling the heating rate, the burn-in temperature, the burn-in time, the calcination temperature, the calcination time, etc., so that the room temperature ionic conductivity of the solid electrolyte exceeds 10<-4> S / cm. The advantage is that: by Al<3+> doping, the concentration of lithium ions increases; and the increase of carrier concentration increases the probability that lithium ions occupy both AI and AII positions, and reduces the energy required for lithium ions in the transition process, so that the room temperature ionic conductivity of the solid electrolyte exceeds 10<-4> / cm, making the solid electrolyte suitable for all-solid-state batteries, facilitating the design and assemblyof all-solid-state lithium-ion batteries.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a NASICON type lithium ion solid electrolyte, a preparation method and an application thereof. Background technique [0002] With the development of industrial society, the increase in energy consumption and the depletion of non-renewable resources, people's demand for new energy is becoming more and more urgent, and the requirements for energy storage technology are becoming more and more stringent. At present, the most widely used energy storage method is electrochemical energy storage, that is, using battery devices to perform electrochemical reactions to convert energy. Lithium-ion batteries are considered to have very broad development prospects in energy storage due to their high energy density and long service life. [0003] However, at present, commercial lithium-ion batteries often use organic electrolytes. Due to their flammability and leakage, there are ...

Claims

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Application Information

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IPC IPC(8): H01M10/0562H01M10/0525
CPCH01M10/0525H01M10/0562H01M2300/0068Y02E60/10
Inventor 杨程响
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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