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Porous/non-porous composite lithium ion conductor material

A technology of conductor materials and ion conductors, applied in the field of preparation of solid electrolyte materials, can solve problems such as unsatisfactory commercial applications, and achieve the effect of improving total conductivity and high lithium ion conductivity

Active Publication Date: 2021-04-16
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It still cannot meet the needs of commercial applications, so improving its ionic conductivity has become an important research hotspot at present.

Method used

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  • Porous/non-porous composite lithium ion conductor material
  • Porous/non-porous composite lithium ion conductor material
  • Porous/non-porous composite lithium ion conductor material

Examples

Experimental program
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Effect test

Embodiment 1

[0019] According to the chemical formula Li 0.33 La 0.56 TiO 3 Determination of raw material LiOH·H by stoichiometric ratio 2 O (of which LiOH·H 2 O weighed 10% more to compensate for the loss of lithium at high temperature), La(NO 3 ) 3 ·6H 2 O, butyl titanate, CTAB. Dissolve CTAB in deionized water, then add La(NO 3 ) 3 ·6H 2 Stir at room temperature for 30min, dissolve butyl titanate in isopropanol and slowly add it dropwise into the above nitrate solution, stir for 45min, then add LiOH·H 2 O, stirred for 1h and then transferred to the reactor, and reacted at 180°C for 36h. Take it out and dry it, place it in a box-type muffle furnace to raise the temperature to 500°C at a rate of 5°C / min, keep it warm for 4 hours, then raise the temperature to 800°C, keep it warm for 2 hours, take it out and grind it fully, and then use a tablet press to form it. In the muffle furnace, the temperature was raised to 800°C at a rate of 5°C / min, kept for 2 hours, then raised to 135...

Embodiment 2

[0022] According to the chemical formula Li 0.33 La 0.56 TiO 3 Determination of raw material LiOH·H by stoichiometric ratio 2 O (of which LiOH·H 2 O weighed 10% more to compensate for the loss of lithium at high temperature), La(NO 3 ) 3 ·6H 2 O, butyl titanate. Take La(NO 3 ) 3 ·6H 2 O was dissolved in deionized water, stirred at room temperature for 30 minutes, dissolved butyl titanate in isopropanol and slowly added to the above nitrate solution, stirred for 45 minutes, and then added LiOH·H 2 O, stirred for 1h and then transferred to the reactor, and reacted at 180°C for 36h. Take it out and dry it, place it in a box-type muffle furnace to raise the temperature to 500°C at a rate of 5°C / min, keep it warm for 4 hours, then raise the temperature to 800°C, keep it warm for 2 hours, take it out and grind it fully, and then use a tablet press to form it. In the muffle furnace, the temperature was raised to 800°C at a rate of 5°C / min, kept for 2 hours, then raised to ...

Embodiment 3

[0025] According to the chemical formula Li 0.33 La 0.56 TiO 3 Determination of raw material LiOH·H by stoichiometric ratio 2 O (of which LiOH·H 2 O weighed 10% more to compensate for the loss of lithium at high temperature), La(NO 3 ) 3 ·6H 2 O, butyl titanate, CTAB. Dissolve CTAB in deionized water, add 0.5wt% non-porous LLTO lithium ion conductor powder, stir at room temperature for 1 h, add La(NO 3 ) 3 ·6H 2 Stir at room temperature for 30min, dissolve butyl titanate in isopropanol and slowly add it dropwise into the above nitrate solution, stir for 45min, then add LiOH·H 2 O, stirred for 1h and then transferred to the reactor, and reacted at 180°C for 36h. Take it out and dry it, place it in a box-type muffle furnace to raise the temperature to 500°C at a rate of 5°C / min, keep it warm for 4 hours, then raise the temperature to 800°C, keep it warm for 2 hours, take it out and grind it fully, and then use a tablet press to form it. In the muffle furnace, the temp...

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Abstract

The invention discloses a lithium ion conductor material with a porous and non-porous composite structure, and belongs to the field of preparation of solid electrolyte materials of solid lithium ion batteries. The material is realized by doping non-porous solid lithium ion conductor material powder; The non-porous solid-state lithium ion conductor powder is selected from Li1.3Al0.3Ti1.7(PO4)3(LATP) and Li0.33La0.56TiO3(LLTO); the doping amount of the LATP is 0 wt%-20 wt%, and the doping amount of the LLTO is 0 wt%-25 wt%. The lithium ion conductor powder added into the lithium ion conductor material is one of LLTO and LATP. Compared with an undoped perovskite type lithium ion conductor material, the composite lithium ion conductor material prepared by the invention has the advantages that the total conductivity is obviously improved, the lithium ion transference number of the lithium ion conductor material is close to 1, and the composite lithium ion conductor material has high lithium ion conduction performance.

Description

technical field [0001] The invention belongs to the field of preparation of solid electrolyte materials for solid lithium ion batteries. It particularly relates to a porous / non-porous composite lithium ion conductor material. Background technique [0002] Organic liquid electrolytes are the most widely used in lithium batteries, such as mobile phones, notebook computers, new energy trams, etc. With the deepening of application, many problems of organic liquid electrolytes have begun to be exposed, the most important being safety issues. The electrolyte leaks, corrodes electrodes, is volatile, flammable and even explodes, burying a huge safety hazard for its development and application. , severely restricting its wide application in large-scale energy storage devices. Solid-state electrolytes have become an important direction of current research due to their high safety, good energy storage stability, high cycle life, and high chemical stability. However, large-scale comm...

Claims

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Application Information

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IPC IPC(8): H01M10/0562
CPCY02E60/10
Inventor 吕晓娟李静张冯
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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