A kind of silver-silver germanium doped perovskite-type solid electrolyte and preparation method thereof

A solid electrolyte, perovskite-type technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve problems such as being unable to meet actual needs, and the conductivity of grain boundaries is only 10-5S/cm, to overcome Effect of grain boundary instability, performance improvement, and uniformity improvement

Active Publication Date: 2022-07-26
GUANG DONG DONGBOND TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Perovskite-type lithium lanthanum titanium-based (LLTO) oxide solid electrolytes have been reported to have very high crystal conductivity of 1×10-3 S / cm at room temperature, however, the grain boundary conductivity and total conductivity are generally Only at the level of 10-5S / cm, which cannot meet the actual needs

Method used

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  • A kind of silver-silver germanium doped perovskite-type solid electrolyte and preparation method thereof
  • A kind of silver-silver germanium doped perovskite-type solid electrolyte and preparation method thereof
  • A kind of silver-silver germanium doped perovskite-type solid electrolyte and preparation method thereof

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preparation example Construction

[0036] The embodiment of the second aspect of the present invention provides a preparation method of arginite-doped perovskite-type solid electrolyte material, comprising the following steps:

[0037] (1) According to the chemical formula Li0.33La0.57(Ti(1-x), Ag9GeSe6-x-y Tey)O 3 , 0≤x≤0.1, 0≤y≤0.75 and x, y are not 0 at the same time, respectively weigh lithium hydroxide monohydrate, lanthanum oxide, titanium dioxide, Ag element, Ge element, Se element, Te element in proportion as ingredients;

[0038] (2) ball milling is carried out after the ingredients are mixed;

[0039] (3) pre-sintering the powder obtained by ball milling to obtain a precursor with a crystal structure;

[0040] (4) carrying out the second ball milling to the pre-sintered precursor to obtain fine particles, and pressing the particles into tablets;

[0041] (5) degumming the tablet;

[0042] (6) sintering the pressed sheet after debinding to obtain the perovskite-type solid electrolyte material doped...

Embodiment 1

[0061] Example 1 (doping with arginite):

[0062] According to the chemical formula Li0.33La0.57(Ti(1-x), Ag9GeSe6-x-y Tey)O 3 (0≤x≤0.1, 0≤y≤0.75 and x, y are not 0 at the same time) (where x=0.02, y=0.5) The molar ratios were weighed respectively lithium hydroxide monohydrate, lanthanum oxide, titanium dioxide, Ag element, Ge elemental substance, Se elemental substance, Te elemental compound are prepared and vacuum-packed. Using absolute ethanol as a medium, the mixture was added to a ball milling jar for ball milling for 6-12 hours, and the ball-milled slurry was dried and then put into a crucible for calcination at 1100° C. for 6-12 hours. After the pre-sintering is completed, the obtained powder is subjected to secondary ball milling for 6-12 hours, then the powder after secondary ball milling is dried and placed in a mortar, 6% polyvinyl alcohol is added, and fine particles are obtained by fully grinding. The good granules were placed on a tableting machine for tabletin...

Embodiment 2

[0063] Example 2 (doping with arginite):

[0064] According to the chemical formula Li0.33La0.57(Ti(1-x), Ag9GeSe6-x-y Tey)O 3 (0≤x≤0.1, 0≤y≤0.75 and x, y are not 0 at the same time) (where x=0.04, y=0.5) The molar ratios were weighed respectively lithium hydroxide monohydrate, lanthanum oxide, titanium dioxide, Ag element, Ge elemental substance, Se elemental substance, Te elemental compound are prepared and vacuum-packed. Using absolute ethanol as a medium, the mixture was added to a ball milling jar for ball milling for 6-12 hours, and the ball-milled slurry was dried and then put into a crucible for calcination at 1100° C. for 6-12 hours. After the pre-sintering is completed, the obtained powder is subjected to secondary ball milling for 6-12 hours, then the powder after secondary ball milling is dried and placed in a mortar, 6% polyvinyl alcohol is added, and fine particles are obtained by fully grinding. The good granules were placed on a tableting machine for tabletin...

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Abstract

A perovskite-type solid electrolyte doped with silver-germanium ore and a preparation method thereof. The chemical formula of the electrolyte material is Li0.33La0.57(Ti(1‑x), Ag9GeSe6‑x‑yTey)O 3 , where 0≤x≤0.1, 0≤y≤0.75 and x, y are different from 0. The preparation method includes: weighing the ingredients according to the chemical formula; mixing the ingredients and then performing ball milling; pre-sintering the powder obtained by the ball-milling to obtain a precursor with a crystal structure; Ball milling to obtain fine particles, and pressing the particles into tablets; performing debinding treatment on the tablets; and sintering the tablets after debinding to obtain the perovskite-doped perovskite solid electrolyte material. The invention can improve the electrical conductivity of the solid electrolyte and improve the performance of the power battery and the electric energy storage battery using the all-solid electrolyte.

Description

technical field [0001] The invention relates to the field of inorganic solid electrolytes for lithium ion batteries, in particular to a perovskite-type solid electrolyte doped with silver-germanium ore and a preparation method thereof. Background technique [0002] Over the years, lithium batteries have been more and more widely used in our daily life, such as in mobile phones, notebook computers and other portable electronic devices. Lithium batteries have become a promising new energy storage device. As an important part of lithium batteries, electrolytes play an important role in them. In the practical application of lithium batteries, electrolytes made of liquid and organic materials have leaked due to extrusion and deformation, and unsafe problems such as flammability and explosion due to sparks have occurred. [0003] All-solid-state lithium-ion battery is one of the lithium-ion battery systems proposed to solve the problem of poor safety performance of liquid-electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0562H01M10/058H01M10/0525H01M10/42
CPCH01M10/0562H01M10/058H01M10/0525H01M10/4235Y02P70/50
Inventor 刘萍
Owner GUANG DONG DONGBOND TECH CO LTD
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