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Argyrodite-doped perovskite solid electrolyte and preparation method thereof

A solid electrolyte and perovskite-type technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve the problem that the conductivity of the grain boundary is only 10-5S/cm, which cannot meet the actual needs, and achieve an improvement Migration performance, accelerated degradation of grain boundaries, and performance improvement effects

Active Publication Date: 2020-05-08
GUANG DONG DONGBOND TECH CO LTD
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  • 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

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  • Argyrodite-doped perovskite solid electrolyte and preparation method thereof
  • Argyrodite-doped perovskite solid electrolyte and preparation method thereof
  • Argyrodite-doped perovskite 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 method for preparing argentite-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, simple substance of Ag, simple substance of Ge, simple substance of Se, and simple substance of Te in proportion, as Ingredients;

[0038] (2) carry out ball milling after described batching is mixed;

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

[0040] (4) Carry out the second ball milling on the pre-calcined precursor to obtain fine particles, and press the particles into tablets;

[0041] (5) Carry out deglue processing to compressed tablet;

[0042] (6) Sintering the pressed tablet after...

Embodiment 1

[0061] Embodiment 1 (argentite doping is arranged):

[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) (wherein x=0.02, y=0.5) molar ratio Weigh lithium hydroxide monohydrate, lanthanum oxide, titanium dioxide, Ag simple substance, Ge simple substance, Se simple substance, and Te simple substance are prepared into a mixture and then vacuum-packed. Using absolute ethanol as a medium, put the mixture into a ball mill jar and mill it for 6-12 hours, dry the milled slurry, put it into a crucible, and calcinate it at 1100°C for 6-12 hours. After the pre-burning is completed, the obtained powder is subjected to secondary ball milling for 6-12 hours, and then the powder after the secondary ball milling is dried and placed in a mortar, 6% polyvinyl alcohol is added, and fine particles are fully ground to obtain fine particles. The good granules are placed on a tablet press to be pressed into t...

Embodiment 2

[0063] Embodiment 2 (argentite doping is arranged):

[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) (wherein x=0.04, y=0.5) molar ratio Weigh lithium hydroxide monohydrate, lanthanum oxide, titanium dioxide, Ag simple substance, Ge simple substance, Se simple substance, and Te simple substance are prepared into a mixture and then vacuum-packed. Using absolute ethanol as a medium, put the mixture into a ball mill jar and mill it for 6-12 hours, dry the milled slurry, put it into a crucible, and calcinate it at 1100°C for 6-12 hours. After the pre-burning is completed, the obtained powder is subjected to secondary ball milling for 6-12 hours, and then the powder after the secondary ball milling is dried and placed in a mortar, 6% polyvinyl alcohol is added, and fine particles are fully ground to obtain fine particles. The good granules are placed on a tablet press to be pressed into t...

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Abstract

The invention discloses argyrodite-doped perovskite solid electrolyte and a preparation method thereof. The chemical formula of the electrolyte material is Li<0.33>La<0.57>(Ti(1-x), Ag9GeSe<6-x-y>Te<y>)O<3>, wherein x is greater than or equal to 0 and less than or equal to 0.1, y is greater than or equal to 0 and less than or equal to 0.75, and x and y are different and are 0. The preparation method comprises the following steps: proportionally weighing ingredients according to the chemical formula; performing mixing and ball-milling of the ingredients; presintering the powder obtained by ballmilling to obtain a precursor with a crystal structure; carrying out secondary ball milling on the precursor obtained by presintering to obtain fine particles, and pressing the particles into sheets;carrying out rubber discharging treatment on the pressing sheet; and sintering the pressed sheet after rubber discharging to obtain the argyrodite doped perovskite type solid electrolyte material. The conductivity of the solid electrolyte can be improved, and the performance of a power battery and an electric energy storage battery using the all-solid-state electrolyte is improved.

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 argentite 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 it. In the actual application process of lithium batteries, electrolytes made of liquid and organic matter may leak when they are squeezed and deformed, and unsafe problems such as flammability and explosion when encountering sparks occur from time to time. [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 liqu...

Claims

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Application Information

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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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