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Solid state lithium battery and preparation method thereof

A technology of solid lithium and solid electrolyte, which is applied in the field of solid lithium battery and its preparation, and can solve the problems of interface incompatibility, poor matching of solid electrolyte, and low specific energy of positive electrode materials.

Active Publication Date: 2021-12-10
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a solid-state lithium battery, aiming to solve the technical problems of the existing solid-state lithium battery cathode materials such as low specific energy, poor compatibility with solid-state electrolytes, and interface incompatibility.

Method used

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  • Solid state lithium battery and preparation method thereof
  • Solid state lithium battery and preparation method thereof
  • Solid state lithium battery and preparation method thereof

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preparation example Construction

[0043] The embodiment of the present invention also provides a preparation method of a solid-state lithium battery, comprising the steps of:

[0044] S10. Obtain a transition metal oxide with a particle size of 100 nanometers to 1 micron, prepare the transition metal oxide, positive electrode conductor and positive electrode binder into a positive electrode slurry, and deposit the positive electrode slurry on the positive electrode current collector On, get the positive pole;

[0045] S20. Obtain the negative electrode and the solid electrolyte, and make the positive electrode, the negative electrode and the solid electrolyte into a solid lithium battery.

[0046] The preparation method of the solid-state lithium battery provided by the embodiment of the present invention comprises the steps of: preparing a positive electrode slurry from a transition metal oxide with a particle size of 100 nanometers to 1 micron, a positive electrode conductive agent, and a positive electrode ...

Embodiment 1

[0053] A solid-state lithium battery, comprising the following preparation steps:

[0054] ① Obtain Fe with a particle size of 500 nm 2 o 3 , the Fe 2 o 3 Making positive electrode slurry with conductive carbon black and polyacrylic acid, coating the positive electrode slurry on the positive electrode current collector to obtain the positive electrode;

[0055] ②A lithium metal negative electrode and a lithium lanthanum zirconium tantalum oxygen solid electrolyte are obtained, and the positive electrode, the negative electrode and the solid electrolyte are made into a solid lithium battery.

Embodiment 2

[0057] A solid-state lithium battery, comprising the following preparation steps:

[0058] ① Obtain Fe with a particle size of about 500 nanometers 2 o 3 , the Fe 2 o 3 Making positive electrode slurry with conductive carbon black and polyacrylic acid, coating the positive electrode slurry on the positive electrode current collector to obtain the positive electrode;

[0059] ②A lithium metal negative electrode and a lithium aluminum germanium phosphorus solid electrolyte are obtained, and the positive electrode, the negative electrode and the solid electrolyte are made into a solid lithium battery.

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Abstract

The invention belongs to the technical field of batteries, and in particular relates to a solid-state lithium battery, comprising: a positive electrode, a negative electrode and a solid electrolyte, wherein the positive electrode includes a positive electrode active material, and the positive electrode active material includes a transition electrode with a particle size of 100 nanometers to 1 micron. Metal oxide. The positive electrode active material in the solid lithium battery of the present invention adopts a transition metal oxide with a particle size of 100 nanometers to 1 micron, has a high reversible specific capacity and a high potential platform, the reversible specific capacity is greater than 674mAh / g, and the specific energy is greater than 1014Wh / kg, and can match stable cycles with different types of solid electrolytes.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a solid-state lithium battery and a preparation method thereof. Background technique [0002] In the current chemical battery system, lithium batteries are considered to be the most promising energy storage devices due to their high energy density, long cycle life, and no memory effect. Traditional lithium-ion batteries use electrolytes that are generally organic liquid electrolytes. Although liquid electrolytes can provide high ionic conductivity and good interface contact, organic liquid electrolytes have low lithium ion migration numbers, are prone to leakage, are volatile, and are easily The further development of lithium batteries has been hindered by problems such as flammability and poor safety. In view of the pursuit of higher energy density and higher safety, lithium-ion batteries have gradually entered the development trend of transitioning from tradition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/052H01M4/48H01M4/50H01M4/52H01M10/058
CPCH01M10/052H01M4/483H01M4/502H01M4/523H01M10/058H01M2004/021H01M2004/028Y02E60/10Y02P70/50
Inventor 邓永红吴唯王曼张田王军魏振耀
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA