All-solid-state battery

A technology of all-solid-state batteries and solid-state electrolytes, which can be used in secondary batteries, secondary battery repair/maintenance, circuits, etc., and can solve the problems of slowing down the migration speed of lithium ions, limiting the performance of lithium-ion batteries, and limiting the development of all-solid-state lithium batteries, etc. , to achieve the effect of improving the magnification characteristics and cycle performance, improving the battery life, and improving the bonding quality

Pending Publication Date: 2022-01-28
SHENZHEN UNIV
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor interface between electrodes and solid-state electrolytes limits the development of all-solid-state lithium batteries
Different from traditional batteries using electrolyte, the electrolyte can be well infiltrated between the electrodes, so that lithium ions can migrate freely and quickly. In all-solid-state lithium-ion batteries, the solid electrolyte and electrodes will be physically combined due to the interface. Due to various reasons such as quality (pores, cracks, etc.), lattice mismatch, and differences in thermal expansion coefficients, the migration speed of lithium ions at the interface between the electrode and the electrolyte is greatly reduced, forming lithium elements to gather at the interface, which limits the performance of lithium-ion batteries. performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • All-solid-state battery
  • All-solid-state battery
  • All-solid-state battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] The embodiment of the present application also provides a method for preparing the above-mentioned all-solid-state battery, including the following steps:

[0039] A positive current collector layer, a positive material layer, an intermediate layer, a solid electrolyte layer, a negative material layer and a negative current collector layer are sequentially prepared on the substrate by using a magnetron sputtering method.

[0040] Wherein, the substrate may be a silicon substrate polished on one side, a mica with a smooth surface, stainless steel, a polyimide (PI) substrate, and the like. The surface cleanliness of the substrate will affect the adhesion effect and growth quality of the film on the substrate. The substrate can be cleaned before depositing the battery functional layer. The cleaning operation can be performed by ultrasonically cleaning the substrate with alcohol and acetone for 3-5 minutes. Then use high-purity nitrogen to blow off residual impurities or cl...

Embodiment 1

[0054] (1) Use alcohol and acetone to ultrasonically clean the silicon substrate polished on one side for 3-5 minutes, and then use high-purity nitrogen to blow off residual impurities or cleaning agents on the substrate surface.

[0055] (2) The Ag target of the current collector, the electrode target (NCM positive electrode, LTO negative electrode) and the electrolyte target (LiLaTiO 3 ) and the substrate were placed in the magnetron sputtering chamber. Background vacuum -4 Pa, the metal current collector was prepared by DC magnetron sputtering, and the intermediate layer, electrode and solid electrolyte layer were prepared by radio frequency magnetron sputtering. The preparation steps are as follows:

[0056] 2a. Introduce a pure Ar atmosphere, the air pressure is 0.3Pa, and prepare a positive current collector layer on the silicon substrate with a power of 70W, with a thickness of 300nm;

[0057] 2b. Introduce 0.5Pa of Ar-O 2 Mixed gas, argon-oxygen ratio Ar 2 :O 2 Th...

Embodiment 2

[0064] (1) Use alcohol and acetone to ultrasonically clean the silicon substrate polished on one side for 3-5 minutes, and then use high-purity nitrogen to blow off residual impurities or cleaning agents on the substrate surface.

[0065] (2) The Ag target of the current collector, the electrode target (NCM positive electrode) and the electrolyte target (LiLaTiO 3 ) and the substrate were placed in the magnetron sputtering chamber. Background vacuum -4 Pa, the metal current collector was prepared by DC magnetron sputtering, and the intermediate layer, electrode and solid electrolyte layer were prepared by radio frequency magnetron sputtering. The preparation steps are as follows:

[0066] 2a. Introduce a pure Ar atmosphere, the air pressure is 0.3Pa, and a positive electrode current collector film is prepared on the silicon substrate with a power of 70W, with a thickness of 300nm;

[0067] 2b. Introduce 0.5Pa of Ar-O 2 Mixed gas, argon-oxygen ratio Ar 2 :O 2 The ratio is ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention provides an all-solid-state battery. The battery comprises a positive electrode layer, a negative electrode layer, a solid electrolyte layer located between the positive electrode layer and the negative electrode layer and a middle layer located between the positive electrode layer and the solid electrolyte layer, the middle layer comprises a silicon dioxide layer or comprises a first layer and a second layer which are alternately stacked, the first layer comprises a first electrolyte material, and the second layer includes a first positive electrode material. According to the all-solid-state battery, the intermediate layer is introduced between the electrode and the solid-state electrolyte, so that the migration speed of lithium ions at the interface of the electrode and the solid-state electrolyte is greatly increased, and the rate characteristic and the cycle performance of the battery are improved. The embodiment of the invention also provides electronic equipment comprising the all-solid-state battery and a vehicle.

Description

technical field [0001] The embodiments of the present application relate to the technical field of solid-state batteries, in particular to an all-solid-state battery. Background technique [0002] All-solid-state lithium batteries have extremely high safety. Their solid-state electrolytes are non-flammable, non-corrosive, non-volatile, and non-leakage. At the same time, they also overcome the phenomenon of lithium dendrites. The probability of spontaneous combustion of cars equipped with all-solid-state lithium batteries will be greatly reduced. In addition, when solid-state batteries are used in small devices such as mobile phones, watches or even smaller devices, the use of solid electrolytes instead of liquid electrolytes simplifies the need for packaging, and thinner solid electrolytes also have It is beneficial to improve the volume energy density and mass energy density of the battery, and helps to realize the flexibility of the energy unit. However, the poor interfac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M10/0562H01M10/0525H01M10/42
CPCH01M10/0525H01M10/0562H01M10/4235H01M2300/0085Y02E60/10
Inventor 彭争春谭飞虎
Owner SHENZHEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap