All-solid-state lithium-ion battery and manufacturing method thereof

A technology of lithium-ion batteries and manufacturing methods, applied in the field of all-solid-state lithium-ion batteries and their manufacture, capable of solving problems such as poor cycle performance and high DC internal resistance of batteries, achieving low DC resistance, improving ion conductivity, and good cycle performance Effect

Inactive Publication Date: 2017-03-22
SHANGHAI AEROSPACE POWER TECH
View PDF6 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also some disadvantages in the application of sulfide solid electrolytes. At the electrode/solid electrolyte interface, since the force between oxygen-lithium ions is much stronger than the force between sulfur-lithium ions, when the oxide positive electrode has both ionic conductivity and When an electronically conductive mixed conductor is used, a space charge layer will be generated at the electrode/electrolyte interface, thereby forming a base-type space charge layer, so that the interface between the electrode/solid electrolyte f

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 lithium-ion battery and manufacturing method thereof
  • All-solid-state lithium-ion battery and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Embodiment 1:

[0021] (1) Glue preparation: According to the mass ratio of 1:9, the PEO-based polymer electrolyte was dissolved in NMP solvent, and stirred at 20 °C for 3 hours to prepare a glue solution.

[0022] (2) Cathode pulping: Lithium iron phosphate, Super-P and KS-6 were fully mixed with the glue solution of the previous step at 20 °C for 4 h using double planetary stirring. The mass percentage of each component is: lithium iron phosphate 70%, Super-P 3%, KS-6 3%, glue 24%.

[0023] (3) Negative electrode pulping: The artificial graphite and Super-P were fully mixed with the glue solution of the previous step at 20 °C for 4 h using double planetary stirring. The mass percentage of each component is: artificial graphite 65%, Super-P 5%, glue 30%.

[0024] (4) Polymer electrolyte curing: After coating the positive and negative electrodes, the polymer electrolyte was cured at 90°C for 8 hours.

[0025] (5) Sulfide electrolyte coating: use a planetary mechanica...

Example Embodiment

[0027] Embodiment 2:

[0028] (1) Glue preparation: According to the mass ratio of 1:10, the PMMA-based polymer electrolyte was dissolved in NMP solvent, and stirred at 20 °C for 3 hours to prepare a glue solution.

[0029] (2) Cathode pulping: Lithium cobaltate, Super-P and KS-6 were fully mixed with the glue solution of the previous step at 20 °C for 4 h using double planetary stirring. The mass percentage of each component is: lithium cobalt oxide 70%, Super-P 2.5%, KS-6 2.5%, glue 25%.

[0030] (3) Negative electrode pulping: The artificial graphite and vapor-grown carbon fiber were fully mixed with the glue solution of the previous step at 20°C for 4h by double planetary stirring. The mass percentage of each component is: 66% of artificial graphite, 4% of vapor-grown carbon fiber, and 30% of glue.

[0031] (4) Polymer electrolyte curing: After the positive and negative electrodes are coated, the polymer electrolyte is cured at 80°C for 10 hours.

[0032] (5) Sulfide el...

Example Embodiment

[0034] Embodiment 3:

[0035] (1) Glue preparation: According to the mass ratio of 1:9, the PVDF polymer electrolyte was dissolved in NMP solvent, and stirred at 20 °C for 3 hours to prepare a glue solution.

[0036] (2) Cathode pulping: Lithium manganate, Super-P and KS-6 were fully mixed with the glue solution from the previous step at 20°C for 3.5h using double planetary stirring. The mass percentage of each component is: lithium manganate 70%, Super-P 2.5%, KS-6 2.5%, glue 25%.

[0037] (3) Negative electrode pulping: Hard carbon, graphene and Super-P were fully mixed with the glue solution of the previous step at 20 °C for 3.5 h using double planetary stirring. The mass percentage of each component is: hard carbon 60%, graphene 2%, Super-P 3%, glue 35%.

[0038] (4) Polymer electrolyte curing: After coating the positive and negative electrodes, the polymer electrolyte was cured at 85°C for 8 hours.

[0039] (5) Sulfide electrolyte coating: use a planetary mechanical ball...

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

No PUM Login to view more

Abstract

The invention discloses an all-solid-state lithium-ion battery and a manufacturing method thereof. The manufacturing method comprises the following steps of (1) dissolving a polymer electrolyte into a solvent to prepare a glue solution; (2) fully mixing a positive electrode host material, a conductive agent and the glue solution obtained in the step (1), coating a positive current collector, heating the positive current collector and then carrying out co-curing to obtain a positive electrode plate, fully mixing a negative electrode host material, the conductive agent and the glue solution obtained in the step (1), coating a negative current collector, heating the negative current collector and then carrying out co-curing to obtain a negative electrode roll; (3) carrying out mechanical ball milling on a sulfide electrolyte, dissolving the product into the solvent to prepare slurry, coating the surface of the negative electrode roll, heating the negative electrode roll and then curing the negative electrode roll to obtain a negative electrode plate; and (4) assembling the positive electrode plate and the negative electrode plate by adopting a lamination technology to obtain the all-solid-state lithium-ion battery. Compared with the prior art, the all-solid-state lithium-ion battery disclosed by the invention has relatively low DC resistance, relatively high ionic conductivity and good cycle performance.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to an all-solid lithium ion battery and a manufacturing method thereof. Background technique [0002] Lithium-ion batteries are regarded as one of the most competitive electrochemical energy storage technologies due to their light weight, high specific energy / specific power, low self-discharge, and long life. Current commercial lithium-ion batteries widely use liquid electrolytes, which are characterized by high electrical conductivity and excellent electrochemical performance. However, the liquid electrolyte has a low flash point, which may cause the electrolyte to heat up and spontaneously ignite under abnormal conditions such as high-current discharge, overcharging, and internal short circuit, and even cause safety problems such as explosion. An all-solid-state battery using a solid-state electrolyte greatly improves safety, simplifies battery safety devices, and...

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): H01M10/0525H01M10/058H01M10/0565
CPCH01M10/0525H01M10/0565H01M10/058Y02E60/10Y02P70/50
Inventor 冯吴亮刘婵侯敏曹辉王东
Owner SHANGHAI AEROSPACE POWER TECH
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