Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Battery core and fabrication method thereof

一种电芯、层叠方向的技术，应用在电芯及其制备领域，能够解决锂离子电导率小、锂离子电池倍率性能差等问题，达到层叠结构设置简单、改善电化学性能和安全性能、便于大规模生产的效果

Active Publication Date: 2016-01-06
NINGDE AMPEREX TECH
View PDF10 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inorganic solid electrolyte membrane prepared by this method has good machinability, but due to the lithium ion insulation of Teflon and the inability of good contact between the inorganic electrolyte particles in the inorganic solid electrolyte membrane prepared by this method, the prepared inorganic solid electrolyte The lithium-ion conductivity of the electrolyte membrane is relatively small, and the rate performance of the lithium-ion battery assembled with it is also poor

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
  • Battery core and fabrication method thereof
  • Battery core and fabrication method thereof
  • Battery core and fabrication method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0072] refer to Figure 1-14 , according to the preparation method of the electric core of the second aspect of the present invention, for preparing the electric core according to the first aspect of the present invention, comprising the steps of: providing a positive electrode sheet 1; providing a negative electrode sheet 2; preparing a composite solid electrolyte membrane 3: by Alternately depositing inorganic solid electrolyte layers 31 and structural support layers 32 on a substrate (not shown) along the lamination direction D to prepare a composite solid electrolyte material with a sequentially staggered lamination structure, and separate the composite solid electrolyte material from the substrate to obtain A composite solid electrolyte membrane 3, wherein the composite solid electrolyte membrane 3 includes an inorganic solid electrolyte layer 31 and a structural support layer 32 that are sequentially stacked along the stacking direction D; to prepare a cell: the composite...

Embodiment 1

[0085] (1) Provide positive electrode sheet

[0086] The active material lithium cobaltate (LiCoO 2 ), the binder polyvinylidene fluoride (PVDF), and the conductive agent conductive carbon are added to the solvent N-methylpyrrolidone (NMP) in a mass ratio of 95:3:2 and mixed evenly to make a positive electrode slurry, wherein the solid of the positive electrode slurry The content is 40%, and then the positive electrode slurry is evenly coated on both sides of the 12 μm thick aluminum foil of the current collector, and then compacted with a roller press, and then cold pressed, sliced, and welded to obtain the positive electrode sheet.

[0087] (2) Provide negative electrode sheet

[0088] Active material artificial graphite, thickener sodium carboxymethyl cellulose, conductive agent conductive carbon, and binder styrene-butadiene latex are added to solvent deionized water in a mass ratio of 95:1.5:1.5:2 and mixed evenly to make negative electrode slurry. The solid content of ...

Embodiment 2

[0094] (1) Provide positive electrode sheet

[0095] With embodiment 1.

[0096] (2) Provide negative electrode sheet

[0097] With embodiment 1.

[0098] (3) Preparation of composite solid electrolyte membrane

[0099] At 120°C, 1×10 -2 A polymer electrolyte containing polyethylene oxide (PEO, with a weight average molecular weight of 600,000) and LiTFSI (the weight ratio of PEO to LiTFSI is 3:1) was evaporated on the substrate aluminum foil at a high vacuum of 1 μm under Pa as the first step. layer; followed by the inorganic solid electrolyte Li 2 S(75%)-P 2 S 5 (25%) and the above polymer electrolyte at 300°C, 1×10 -3 Pa and 120°C, 1×10 -2 Under Pa, it is vacuum-evaporated on the above-mentioned aluminum foil coated with a polymer electrolyte at a height of 1 μm and 0.01 μm in sequence, wherein, during the alternate deposition process, the number of layers of the inorganic solid electrolyte layer 31 is 1 more than the number of layers of the structural support layer...

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
weight-average molecular weightaaaaaaaaaa
weight-average molecular weightaaaaaaaaaa
weight-average molecular weightaaaaaaaaaa
Login to View More

Abstract

The invention provides a battery core and a fabrication method thereof. The battery core comprises a positive plate (1), a negative plate (2) and a composite solid electrolyte membrane (3), wherein the composite solid electrolyte membrane (3) is arranged between the positive plate (1) and the negative plate (2), comprises inorganic solid electrolyte layers (31) and structural support layers (32) which are sequentially stacked in a staggered manner along a lamination direction D, and also is provided with binding surfaces (S1) respectively bound with the positive plate (1) and the negative plate (2), an included angle between the lamination direction (D) and the binding surfaces (S1) is Alpha, and the Alpha is more than or equal to 0 degree and less than 90 degrees. The composite solid electrolyte membrane in the battery core can develop the advantages of high lithium-ion conductivity of the inorganic solid electrolyte and simultaneously has favorable machining property, and thus, the electrochemical performance and the safety performance of the battery core are greatly improved.

Description

technical field [0001] The invention relates to the field of electrochemical devices, in particular to an electric core and a preparation method thereof. Background technique [0002] Due to its high energy density, lithium-ion batteries have been widely used in consumer electronics, electric vehicles, and energy storage power stations. Traditional lithium-ion batteries use liquid electrolytes, and their high lithium-ion conductivity facilitates the transport of lithium ions between the positive and negative electrodes. However, due to the volatility and flammability of non-aqueous organic solvents in liquid electrolytes, they have become a key factor affecting the safety performance of lithium-ion batteries. [0003] In order to solve the safety problem of lithium-ion batteries, a series of solid-state electrolytes have been developed one after another. These solid electrolytes include polymer solid electrolytes and inorganic solid electrolytes. Polymer solid electrolyte...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/058
CPCH01M10/052H01M10/056H01M10/0562H01M10/0565H01M10/058H01M2300/0068H01M2300/0082Y02E60/10Y10T29/49114Y02P70/50
Inventor 洪响张介威钟开富
Owner NINGDE AMPEREX TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com