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

Composite lithium membrane and lithium ion battery pole piece of diaphragm and preparation method thereof

A lithium-ion battery and lithium-composite technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve problems such as difficulty in engineering realization, complicated manufacturing process, and impact on energy density, and achieve improved winding Efficiency, reduced capacity loss, and improved safety

Inactive Publication Date: 2018-03-27
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the efficiency of the first battery made of this material as the negative electrode is low, which affects the improvement of energy density.
[0003] The current idea is to supplement lithium elements on the surface of the negative electrode, and the SEI film can be formed as a lithium source when the battery is charged for the first time, so that the lithium ions in the positive electrode are completely used for reversible deintercalation reactions, improving the first efficiency and energy density, but Its lithium is an extremely active metal, and it will burn and explode when it meets water, which poses a great safety hazard, the manufacturing process is complicated, and it is difficult to realize engineering

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
  • Composite lithium membrane and lithium ion battery pole piece of diaphragm and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Such as figure 1 as shown, figure 1 It is a structural schematic diagram of a lithium-ion battery pole piece of a composite lithium membrane and diaphragm proposed by the present invention.

[0025] refer to figure 1 , a lithium-ion battery pole piece of a composite lithium film and diaphragm proposed by the present invention, comprising: a pole piece substrate 1, a first lithium film 2, a second lithium film 3, a first diaphragm 4, and a second diaphragm 5;

[0026] The first lithium film 2 and the second lithium film 3 are respectively covered on both sides of the pole piece substrate 1, the first diaphragm 4 is located on the side of the first lithium film 2 away from the pole piece substrate 1 and covers the first lithium film 2, and the second The diaphragm 5 is located on the side of the second lithium film 3 away from the pole piece base 1 and covers the second lithium film 3 .

[0027] In this example, the lithium-ion battery pole piece of the proposed compos...

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
Login to View More

Abstract

The invention discloses a composite lithium membrane and a lithium ion battery pole piece of a diaphragm. By compositing the lithium membrane at two sides of the battery pole piece, first efficiency of the battery pole piece after the battery is produced is increased, irreversible capacity in the battery is decreased, energy density is increased; at the same time, the diaphragm is composited at outside of the lithium membrane, influence of environment on the lithium membrane can be effectively protected, and safety is greatly increased. The invention also provides a method for preparing the composite lithium membrane and the lithium ion battery pole piece of the diaphragm, by prefabricating a lithium membrane composite sheet, security during production is guaranteed, through a stitching mechanism, a lithium membrane lamination step is realized during a winding process of the battery pole piece, winding difficulty is greatly reduced, and the winding efficiency is enhanced.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a lithium-ion battery pole piece with a composite lithium film and diaphragm and a preparation method thereof. Background technique [0002] With the explosive development of the new energy automobile industry, the demand for lithium-ion batteries is growing rapidly. According to the national plan for power batteries in 2020, by 2020, the energy density of a single power battery must reach 300Wh / Kg. To achieve this energy density, it is generally believed that silicon or silicon-carbon composite materials should be used as the negative electrode. However, the first-time efficiency of batteries made of this material as the negative electrode is low, which affects the improvement of energy density. [0003] The current idea is to supplement lithium elements on the surface of the negative electrode, and the SEI film can be formed as a lithium source when the battery i...

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): H01M2/14H01M4/13H01M4/139H01M10/0525H01M50/40H01M50/403
CPCH01M4/13H01M4/139H01M10/0525H01M50/40Y02E60/10
Inventor 许涛杨立铭陈萍彭文
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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