Lithium metal negative electrode for secondary battery, preparation method and application of lithium metal negative electrode

A secondary battery and metal lithium technology, which is applied in secondary batteries, electrode manufacturing, battery electrodes, etc., can solve problems such as poor stability, and achieve the effects of preventing clogging, high specific surface characteristics, and preventing lithium dendrite growth

Active Publication Date: 2018-04-13
CENT SOUTH UNIV
View PDF10 Cites 37 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problems existing in the three-dimensional porous lithium negative electrode, especially the technical problem of poor st

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
  • Lithium metal negative electrode for secondary battery, preparation method and application of lithium metal negative electrode
  • Lithium metal negative electrode for secondary battery, preparation method and application of lithium metal negative electrode
  • Lithium metal negative electrode for secondary battery, preparation method and application of lithium metal negative electrode

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1

[0040] Sputter a layer of nano-Au particles as a lithium deposition induction layer on the bottom of the Ni foam collector (any plane) by ion sputtering (using a gold plate as a target, sputtering for 200s at a current of 20 mA) , The thickness of the nano Au particle layer is about 10 nm. Li was deposited in Au modified porous nickel by electrodeposition in a glove box to prepare a porous lithium negative electrode (Au / Ni foam). The SEM image of the prepared porous lithium anode is shown in figure 1 Part (a); see the EDS diagram figure 1 Part (b).

[0041] Using lithium metal as the positive electrode, 1M LiTFSI / DOL: DME (volume ratio = 1:1) contains 1%wtLiNO 3 As the electrolyte, it is assembled with the lithium negative electrode prepared by the present invention to form a 2032 button lithium ion battery (press figure 2 The method is assembled, that is, the surface where the Au particles are sputtered is set at the far end of the diaphragm), the diaphragm us...

Example Embodiment

[0044] Example 2

[0045] A layer of nano-ZnO particles are grown on the bottom of the carbon paper (CP) current collector as a lithium deposition inducing layer by magnetron sputtering (using zinc oxide as the target material, sputtering for 15 seconds under 80W sputtering power), nano-ZnO The thickness of the layer is 5 nm. A 2025 button lithium-ion battery was assembled in a glove box with Celgard 2400 as a separator. Li was deposited on a ZnO-modified carbon paper current collector by electrodeposition to prepare a porous ZnO / C lithium negative electrode. Take the carbon paper lithium negative electrode with the same structure without coating the lithium deposition induction layer as a comparison sample (see the morphology and energy spectrum Figure 5 ). The test found that the ZnO / C lithium negative electrode with lithium deposition trap layer of the present invention is at 1mA / cm 2 The cycle life under charge and discharge current density is 5 times that of ordinary carbo...

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 discloses a lithium metal negative electrode for a secondary battery. The lithium metal negative electrode comprises a three-dimensional porous current collector, a lithium metal activesubstance dispersed into pores of the current collector, and a lithium deposition induction layer compounded on any plane of the current collector. Furthermore, the invention further discloses a preparation method and application of the negative electrode, and a lithium-ion secondary battery obtained through assembly of the negative electrode. The lithium metal negative electrode has the unique advantage that the lithium deposition induction layer is deposited on one plane of the current collector, so that unexpected improvement of the stability, especially the stability at high current density (for example, 3-5mA/cm<2>), of the negative electrode is facilitated. According to the method, the problems of pore plugging and lithium dendrite growth caused by preferential deposition of lithiumon the surface of the electrode in the three-dimensional porous lithium negative electrode are effectively solved, the charge-discharge coulomb efficiency of a lithium positive electrode is improved and the cycle life of the lithium positive electrode is prolonged.

Description

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

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
Owner CENT SOUTH 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.

© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap