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

Lithium secondary battery negative electrode material components and method of its manufacture

A technology for lithium secondary batteries and constituent materials, which is applied in the manufacture of electrodes, secondary batteries, electrolyte storage batteries, etc., and can solve problems such as battery rupture and battery short circuit

Inactive Publication Date: 2006-02-22
SUMITOMO ELECTRIC IND LTD
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At the same time, as a technology, the use of metallic lithium in the negative electrode was attempted to achieve an increase in the capacity of lithium secondary batteries, but due to the reaction of metallic lithium with the organic electrolyte contained in the battery during charge / discharge, lithium dendrites appeared on the negative electrode. The growth of the battery causes a short circuit between the inside of the battery and the positive electrode, and there is a danger that the battery will eventually end in rupture

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Manufacturing Example 1—Depositing a Solid Electrolyte Membrane

[0051] An inorganic solid electrolyte film of a lithium (Li)-phosphorus (P)-sulfur (S)-oxygen (O) composition was formed on a glass substrate using a laser ablation method by the procedure set forth below.

[0052] Lithium sulfide (Li 2 S), phosphorus pentasulfide (P 2 S 5 ), and phosphorus pentoxide (P 2 o 5 ) are mixed together in a glove box filled with argon gas with a dew point of -80° C.; and the powder mixture is put into a mold for compression to prepare a spherical object.

[0053] Transfer the above target object from the glove box to the film-deposition equipment in such a way that the target object cannot be exposed to the air; set up the target object inside the film-deposition equipment and set the focus of the laser beam on the target object On, this source material is vaporized and deposited as a film on a substrate made of glass. The substrate did not heat up appreciably.

[0054] ...

Embodiment 2

[0057] Manufacturing Example 2—Depositing a Solid Electrolyte Membrane

[0058] An inorganic solid-electrolyte film of lithium (Li)-phosphorus (P)-sulfur (S)-oxygen (O) composition was formed on a glass substrate using the laser ablation method by the procedure set forth below.

[0059] Lithium sulfide (Li 2 S), phosphorus pentasulfide (P 2 S 5 ), and phosphorus pentoxide (P 2 o 5 ) were mixed together in a glove box filled with argon gas with a dew point of -80°C; and the powder mixture was put into a mold and compressed to prepare a spherical object.

[0060] The above object is transferred from the inside of the glove box to the film-deposition equipment in such a way that the object cannot be exposed to the air; the object is erected inside the film-deposition equipment and the focus of the laser beam is fixed on the object On, this source material is vaporized and deposited as a film on a substrate made of glass. In this example, argon mixed with oxygen was used as ...

manufacture Embodiment 3

[0065] Manufacturing example 3—deposition of metal lithium film

[0066] A metallic lithium film was formed on the copper foil by the procedure set forth below.

[0067] Fix the copper foil substrate to the bracket attached to the substrate cooling mechanism in the vacuum deposition device. A metal lithium sample used as a source material is placed in a heating chamber of a vacuum deposition device, and the inside of the device is pumped to a vacuum. A very small amount of oxygen is introduced into the heating chamber, and the heating chamber is heated to deposit lithium into a film.

[0068] Oxygen in the film was analyzed in the depth direction by an ESCA-5400MC analyzer of Phi Corporation after deposition, and the result was 52 atomic percent on the surface, but 5 atomic percent at a depth of 0.46 μm. Surface oxygen is generated due to oxidation of the surface of the sample during processing. This oxidized surface layer can be removed by ion bombardment treatment prior t...

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
ionic conductivityaaaaaaaaaa
electrical conductivityaaaaaaaaaa
freezing pointaaaaaaaaaa
Login to View More

Abstract

It is intended to provide a secondary lithium battery in which short circuit caused by the formation of dendrite from the metallic lithium negative electrode is regulated and which has a high energy density, a high stability with excellent charge-discharge cycle properties and a high safety. A negative electrode member for a secondary lithium battery comprising a metallic lithium film and an inorganic solid electrolyte film which are layered on a base material, characterized in that the inorganic solid electrolyte contains lithium, phosphorus, sulfur and oxygen, and is represented by the following compositional formula: aLi.bP.cS.dO (Li: lithium, P: phosphorus, S: sulfur, O: oxygen) and the contents of the elements respectively fall within the following ranges: 0.20<=a<=0.45, 0.10<=b<=0.20, 0.35<=c<=0.60, 0.03<=d<=0.13, (a+b+c+d=1).

Description

technical field [0001] The present invention relates to a constituent material utilizing a high-performance solid electrolyte, which enables high capacity and high safety in a negative electrode of a lithium secondary battery; and to a manufacturing method of the constituent material and the lithium secondary battery itself. Background technique [0002] Lithium-ion-conducting electro-inorganic solid electrolytes having phosphorus as a component are well known; for example, in Japanese Examined Patent Application Publication H05-48582 and in "Ion-conducting Sulfides" by John H. Kennedy and others. Lithium-based glass", the composition of which is Li 2 S-P 2 S 5 Properties of amorphous solid electrolytes. [0003] In addition, among amorphous inorganic solid electrolytes conducting lithium ions, it has been disclosed that the conductivity of lithium ions can be improved by adding oxides to inorganic solid electrolytes whose main components are sulfides, which will also be ...

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): H01M4/48H01M4/02H01M10/40H01M4/04H01M4/131H01M4/139H01M4/1391H01M4/1395H01M4/36H01M4/40H01M4/485H01M4/52H01M4/525H01M10/052H01M10/0562H01M10/058H01M10/36
CPCH01M4/525H01M10/058H01M4/0426H01M10/052H01M4/1391Y10T29/49108H01M4/1395H01M4/366H01M4/485H01M4/139H01M4/0421H01M4/40Y10T29/49115H01M10/0562Y02E60/122H01M4/131Y02E60/10Y02P70/50
Inventor 太田进启奥田伸之植木宏行井原宽彦
Owner SUMITOMO ELECTRIC IND LTD
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