Check patentability & draft patents in minutes with Patsnap Eureka AI!

Negative electrode active material for nonaqueous electrolyte secondary batteries and negative electrode

A negative electrode active material, non-aqueous electrolyte technology, applied in non-aqueous electrolyte battery electrodes, non-aqueous electrolyte batteries, active material electrodes and other directions, can solve the problem of low charging and discharging efficiency, and achieve the effect of inhibiting capacity reduction

Active Publication Date: 2018-05-11
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
View PDF13 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with the case of using graphite as the negative electrode active material, the non-aqueous electrolyte secondary battery using silicon material as the negative electrode active material has the problem of low charge and discharge efficiency

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
  • Negative electrode active material for nonaqueous electrolyte secondary batteries and negative electrode
  • Negative electrode active material for nonaqueous electrolyte secondary batteries and negative electrode
  • Negative electrode active material for nonaqueous electrolyte secondary batteries and negative electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] [Production of negative electrode active material]

[0080] The preparation included equimolar amounts of Si and Li 2 SiO 3 (average primary particle diameter of composite particles: 10 μm, average primary particle diameter of Si: 100 nm). As a result of measuring the amount of Si in the composite particles using ICP (manufactured by SII NanoTechnology Inc., ICP emission spectrometer SPS3100), it was 42 wt%. The average primary particle diameter of the particles is a value measured using a particle size distribution meter (manufactured by Shimadzu Corporation, particle size distribution analyzer SLAD2000). The cross-section of the composite particles was observed by SEM, and it was confirmed that the Si particles in the Li 2 SiO 3 roughly evenly dispersed in the phase.

[0081] By mixing 3-aminopropyltriethoxysilane and pure water (mass ratio 50:50), and then standing for more than 1 day, a 3-aminopropyltriethoxysilane solution (hereinafter SC solution) was prepare...

Embodiment 2

[0085] The negative electrode slurry a2 and the slurry package A2 were produced under the same conditions as in Example 1 except that the composite particles and the SC solution were mixed at a mass ratio of 100:2. In the negative electrode active material of Example 2, the content of 3-aminopropyltriethoxysilane was 1% by mass based on the composite particles.

Embodiment 3

[0087] The negative electrode slurry a3 and the slurry package A3 were produced under the same conditions as in Example 1 except that the composite particles and the SC solution were mixed at a mass ratio of 100:4. In the negative electrode active material of Example 3, the content of 3-aminopropyltriethoxysilane was 2% by mass based on the composite particles.

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

Each negative electrode active material particle according to the present invention comprises a composite particle that contains a silicon particle and a lithium silicate phase represented by LixSiOy(wherein 0<x<=4 and 0<y<=4) and a surface layer that is formed on the surface of the composite particle; and the surface layer contains a silane coupling agent.

Description

technical field [0001] The present invention relates to a negative electrode active material and a negative electrode for a nonaqueous electrolyte secondary battery. Background technique [0002] It is known that silicon materials such as silicon materials (Si) and silicon oxides represented by SiOx can store more lithium ions per unit volume than carbon materials such as graphite, and applications to negative electrodes such as lithium ion batteries have been studied. Research. [0003] A nonaqueous electrolyte secondary battery using a silicon material as a negative electrode active material has a problem of low charge and discharge efficiency compared to a case where graphite is used as a negative electrode active material. Therefore, in order to improve the charge-discharge efficiency, the use of Li x SiO y A scheme in which lithium silicate represented by (0<x<1.0, 0<y<1.5) is used as a negative electrode active material (see Patent Document 1). [0004]...

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): H01M4/58H01M4/36
CPCH01M4/13H01M4/364H01M4/386H01M4/5825H01M4/62H01M10/052Y02E60/10H01M4/131H01M2004/021H01M2004/027
Inventor 明乐达哉砂野泰三南博之
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com