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

Nonaqueous electrolyte battery

A non-aqueous electrolyte and battery technology, which is applied in the manufacture of non-aqueous electrolyte batteries, electrodes of non-aqueous electrolyte batteries, and electrolyte batteries, and can solve problems such as side reactions and capacity reduction

Active Publication Date: 2015-03-25
KK TOSHIBA
View PDF9 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lithium-nickel composite oxides are prone to side reactions on the electrode, which has the disadvantage of decreasing capacity when repeated cycles

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
  • Nonaqueous electrolyte battery
  • Nonaqueous electrolyte battery
  • Nonaqueous electrolyte battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0016] Embodiments provide a nonaqueous electrolyte battery. The nonaqueous electrolyte battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode includes a positive electrode current collector and a positive electrode active material-containing layer formed on the positive electrode current collector. The positive electrode active material-containing layer contains at least one lithium-nickel composite oxide and a conductive agent. In the particle size distribution obtained by the laser diffraction scattering method of the layer containing the positive electrode active material, the average particle diameter d 50 In the range of 1 μm to 5.5 μm, the maximum particle size is in the range of 10 μm to 100 μm, and the cumulative frequency from the small particle size side is 10% particle size d 10 It is in the range of 0.5 μm to 3 μm. By X=(d 50 -d 10 ) / d50 is in the range of 0.5 or more and less than 1.

[0017] The li...

Embodiment 1

[0118] In Example 1, follow the steps below to make Figure 1 ~ Figure 3 The non-aqueous electrolyte battery 1 shown.

[0119] [Production of positive electrode 6]

[0120] As the positive electrode active material, LiNi with an average particle size of 6 μm is used 7 / 10 co 2 / 10 mn 1 / 10 o 2 . The active material, acetylene black, graphite and polyvinylidene fluoride were mixed in a ratio of 100:8:5:3 according to the following steps. First, the active material, acetylene black and graphite are dry mixed using a Henschel mixer. After dry mixing, polyvinylidene fluoride and N-methyl-2-pyrrolidone were added to the obtained dry mixture, and wet mixing was performed with a planetary mixer. Thereby, a mixture containing each material in the above ratio was produced.

[0121] Next, the obtained mixture was put into an autorotation-revolution mixer THINKY Seinataro (ARE-250), and the rotation speed was set at 2000 rpm, and stirring was performed for 30 minutes. Next, the mix...

Embodiment 2

[0146] In Example 2, the nonaqueous electrolyte battery 1 was produced in the same procedure as in Example 1 except that the rotational speed of the sand mill was set to 1000 rpm.

[0147] Regarding the non-aqueous electrolyte battery 1 of Example 2, the charge-discharge cycle characteristics and particle size distribution were evaluated in the same manner as in Example 1.

[0148] The capacity retention rate after 300 cycles of the non-aqueous electrolyte battery 1 of Example 2 was 85%. In addition, in the particle size distribution related to the non-aqueous electrolyte battery 1 of Example 2, the average particle size d 50 3.9μm, particle size d 10 is 1.37 μm, the maximum particle size is 15.4 μm, and the value of X is 0.65.

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
densityaaaaaaaaaa
densityaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

Embodiments of the invention provide a nonaqueous electrolyte battery with good charge-discharge cycle performance. Embodiments provide a nonaqueous electrolyte battery (1) including a positive electrode (6), a negative electrode (7), and a nonaqueous electrolyte. The positive electrode (6) includes a positive electrode current collector (61) and a positive electrode active material-containing layer (62) formed on the positive electrode current collector (61). The positive electrode active material-containing layer (62) includes at least one lithium-nickel composite oxide and a conductive agent. The positive electrode active material-containing layer (62) has, in a particle size distribution obtained by a laser diffraction scattering method, an average particle diameter d50 within a range of 1 [mu]m to 5.5 [mu]m, a maximum particle diameter within a range of 10 [mu]m to 100 [mu]m, a particle diameter d10, with a cumulative frequency of 10% from the small particle size side, within a range of 0.5 [mu]m to 3 [mu]m, and X, represented by X = (d50 - d10 ) / d50, within a range of 0.5 to less than 1.

Description

[0001] This application is based on Japanese patent application 2013-193475 (filing date: September 18, 2013) and Japanese patent application 2014-177776 (filing date: September 2, 2014), and enjoys priority from the above applications. This application incorporates the above application in its entirety by reference to the above application. technical field [0002] Embodiments of the present invention relate to nonaqueous electrolyte batteries. Background technique [0003] Lithium-ion secondary batteries, which are non-aqueous electrolyte batteries, have been introduced into electronic devices such as smartphones and notebook personal computers, and vehicles such as hybrid cars, plug-in hybrid cars, and electric cars, and have become popular. A lithium ion secondary battery can be produced, for example, by laminating a positive electrode and a negative electrode through a separator to form an electrode group, or by winding the laminate formed as described above to obtain a...

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): H01M4/13
CPCH01M4/505H01M4/525H01M4/625H01M10/058C01P2004/51C01P2004/61H01M4/485H01M4/623H01M10/0525H01M2004/021Y02E60/10H01M4/131H01M4/366Y02T10/70
Inventor 吉川辉栗山和哉猿渡秀乡田中政典鹿野哲郎
Owner KK TOSHIBA
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