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

Alumina, slurry containing same, and porous alumina film, laminated separator, nonaqueous electrolyte secondary battery and method for manufacturing nonaqueous electrolyte secondary battery using same

A non-aqueous electrolyte, secondary battery technology, applied in the field of alumina, can solve the problems of reduced safety, reduced battery durability, battery swelling, etc.

Active Publication Date: 2018-09-28
SUMITOMO CHEM CO LTD
View PDF10 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, it is known that in a battery using an alumina porous membrane, a small amount of hydrogen fluoride present in the battery reacts with alumina to fluorinate the surface of the alumina, at which time water is generated, and the water reacts with the electrolyte solution to electrolyze Liquid decomposes, and gas is generated, and there is concern that the durability of the battery such as cycle characteristics and storage characteristics may decrease
In addition, the generation of gas not only reduces the durability of the battery, but also sometimes causes swelling and rupture of the battery, which also causes a decrease in safety.

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
  • Alumina, slurry containing same, and porous alumina film, laminated separator, nonaqueous electrolyte secondary battery and method for manufacturing nonaqueous electrolyte secondary battery using same
  • Alumina, slurry containing same, and porous alumina film, laminated separator, nonaqueous electrolyte secondary battery and method for manufacturing nonaqueous electrolyte secondary battery using same
  • Alumina, slurry containing same, and porous alumina film, laminated separator, nonaqueous electrolyte secondary battery and method for manufacturing nonaqueous electrolyte secondary battery using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3）

[0205] Aluminum hydroxide produced by the Bayer method was used as a raw material, fired in a gas furnace, and then pulverized with a ball mill to obtain an average particle size of 0.5 μm and a BET specific surface area of ​​6 m 2 / g of α-phase alumina powder.

[0206] The above α-alumina powder was dispersed in an ethanol solution of magnesium nitrate hexahydrate, dried under reduced pressure at 60°C, and then heated at 600°C for 2 hours to obtain Mg=690 to 8700 mass ppm shown in Table 1. Mg-modified alumina powder (1)-(3).

[0207]The obtained Mg-modified alumina powders (1) to (3) had a high surface Mg content of 1.1 to 3.7 at%, and as a result of the electrolyte stability test, the amount of gas generated was very small at 10 to 22 mL / g.

[0208] The amount of impurities in the obtained Mg-modified alumina powder (1) was Si = 0.02% by mass, Na = 0.03% by mass, Fe = 0.01% by mass, Cu = 10 mass ppm or less, Zr = 10 mass ppm or less, excluding the added The purity of Mg al...

Embodiment 4～16）

[0211] Except using the ethanol solution of potassium nitrate, calcium nitrate, strontium nitrate, barium nitrate and lanthanum acetate to replace the magnesium nitrate hexahydrate of Examples 1-3, other are processed in the same way as Examples 1-3, and obtain the following table 1 The indicated contents (wtppm) and surface concentrations (at%) contain K, Ca, Sr, Ba and La metal-modified alumina powders (4) to (16). Using this alumina powder, the above-mentioned electrolytic solution stability test was performed, and the results are shown in Table 1.

Embodiment 17）

[0253] Aluminum hydroxide produced by the Bayer method is used as a raw material, fired in a gas furnace, and crushed with a ball mill. The crushed alumina powder was heat-treated at 600°C for 2 hours to obtain an average particle size of 0.4 μm and a BET specific surface area of ​​6 m 2 / g of α-alumina powder (17).

[0254] Such as figure 1 As shown, in the infrared absorption spectrum of α-alumina powder (17) obtained by Fourier transform infrared spectroscopy, it will connect 3400cm -1 strength and 3500cm -1 The line segment of the intensity is used as the baseline, at 3400-3500cm -1 There is no range in which the intensity is greater than this baseline and the half-width is 90cm -1 the following peaks. In addition, the mass reduction rate A was 0.11%, the mass reduction rate B was 0.01%, the maximum value of the mass reduction rate C was 0.002%, and the purity was 99.89 mass%. In this way, the α-alumina powder (17) has a small amount of hydration water in the alumin...

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
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

Provided are an alumina having a high electrolyte stability, a slurry containing the same, and a porous alumina film, a laminated separator, a nonaqueous electrolyte secondary battery and a method formanufacturing a nonaqueous electrolyte secondary battery, each using the same. In the first embodiment of the present invention, provided is an alumina comprising one or more elements selected from the group consisting of K, Mg, Ca, Sr, Ba and La in an amount of 200-50,000 ppm by mass in total, wherein the surface concentration of the element(s) is 0.5-20 at% in total. In the second embodiment ofthe present invention, provided is an alumina having no peak, the peak strength of which exceeds a base line, said base line being a segment connecting the strength at 3400 cm-1 and the strength at 3500 cm-1, and the half width of which is not more than 90 cm-1 peak, in the range of 3400-3500 cm-1 in the infrared absorption spectrum obtained by Fourier transform infrared spectroscopy.

Description

technical field [0001] The present invention relates to alumina suitable for forming an alumina porous film on at least one surface of a positive electrode, a negative electrode, or a separator constituting a nonaqueous electrolyte secondary battery. Moreover, this invention relates to the slurry containing this alumina, and the nonaqueous electrolyte secondary battery which has an alumina porous membrane containing this alumina, and its manufacturing method. Background technique [0002] Non-aqueous electrolyte secondary batteries, especially lithium-ion secondary batteries, have high energy density, so they can be used in small consumer devices such as mobile phones and personal computers. In addition, in recent years, in addition to these small devices, they have also been used in automotive applications are also accelerating. [0003] A non-aqueous electrolyte secondary battery is a battery using an organic solvent-based electrolyte, and generally has a positive elect...

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): C01F7/02H01M2/16H01M4/13H01M4/139H01M4/62H01M10/0566
CPCH01M4/13H01M10/0525H01M10/058H01M2220/30H01M2220/20H01M50/431H01M50/451H01M50/491H01M50/443H01M50/403H01M50/406C01F7/02Y02E60/10Y02P70/50H01M10/4235H01M10/052C01P2006/80C01P2006/12C01P2002/82C01P2002/88C01P2004/61C01P2004/62C01F7/441C01P2002/54H01M4/139H01M4/62H01M50/446H01M50/449H01M10/0566
Inventor 尾崎裕谦安东博幸
Owner SUMITOMO CHEM CO 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