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

Non-aqueous electrolyte secondary battery and method for producing same

A non-aqueous electrolyte and secondary battery technology, applied in the direction of non-aqueous electrolyte batteries, electrolyte battery manufacturing, non-aqueous electrolyte battery electrodes, etc., can solve the problems of insufficient safety, no cut-off function, etc., and achieve high volume energy density , Excellent safety effect

Inactive Publication Date: 2008-09-03
SANYO ELECTRIC CO LTD
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the spacer related to the above technology does not have the function of truncation, so the security is not enough

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

[0031]

[0032] Mix 95 parts by mass of lithium cobalt oxide (LiCoO 2 ), 2 mass parts of graphite powder as a conductive agent, 3 mass parts of polyvinylidene fluoride (PVdF) and N-methyl-2-pyrrolidone (NMP) as a binder to obtain a positive electrode active material slurry. This positive electrode active material slurry was coated on both surfaces of an aluminum positive electrode current collector, dried and then rolled to obtain a positive electrode.

[0033]

[0034] Mix 98 mass parts of graphite as negative electrode active material, 1 mass part of styrene butadiene rubber as binder, 1 mass part of carboxymethyl cellulose and water as tackifier, as negative electrode active material pulp. This negative electrode active material slurry was coated on both surfaces of a copper negative electrode current collector, dried and then rolled to prepare a negative electrode.

[0035]

[0036] Coating the slurry dispersed in the following solvent on both sides of the negative...

Embodiment 2

[0046] A nonaqueous electrolyte secondary battery related to Example 2 was produced in the same manner as in Example 1 except that polyethylene having a weight average molecular weight of 1 million was used as the polyethylene resin.

Embodiment 3

[0048] A nonaqueous electrolyte secondary battery related to Example 3 was produced in the same manner as in Example 1 except that polyethylene having a weight average molecular weight of 300,000 was used as the polyethylene resin.

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

Provided is a non-aqueous electrolyte battery with excellent volume energy density and high safety. The battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. Between the positive and negative electrodes is interposed a microporous layer including insulating inorganic particles and a polyolefin. It is preferable that the microporous layer has a thickness of 1 to 10 mum, the polyolefin is polyethylene having a weight-average molecular weight of 500000 or greater, and the insulating inorganic particles have an average particle size of 0.1 to 2 mum.

Description

technical field [0001] The present invention relates to the improvement of the volume energy density of a non-aqueous electrolyte secondary battery. Background technique [0002] Non-aqueous electrolyte secondary batteries have high energy density and high capacitance, so they are widely used as driving power sources for mobile devices. However, in recent years, mobile devices such as mobile phones and notebook computers have become smaller, thinner and more Rapid development requires the search for batteries with higher volumetric energy density. [0003] In the non-aqueous electrolyte secondary battery described above, a wound electrode body in which a positive electrode and a negative electrode separated by a polyolefin separator are used is used. The separator must have the function of reliably insulating the positive and negative electrodes and allowing lithium ions to be transmitted well. However, from the perspective of safety, it is also required that the separator ...

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): H01M2/14H01M10/38H01M10/40H01M2/16H01M4/13H01M4/139H01M10/05
CPCH01M10/0525H01M10/4235H01M50/446Y02E60/10Y02P70/50H01M10/058
Inventor 高桥昌利
Owner SANYO ELECTRIC 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