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Highly conductive polymer electrolytes and secondary batteries including the same

A polymer and electrolyte technology, applied in the direction of non-aqueous electrolyte batteries, secondary batteries, electrolytes, etc., can solve problems such as unstable, unsuccessful, and insufficient mechanical properties

Inactive Publication Date: 2012-01-11
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But efforts to use these materials have been erratic and unsuccessful
For example, certain block copolymers have been evaluated in electrolyte compositions, but have exhibited difficulties such as poor thermal stability, insufficient mechanical properties, or not achieving the electrical conductivity required for battery applications (e.g. , ionic conductivity)

Method used

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  • Highly conductive polymer electrolytes and secondary batteries including the same
  • Highly conductive polymer electrolytes and secondary batteries including the same
  • Highly conductive polymer electrolytes and secondary batteries including the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] Example 1. Grafting of polyethylene oxide onto ethylene-acrylic acid copolymer using ester linkages.

[0111] About 15 mg of ethylene-acrylic acid (EAA) copolymer (available at PRIMACOR TM 3340 (commercially available from THE DOW CHEMICAL CO. under the trade name and grade designation) was dissolved in about 200 ml of hot xylene at a temperature of about 100°C. About 20.3 g of poly(ethylene glycol) methyl ether (PEG-ME) having a single hydroxyl group and a number average molecular weight of about 750 (available from Aldrich Chemical) was added to the EAA / xylene solution. The molar ratio of -OH groups on PEG-ME to -COOH groups on EAA is about 2:1. About 1.0g of p-toluenesulfonic acid (about 5.3mmol) and about 0.25g of B225 stabilizer was added to the solution. The solution was heated to reflux for about 20 hours. Water is removed from the reaction by azeotropic distillation and collected (eg, in a Dean-Stark trap). Infrared analysis of the reaction mixture is exp...

Embodiment 2

[0113] Example 2 was prepared analogously to example 1. Use about 26.1g of PRIMACOR TM 3340 and 16.5 g of poly(ethylene glycol) methyl ether having a number average molecular weight of about 350 (available from Aldrich Chemical). The ratio of OH to COOH groups on PEG-ME is about 2.0. Make two kinds of polymers with 1.1g p-toluenesulfonic acid and 0.25g Irganox TM The B225 stabilizer was reacted in about 300 mL of xylene at a reaction temperature of about 100° C. for about 22 hours. The product has at least about 80% of the acid groups on the backbone converted to ester groups, as determined by use of infrared spectroscopy. NMR analysis of the dried product indicated a poly(ethylene oxide) concentration of about 20% by weight.

Embodiment 3

[0115] Example 3 was prepared analogously to example 1. Use about 26.1g of PRIMACOR TM 3340 and 35 g of poly(ethylene glycol-propylene glycol) methyl ether (ie, a copolymer of ethylene oxide and propylene oxide with mono-OH groups) having a number average molecular weight of about 970 (available from Aldrich Chemical) . The ratio of OH to COOH groups on PEG-ME is about 2.0. Make two kinds of polymers with 1.4g p-toluenesulfonic acid and 0.25g Irganox TM The B225 stabilizer was reacted in about 300 mL of xylene at a reaction temperature of about 100° C. for about 20 hours. The product has at least about 80% of the acid groups on the backbone converted to ester groups, as determined by use of infrared spectroscopy. NMR analysis of the dried product was expected to indicate a poly(ethylene oxide) concentration of about 30% by weight of the graft copolymer.

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Abstract

The present invention is directed to novel block copolymers and to novel polymeric electrolyte compositions, such as solid polymer electrolytes that comprises a block copolymer including a first block having a glass transition temperature greater than about 6O DEG C or a melting temperature greater than about 60 DEG C, and a second block including a polyalkoxide. The polymer electrolyte composition preferably has a shear modulus, G', measured at 1 rad / sec and about 30 DEG C and a conductivity, s, measured at about 30 DEG C, such that i) G'- s is greater than about 200 (S / cm)(dynes / cm2); and ii) G' is from about 104 to about 1010 dynes / cm2.

Description

[0001] priority claim [0002] This application claims the benefit of US Provisional Patent Application 61 / 151,662 (filed February 11, 2009), which is hereby incorporated by reference in its entirety for all purposes. field of invention [0003] The present invention relates generally to polymer electrolyte compositions useful in batteries, and in particular to heterogeneous electrolyte compositions having a structural phase and a conductive phase, and including polyalkoxide-containing block copolymers. Background of the invention [0004] Rechargeable batteries have received a great deal of attention in recent years. Such batteries are also increasingly called "secondary batteries" or even "accumulators". They can be operated to store charge and later operated to discharge charge to provide power to the device. Typically, these types of batteries have a small number of active elements, including electrodes (specifically, anodes and cathodes), joined together to perform a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/052
CPCH01M10/052Y02E60/122Y02T10/7011C08G81/025H01M10/0565H01M2300/0091Y02E60/10Y02P70/50Y02T10/70
Inventor 道格拉斯·A·布鲁内苏珊·J·巴比内茨马克·纽沙姆H·C·西尔维斯卡尔顿·L·高普斯特凡尼·L·休斯尼科·L·瓦格纳安德鲁·G·塔利克
Owner DOW GLOBAL TECH LLC
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