Polymer electrolytes including porous organic particles

A polymer and electrolyte technology, applied in the field of multi-phase materials, can solve the problems of not obtaining the electrical conductivity of the battery pack, insufficient mechanical properties, and unstable efforts, and achieve efficient ion mobility, good mechanical properties, and easy operation. Effect

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

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Problems solved by technology

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

Method used

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  • Polymer electrolytes including porous organic particles
  • Polymer electrolytes including porous organic particles
  • Polymer electrolytes including porous organic particles

Examples

Experimental program
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Effect test

Embodiment 1

[0119] 43.6 wt% PS-L-1, 43.6 wt% PEO-1 and 12.8 wt% lithium triflate were combined in a beaker with enough deionized water to dissolve the PEO. The mixture was mixed overnight at a temperature of about 25°C. The mixing temperature was kept below the glass transition temperature of the polymers in the PS-L-1 latex. Continue mixing until the PEO-1 is dissolved and the solution is uniform. The solution was then dried at room temperature using a continuous stream of nitrogen gas to remove water. Drying was accomplished under vacuum at room temperature to remove residual water. After drying, the composition contained a molar ratio of oxirane groups (EO) on polyethylene oxide to lithium (ie, on lithium triflate) of about 12:1.

Embodiment 2-6

[0121] Examples 2, 3, 4, 5 and 6 were prepared using a procedure similar to that in Example 1 using the concentrations given in Table 2. The concentration of lithium triflate is selected such that the molar ratio of oxygen (ie, ethylene oxide) to lithium (ie, lithium triflate) is about 12:1. Example 2 and Example 3 were prepared at a weight ratio of PS-L-1:PEO-1 of about 2:1 and about 3:1, respectively. Examples 4, 5 and 6 were prepared using PS-L-2 instead of PS-L-1. Example 4, Example 5, and Example 6 were prepared at PS-L-2:PEO-1 weight ratios of about 1:1, about 2:1, and about 3:1, respectively.

[0122] As shown in Table 2, Comparative Example 7 was prepared by mixing PEO-1 with lithium triflate at a temperature higher than the melting temperature of PEO-1.

[0123] Examples containing propylene carbonate solvent were prepared by dissolving PEO in deionized water to form a PEO solution, and mixing the PEO solution with latex (which contained about 50% polymer and about ...

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Abstract

The present invention is directed to an electrolyte comprising a first phase including a porous organic microparticle; and a second phase including an ethylene oxide-containing polymer (i.e., an EOP); wherein the second phase is a continuous phase. The polymeric electrolyte compositions preferably also includes a lithium salt and optionally a solvent. The polymeric electrolyte composition may have 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 / 151,604, filed February 11, 2009, which is incorporated herein by reference in its entirety for all purposes. Field of Invention [0003] The present invention relates generally to heterophasic materials comprising ethylene oxide-containing polymers and organic particles, and in particular, to materials that can be used as solid polymer electrolytes, for example as ionically conductive layers between electrodes in batteries material, the ion conductive layer uses organic fine particles. Background of the Invention [0004] Rechargeable battery packs have received tremendous attention in recent years. These batteries are also increasingly known as "secondary batteries" or even "batteries". They can be operated to store charge, and thereafter operated to discharge charge to power the device. Typically, these types of batteries have a small number of active elements inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/052
CPCH01M2300/0082H01M10/052Y02E60/122Y02T10/7011H01M10/0565H01M2300/0091Y02E60/10C08L25/04C08L71/02Y02T10/70
Inventor 多里·J·荣兹道格拉斯·A·布鲁内斯特凡妮·L·休斯瓦列里·金兹伯格苏珊·J·巴比内茨苏达卡尔·巴利耶帕里
Owner DOW GLOBAL TECH LLC
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