Triple-polymer based composite electrolyte

Details Triple-polymer based composite electrolyte Triple-polymer based composite electrolyte

1998-05-21

2000-12-12

Gupta, Yogendra

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429324, H01M 616, H01M 614

Patent

active

061596396

ABSTRACT:
A WPU(PEG)-WPU(PTMG)-PEO triple-polymer based composite electrolyte is disclosed. The electrolyte includes a thin composite film and an anhydrous liquid electrolyte within the thin film. The thin film is composed of WPU(PTMG) serving as a support, PEO serving as an adsorbent of the liquid electrolytes, and WPU(PEG) serving as a compatibility promoter. On the other hand, the anhydrous liquid electrolyte is used for ionic conduction. The resulting thin film electrolyte has a good conductivity (up to 10.sup.-2 .about.10.sup.-3 S/cm at room temperature), especially within a compositional range of 0.about.75 wt. % WPU(PEG), 0.about.45 wt. % WPU(PTMG), and 20.about.95 wt. % PEO. A WPU(PEG)-WPU(PTMG)-PEO based composite electrolyte is adapted to be used in lithium ion batteries, lithium batteries, and electrochromic devices.

REFERENCES:
patent: 5479278 (1995-12-01), Takauchi et al.
patent: 5843332 (1998-12-01), Takeuchi et al.
patent: 5912093 (1999-06-01), Wen et al.

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