Asymmetric organic alkyl ethyl carbonates for non-aqueous power

Details Asymmetric organic alkyl ethyl carbonates for non-aqueous power Asymmetric organic alkyl ethyl carbonates for non-aqueous power

1997-12-31

1999-11-16

Reichard, Dean A.

Electricity: electrical systems and devices

Electrolytic systems or devices

Solid electrolytic capacitor

361527, 252 622, H01G 902

Patent

active

059868791

ABSTRACT:
Acyclic, asymmetric ethyl alkyl carbonates, particularly for use with a carbonaceous, e.g., graphite, anode, in electrolytes suitable for portable power sources, are disclosed. Asymmetric alkyl carbonates having the general structural formula EtO--CO.sub.2 R, where R is larger than ethyl, and most preferably equal to butyl, iso-butyl or sec-butyl, are particularly useful in causing the freezing point of the electrolytes in which they are used to decrease dramatically, thus providing the key to low temperature, high cycle life and high capacity for portable power sources.

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patent: 5521027 (1996-05-01), Okuno et al.
patent: 5552238 (1996-09-01), Carlin et al.
patent: 5571635 (1996-11-01), Shu et al.
patent: 5869208 (1999-02-01), Miyasaka

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