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US 6,602,976 B2Granted
Polycarbonate oligomers and polymers for use in electrolytes
AssigneeLithdyne International
InventorsW. Novis Smith, Joel McCloskey
Life of this patent
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Abstract
There is provided novel polycarbonate polymers and oligomers for use as electrolytes in electrochemical devices having a higher content of organic carbonates so as to enhance electrical conductivity. The polymers are prepared by a condensation reaction or by ester exchange.
Claims14
Polymer and oligomer having the following structure:
- H[—(CHR)zCH2O(C═O)OCH2(Q)v(CHR)nO(C═O)OCH2(CHR)z—]xH
- Wherein n is 1, 2, or 3;
- z is 0 to 6, R is hydrogen, methyl, ethyl, —CHR″O(C═O)O—M where R″ is a hydrogen, methyl, ethyl or bridging group;
- M is a crosslinking bond to another part of the molecule, methyl, ethyl, or propyl group or a mix thereof, Q is —(CH2OCH2)—,
- or —CH2NRCH2—;
- V is 0, 1, 2, or 3 and x≧1.
3 more elements
Dependencies are inferred from the claim text.