Nonaqueous liquid electrolyte
First Claim
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1. A nonaqueous liquid type polymeric electrolyte comprising:
- poly(siloxane-g-ethylene oxide) represented by the formula wherein n=4 to 20, m=0 to 20, and R4 is [—
O-(alkylene oxide)k-R11] wherein R11 is alkyl group; and
at least one ionizable salt.
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Abstract
Disclosed is a nonaqueous liquid electrolyte comprising poly(siloxane-g-3 ethylene oxide) and its synthesis. This electrolyte provides significant safety, improved electrochemical stability, improved conductivity, lower impedance, and lower manufacturing costs.
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Citations
67 Claims
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1. A nonaqueous liquid type polymeric electrolyte comprising:
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poly(siloxane-g-ethylene oxide) represented by the formula wherein n=4 to 20, m=0 to 20, and R4 is [—
O-(alkylene oxide)k-R11] wherein R11 is alkyl group; and
at least one ionizable salt. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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- 26. A method for synthesizing a polyhydrosiloxane intermediary for preparing poly(siloxane-g-ethylene oxide), represented by the formula:
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38. A method for synthesizing a polysiloxane electrolyte comprising the acts of:
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providing a polyhydrosiloxane intermediary represented by the formula;
wherein n=4 to 20 and at least R4, R5, R6, or R7 comprises hydrogen;
mixing with a hydroxyl compound;
adding a dehydrocoupling catalyst;
flushing with inert gas;
adding a solvent;
heating the resulting mixture;
stirring;
drying in a vacuum; and
doping with at least one lithium salt. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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60. A method for synthesizing poly(siloxane-g-3 ethylene oxide) (n˜
- 8) comprising the acts of;
providing precursor 1,3,5,7-tetramethylcyclcotetrasiloxane (D4H);
providing a chain stopping compound hexamethyldisiloxane (HMDS);
performing a ring opening polymerization reaction;
adding HMDS (in a 1;
2 molar ratio) in the presence of concentrated sulfuric acid;
stirring;
bringing mixture to room temperature;
washing;
dissolving in solvent;
removing the solvent;
mixing with an ethyleneglycol monomethyl ether, and adding a dehydrocoupling catalyst. - View Dependent Claims (61, 62, 63, 64, 65, 66, 67)
- 8) comprising the acts of;
Specification