High ionic conductivity electrolytes from poly(siloxanes-co-ethylene oxide)
AssigneeSeeo, Inc.
InventorsHany Basam Eitouni, Bing R. Hsieh
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Abstract
Polymer electrolytes offer increased safety and stability as compared to liquid electrolytes, yet there are a number of new challenges that polymer electrolytes introduce. A novel polymer electrolyte, as disclosed herein, is an ionically-conductive polymer with a backbone that is both highly flexible and highly conductive with high conductivity pendant chains attached, thus increasing the concentration of lithium coordination sites and improving ionic conductivity. Previous strategies for comb-type conductive polymers have focused on attaching either conductive pendant chains to a flexible non-conductive backbone or conductive pendant groups to a marginally flexible conductive backbone.
Claims9
A polymer, consisting of:
- oligomeric ethylene oxide groups;
- and
- alternating positions between the oligomeric ethylene oxide groups,
- wherein each alternating position is occupied by either a single silicon-based group or a siloxane-based group, each group selected at random from a plurality of silicon-based groups and siloxane-based groups;
- wherein the silicon-based group has only one silicon atom in its backbone;
- wherein at least some of the silicon-based groups or siloxane based groups have coordinating pendant groups;
- and
- wherein at least one silicon-based groups and at least one siloxane-based group are included in the polymer.
A polymer consisting of the following structure:
- wherein m is an integer ranging from approximately 1 to 10, n is an integer ranging from approximately 10 to 10,000, and p is an integer ranging from approximately 1 to 10;
- and wherein R1 and R2 are each selected independently from the group consisting of:
- —CH3
- —(CH2)3O—(CH2CH2O)o—CH3
- —(CH2)2Si(CH3)2OSi(CH3)2—(CH2)3O—(CH2CH2O)o—CH3
- —(CH2)2Si(CH3)2—(CH2)3O—(CH2CH2O)o—CH3 and
- —(CH2)2Si(CH3)2—O—(CH2CH2O)o—CH3
- wherein o is an integer ranging from approximately 1 to 20.
Dependencies are inferred from the claim text.