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US 10,593,995 B2Granted
Polar polysiloxane electrolytes for lithium batteries
AssigneeSeeo, Inc.
InventorsKulandaivelu Sivanandan, Hany Basam Eitouni
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Abstract
Synthesis and electrochemical properties of a new class of polymer electrolytes based on polar polysiloxane polymers is described. Unlike ethylene oxide-based polymers, these materials are oxidatively stable up to at least 4.2 V, the operating voltage of high energy cells that use cathode materials such as lithium nickel cobalt aluminum oxide (NCA) and lithium nickel cobalt manganese oxide (NCM). Use of these polymers electrolytes as an alternative to PEO in solid-state lithium batteries is described.
Claims13
A polymer composition, comprising:
- a polymer selected from the group consisting of a homo polymer with the structure:
- and a copolymer with the structure:
- wherein each X is selected independently from the group consisting of cyanomethyl ester, pyrrolidone, cyclic carbamate, phosphonate, and phosphate groups;
- each R is selected independently from the group consisting of vinyl, allyl, propargyl, norbornene, cyclopentadienyl, nitroxide, bromo-isobutry bromide, 2,2,6,6-tetramethyl-1-piperidinyloxy, n-tertpbutyl-n-(2-methyl-1-phenylpropyl)-O-(1-phenylethyl)hudroxylamine), hydride, azido propyl, mercaptopropyl, benzophenone, aminopropyl, phenyl, benzyl, napthalene, anthracene, styrene, and acylate groups;
- and substituted moieties of phenyl, benzyl, napthalene, anthracene, styrene, acylate, and norbornene, groups in which the substituting species are methyl, ethyl, propyl, n-butyl or t-butyl groups;
- z is an integer that ranges from 2 to 1000;
- and
- m and n are integers, and the sum of m and n ranges from 2 to 1000.
5 more elements
A polymer composition, comprising:
- a polymer selected from the group consisting of a homopolymer with the structure:
- and a copolymer with the structure:
- wherein each X is selected independently from the group consisting of cyclic carbamate and phosphonate groups;
- each R is selected independently from the group consisting of vinyl and allyl, groups;
- z is an integer that ranges from 2 to 1000;
- and
- m and n are integers, and the sum of m and n ranges from 2 to 1000.
4 more elements
Dependencies are inferred from the claim text.