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US 9,318,772 B2Granted
Additives for lithium-ion accumulators
AssigneeRobert Bosch GmbH
InventorsBernd Schumann, Martin Holger Koenigsmann
Life of this patent
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Abstract
A lithium-ion accumulator includes an anode, a cathode, a separator, and an electrolyte which is in connection with the anode and the cathode, which electrolyte includes at least one lithium salt as electrolyte salt and a solvent solubilizing the at least one lithium salt. The at least one lithium salt reacts with water to form an hydrogenous acid, and the electrolyte includes at least one additive, which reacts with the hydrogenous acid to form a compound acting as electrolyte salt.
Claims6
A lithium-ion accumulator, comprising:
- an anode;
- a cathode;
- a separator;
- and
- an electrolyte in contact with the anode and the cathode, the electrolyte including:
- at least one lithium salt as a first electrolyte salt;
- a solvent solubilizing the lithium salt, the solubilized electrolyte salt reacting with water to form at least one hydrogenous acid;
- and
- at least one additive which reacts with the at least one hydrogenous acid to form a compound acting as a second electrolyte salt;
- wherein the additive is a compound of the form MXYZ, M being a complex including an element selected from the group consisting of elements of main group III, and X, Y, and Z each being selected from the group consisting of:
- (a) a halogen selected from the group consisting of bromine and iodine;
- (b) a cyano group;
- (c) a carbonyl group;
- and
- (d) an amine of the form NR1R2R3, and each of R1, R2, and R3 being selected from the group consisting of:
- (i) hydrogen;
- (ii) at least one of branched and unbranched alkyl chains with C1-C18;
- and
- (iii) at least one of branched and unbranched alkyl, mono- or polyunsaturated with C1-C18, wherein the C1-C18 residual includes at least one of a cyclical structure and an ether group.
16 more elements
A lithium-ion accumulator, comprising:
- an anode;
- a cathode;
- a separator;
- and
- an electrolyte in contact with the anode and the cathode, the electrolyte including:
- at least one lithium salt as a first electrolyte salt;
- a solvent solubilizing the lithium salt, the solubilized electrolyte salt reacting with water to form at least one hydrogenous acid;
- and
- at least one additive which reacts with the at least one hydrogenous acid to form a compound acting as a second electrolyte salt;
- wherein the additive is a compound of the form MXYZ, M being a complex including an element selected from the group consisting of:
- gallium, indium, and thallium, and X, Y, and Z each being selected from the group consisting of:
- (a) a halogen selected from the group consisting of bromine and iodine;
- (b) a cyano group;
- (c) a carbonyl group;
- and
- (d) an amine of the form NR1R2R3, and each of R1, R2, and R3 being selected from the group consisting of:
- (i) hydrogen;
- (ii) at least one of branched and unbranched alkyl chains with C1-C18;
- and
- (iii) at least one of branched and unbranched alkyl, mono- or polyunsaturated with C1-C18, wherein the C1-C18 residual includes at least one of a cyclical structure and an ether group.
17 more elements
Dependencies are inferred from the claim text.