Additives for increasing ion conductivity of molten salt type electrolyte in battery
AssigneeToyota Motor Engineering & Manufacturing North America, Inc.
InventorsWen Li, Yutaka Oyama
Life of this patent
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Abstract
A lithium-ion battery comprises a negative electrode, a positive electrode, and an electrolyte containing a molten salt, a lithium salt, and an electrolyte additive. The electrolyte additive is chosen to increase the lithium ion conductivity of electrolyte. The electrolyte additive may be an organic, additive, such as an organic carbonate. In other examples, the electrolyte additive provides a source of alkali metal cations other than lithium, such as potassium, sodium, and/or cesium ions. An analogous approach can be taken for batteries using ionic species other than lithium.
Claims6
A battery, comprising:
- a negative electrode;
- a positive electrode;
- and
- an electrolyte, having a cation conductivity for transport of a cation through the electrolyte, the electrolyte including:
- a molten salt,
- a cation source, and
- an electrolyte additive, the electrolyte additive being an organic compound chosen to increase the cation conductivity of the electrolyte, wherein the cation is an alkali metal ion, the cation source being an alkali metal salt and wherein the organic compound is present in an amount insufficient for electrolyte flammability under normal operating conditions while increasing the cation conductivity of the electrolyte.
6-17. (canceled)
Dependencies are inferred from the claim text.