Non-aqueous electrolyte secondary battery
A non-aqueous electrolyte battery using a lithium-containing metal oxide containing manganese as a positive electrode active material, which can suppress the elution of manganese from the positive electrode active material. The non-aqueous electrolyte secondary battery has a negative electrode capable of intercalating and deintercalating lithium ions, a positive electrode containing a lithium-containing compound as a positive electrode active material, and a non-aqueous electrolyte in which a lithium salt is dissolved in an organic solvent. The lithium-containing compound is a lithium-containing metal oxide containing manganese, and the non-aqueous electrolyte contains a fluorosilane compound: R 1 to R 3 each represents a 1-8 carbon alkyl group, a 2-8 carbon alkenyl group, a 5-8 carbon cycloalkyl group, a 6-8 carbon aryl group or a fluorine atom, and R 4 represents a 1-8 carbon alkylene group or a 4-8 carbon alkylene group having an ether group.
1. A non-aqueous electrolyte secondary battery having a negative electrode that is capable of intercalating and deintercalating lithium ions, a positive electrode containing a lithium-containing compound as a positive electrode active material, and a non-aqueous electrolyte in which a lithium salt is dissolved in an organic solvent,
wherein the lithium-containing compound is a lithium-containing metal oxide that contains manganese, and the non-aqueous electrolyte contains a fluorosilane compound represented by the following general formula (1):
wherein R 1 to R 3 each independently represent an alkyl group having 1 to 8 carbon(s), an alkenyl group having 2 to 8 carbons or a fluorine atom, and R 4 represents an alkylene group having 1 to 8 carbon(s) or an alkylene group having 4 to 8 carbons having an ether group.
2. The non-aqueous electrolyte secondary battery according to claim 1 , wherein the non-aqueous electrolyte further contains an unsaturated phosphate ester compound represented by the following general formula (2) or an unsaturated phosphate ester compound represented by the following general formula (3):
wherein R 5 and R 6 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon(s), and R 7 represents an alkyl group having 1 to 8 carbon(s), an alkenyl group having 2 to 8 carbons, an alkynyl group having 2 to 8 carbons or a halogenated alkyl group having 1 to 8 carbon(s):
wherein R 8 and R 9 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon(s), R 10 represents an alkyl group having 1 to 8 carbon(s), an alkenyl group having 2 to 8 carbons, an alkynyl group having 2 to 8 carbons or a halogenated alkyl group having 1 to 8 carbon(s), and n represents 1 or 2.
3. The non-aqueous electrolyte secondary battery according to claim 1 , wherein the non-aqueous electrolyte further contains a fluorosilane compound represented by the following general formula (4):
wherein R 11 and R 12 each independently represent an alkyl group having 1 to 8 carbon(s), an alkenyl group having 2 to 8 carbons, an alkynyl group having 2 to 8 carbons, a halogenated alkyl group having 1 to 8 carbon(s), an aryl group having 6 to 18 carbons, a halogenated aryl group having 6 to 18 carbons or an aralkyl group having 7 to 18 carbons, X 1 represents a fluorine atom, an alkyl group having 1 to 8 carbon(s), an alkenyl group having 2 to 8 carbons, an alkynyl group having 2 to 8 carbons, a halogenated alkyl group having 1 to 8 carbon(s), an aryl group having 6 to 18 carbons, a halogenated aryl group having 6 to 18 carbons, an aralkyl group having 7 to 18 carbons, a group represented by the following general formula (5) or a group represented by the following general formula (6):
wherein R 11 and R 12 are as defined in the general formula (4), and R 13 represents an alkylene group having 1 to 8 carbon(s), an alkenylene group having 2 to 8 carbons, an alkynylene group having 2 to 8 carbons or an arylene group having 6 to 18 carbons;
—R 14 —X 2 —R 15 (6)
wherein R 14 represents an alkylene group having 1 to 8 carbon(s), an alkenylene group having 2 to 8 carbons, an alkynylene group having 2 to 8 carbons or an arylene group having 6 to 18 carbons, R 15 represents an alkyl group having 1 to 8 carbon(s), an alkenyl group having 2 to 8 carbons, an alkynyl group having 2 to 8 carbons, a halogenated alkyl group having 1 to 8 carbon(s), an aryl group having 6 to 18 carbons, a halogenated aryl group having 6 to 18 carbons or an aralkyl group having 7 to 18 carbons, and X 2 represents an oxygen atom, a —C(═O)—O— group or an —O—C(═O)— group.
4. A non-aqueous electrolyte, which is used in the non-aqueous electrolyte secondary battery according to claim 1 .
5. The non-aqueous electrolyte secondary battery according to claim 2 , wherein the non-aqueous electrolyte further contains a fluorosilane compound represented by the following general formula (4):
wherein R 11 and R 12 each independently represent an alkyl group having 1 to 8 carbon(s), an alkenyl group having 2 to 8 carbons, an alkynyl group having 2 to 8 carbons, a halogenated alkyl group having 1 to 8 carbon(s), an aryl group having 6 to 18 carbons, a halogenated aryl group having 6 to 18 carbons or an aralkyl group having 7 to 18 carbons, X 1 represents a fluorine atom, an alkyl group having 1 to 8 carbon(s), an alkenyl group having 2 to 8 carbons, an alkynyl group having 2 to 8 carbons, a halogenated alkyl group having 1 to 8 carbon(s), an aryl group having 6 to 18 carbons, a halogenated aryl group having 6 to 18 carbons, an aralkyl group having 7 to 18 carbons, a group represented by the following general formula (5) or a group represented by the following general formula (6):
wherein R 11 and R 12 are as defined in the general formula (4), and R 13 represents an alkylene group having 1 to 8 carbon(s), an alkenylene group having 2 to 8 carbons, an alkynylene group having 2 to 8 carbons or an arylene group having 6 to 18 carbons;
—R 14 —X 2 —R 15 (6)
wherein R 14 represents an alkylene group having 1 to 8 carbon(s), an alkenylene group having 2 to 8 carbons, an alkynylene group having 2 to 8 carbons or an arylene group having 6 to 18 carbons, R 15 represents an alkyl group having 1 to 8 carbon(s), an alkenyl group having 2 to 8 carbons, an alkynyl group having 2 to 8 carbons, a halogenated alkyl group having 1 to 8 carbon(s), an aryl group having 6 to 18 carbons, a halogenated aryl group having 6 to 18 carbons or an aralkyl group having 7 to 18 carbons, and X 2 represents an oxygen atom, a —C(═O)—O— group or an —O—C(═O)— group.
6. A non-aqueous electrolyte, which is used in the non-aqueous electrolyte secondary battery according to claim 2 .
7. A non-aqueous electrolyte, which is used in the non-aqueous electrolyte secondary battery according to claim 3 .
8. A non-aqueous electrolyte, which is used in the non-aqueous electrolyte secondary battery according to claim 6 .