Non-aqueous electrolyte secondary battery

摘要

Disclosed is a non-aqueous electrolyte secondary battery using a polyanion compound or a lithium nickelate as a positive electrode active material, suppressing the elution of a transition metal from the polyanion compound or ameliorating the deterioration of a binder by a residual alkali component, and provides a non-aqueous electrolyte secondary battery having a negative electrode intercalating and deintercalating lithium ions, a positive electrode containing a lithium-containing compound as a positive electrode active material, and a non-aqueous electrolyte with a lithium salt dissolved in organic solvent. The lithium-containing compound is a polyanion compound or a lithium nickelate. The non-aqueous electrolyte contains a fluorosilane compound:;;R1 to R3: alkyl group having 1-8 carbon(s), an alkenyl group having 2-8 carbons, a cycloalkyl group having 5-8 carbons, an aryl group having 6-8 carbons or a fluorine atom. R4: alkylene group having 1-8 carbon(s) or an alkylene group having 4-8 carbons having an ether group.

主权项

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 polyanion compound or a lithium nickelate, and the non-aqueous electrolyte contains a fluorosilane compound represented by the following general formula (1): wherein R1 to R3 each independently represent an alkyl group having 1 to 8 carbon(s) or a fluorine atom, and R4 represents an alkylene group having 1 to 8 carbon(s) or an alkylene group having 4 to 8 carbons having an ether group.