US 2013/0280600 A1 · SECONDARY BATTERY

Abstract

The object of an exemplary embodiment of the invention is to provide a secondary battery which contains a positive electrode active material operating at a potential of 4.5 V or higher and which has good cycle property at a high temperature. An exemplary embodiment of the invention is a secondary battery, comprising a positive electrode that can absorb and desorb lithium and an electrolyte liquid; wherein the positive electrode comprises a positive electrode active material that operates at a potential of 4.5 V or higher with respect to lithium; and wherein the electrolyte liquid comprises a fluorinated ether represented by a prescribed formula and a cyclic-type sulfonate represented by a prescribed formula.

Claims20

Dependent claims

A secondary battery, comprising a positive electrode that can absorb and desorb lithium and an electrolyte liquid;

wherein the positive electrode comprises a positive electrode active material that operates at a potential of 4.5 V or higher with respect to lithium;
and
wherein the electrolyte liquid comprises a fluorinated ether represented by following formula (1) and a cyclic-type sulfonate represented by following formula (2):
R1—O—R2 (1)
wherein, in formula (1), R1 and R2 each independently denote an alkyl group or an fluorinated alkyl group, and at least one of R1 and R2 is a fluorinated alkyl group;
and
wherein, in formula (2), A and B each independently denote an alkylene group or an fluorinated alkylene group, and X denotes single bond or —OSO2— group.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/977,805Filed 22 Sep 2011

Priority

JP 2011-06584524 Mar 2011

Published

24 Oct 2013

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

H01M 10/0566
The electrolyte being constituted of organic materials only: liquid materials
H01M 4/13
Electrodes composed of, or comprising, active material: electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators;…
H01M 4/505
Of manganese: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525
Of nickel, cobalt or iron: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g.…

Secondary battery

Life of this patent

Secondary battery

Life of this patent

Abstract

Claims20