Back to results
US 8,445,144 B2Granted
Additive for an electrolyte solution for an electrochemical device
AssigneeNEC Corporation
InventorsKoji Utsugi, Yuki Kusachi, Tsuyoshi Katou
Life of this patent
Estimating the term…
Abstract
There is provided a lithium secondary battery which has excellent characteristics such as energy density and electromotive force and is excellent in cycle life and storage stability. An electrolyte solution for secondary battery comprising at least an aprotic solvent having an electrolyte dissolved therein and a compound represented by the general formula (1).
Claims1
An additive for an electrolyte solution for an electrochemical device, said additive comprising a compound represented by the following formula:
- wherein
- R1 and R4 are each independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 5 carbon atoms, a substituted or unsubstituted fluoroalkyl group having 1 to 5 carbon atoms, a polyfluoroalkyl group having 1 to 5 carbon atoms, —SO2X1, wherein X1 is a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms, —SY1, wherein Y1 is a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms, and —COZ, wherein Z is a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms;
- R2 and R3 are each independently selected from the group consisting of an unsubstituted alkyl group having 1 and 3 to 5 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 5 carbon atoms, a substituted or unsubstituted phenoxy group, an unsubstituted fluoroalkyl group having 1 to 5 carbon atoms, a substituted or unsubstituted fluoroalkoxy group having 1 to 5 carbon atoms, a polyfluoroalkoxy group having 1 to 5 carbon atoms, a halogen atom, —NX2X3, wherein X2 and X3 independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms, and —NY2CONY3Y4, wherein Y2 to Y4 independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms.
Dependencies are inferred from the claim text.