Nitrile - substituted silanes and electrolyte composition thereof and an electrochemical device comprising

Described herein are liquid organosilicon compound which contains a cyano group (-CN), a cyanate ester group (-OCN), isocyanate group (-NCO), a thiocyanate group (-SCN) or isothiocyanate group (-NCS) substituent. Organosilicon compounds may be used in any electrochemical device using an electrolyte generally can be used for the electrolyte composition.