摘要:
Described are electrolyte compositions and electrochemical devices containing them. The compositions include an organosilicon compound, an imide salt and optionally LiPF6. The electrolytes provide improved high-temperature performance and stability and will operate at temperatures as high as 250C. An electrolyte composition comprising, in combination: an organosilicon compound and an imide salt and optionally UPF6; wherein when subjected to cyclic voltammetry at a plurality of cycles ranging from about 3V to about 5V and using a cathode current collector comprising aluminum versus Li/Lit electrodes the composition exhibits an oxidative corrosion current of about 0.10 mA/cm2 or less for a second and subsequent cycles.
摘要:
Described are compounds of the structure R4- a -Si-(Sp-Y) a -Z b , wherein "a" is integer from 1 to 4; "b" is an integer from 0 to (3 x a); "Z," which is absent when "b "R" or formula (II), wherein each "R" is halogen, C 1-6 linear or branched alkyl, alkenyl, or alkynyl or C 1-6 linear or branched halo-alkyl, halo-alkenyl, or halo-alkynyl; each "Sp" C 1-15 linear or branched alkylenyl or CMS linear or branched halo-alkylenyl; and each "Y" an organic polar group. Also described are electrolyte compositions containing one or more of these compounds.
摘要:
Described herein are liquid, organosilicon compounds that including a substituent that is a cyano (-CN), cyanate (-OCN), isocyanate (-NCO), thiocyanate (-SCN) or isothiocyanate (-NCS). The organosilicon compounds are useful in electrolyte compositions and can be used in any electrochemical device where electrolytes are conventionally used.