TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The composition (C1) comprises the silane compound (I) (0.5-20, preferably 1-15) wt.%. Preferred Compound: The silane compound (I) is preferably of R1-(Si(R4)((CH2-SiR6R8)p-R7)-(A1)n-O)m-R2 (I). Preferred Component: The lithium salt has a concentration of 0.5-2 M.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The high dielectric constant solvent is selected from ethylene carbonate, propylene carbonate, butylene carbonate and/or gamma butyrolactone. The low boiling point solvent is selected from dimethyl carbonate, ethylmethyl carbonate, diethyl carbonate, dipropyl carbonate, dimethoxyethane, diethoxyethane and/or fatty acid ester derivatives. Preferred Definitions:    A1=oxyethylene, oxypropylene, oxybutylene or oxypentylene.    Provided that at least one of R4, R6, R7 and R8 is an alkoxy group selected from methoxy, ethoxy, propoxy, butoxy and/or pentoxy.    WIDER DISCLOSURE - Also disclosed, a silane compound of formula R1-(Si((CH2-SiR3R5)q-R4)((CH2-SiR6R8)p-R7)-(A1)n-O)m-R2 (I) as new.    SPECIFIC COMPOUNDS - 6 Compounds are specifically claimed as the silane compound (I) e.g. CH3O-Si(CH3)(OCH3)((OCH2CH2)11)-OCH3, CH3O-Si(OCH3)(OCH3)((OCH2CH2)11)-OCH3, CH3-Si(CH3)(OCH3)((OCH2CH2)11)-OCH3, CH3-(Si(CH3)(CH2Si(OCH3)3)-(OCH2CH2)8-O)3-CH2 and CH3-(Si(OCH3)(CH2Si(OCH3)3)-(OCH2CH2)8-O)3-CH2.    EXAMPLE - An organic electrolyte solution (test) comprising poly(ethyleneglycol)methyl ether methacrylate of formula CH3-(Si(CH3)(CH2Si(OCH3)3)-(OCH2CH2)8-O)3-CH2 (5 wt.%), ethylene carbonate (30 vol.%), diethyl carbonate (70 vol.%) and LiN(C2F2SO2)2 (BETI) as a lithium salt was prepared. A control organic electrolyte solution was prepared similarly, except poly(ethyleneglycol)methyl ether methacrylate of formula CH3-(Si(CH3)(CH2Si(OCH3)3)-(OCH2CH2)8-O)3-CH2 was not used. The test/control organic electrolyte solutions were then used for making lithium battery. The test/control lithium batteries were then evaluated for charge/discharge efficiency and capacity retention ratio. The results for test/control lithium batteries were: charge/discharge efficiency (%) = 99.97/99.74, and capacity retention ratio (%) = 71.7/65.6, respectively. The results showed that the test battery exhibited excellent charge/discharge efficiency and capacity retention ratio as compared to the control battery.