%0 Journal Article %T Li/LiFePO4 battery performance with a guanidinium-based ionic liquid as the electrolyte %A XinYue Zhang %A ShaoHua Fang %A ZhengXi Zhang %A Li Yang %J Chinese Science Bulletin %@ 1861-9541 %D 2011 %I %R 10.1007/s11434-011-4655-0 %X A new guanidinium-based ionic liquid (IL) was investigated as a novel electrolyte for a lithium rechargeable battery. The viscosity, conductivity, lithium redox behavior, and charge-discharge characteristics of the lithium rechargeable batteries were investigated for the IL electrolyte with 0.3 mol kg 1 lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt. Li/LiFePO4 cells incorporating the IL electrolyte without additives showed good cycle properties at a charge-discharge current rate of 0.1 C, and exhibited good rate capabilities in the presence of a mass fraction of 10% vinylene carbonate or gamma-butyrolactone. %K lithium battery %K lithium iron phosphate %K ionic liquid %K guanidinium %U http://link.springer.com/article/10.1007/s11434-011-4655-0