The performance of the novel lithium salt, lithium tetrafluorooxalatophopshate (LiPF4(C2O4)) has been investigated as electrolyte solution in carbonate solvents. Investigation of the performance of LiPF4(C2O4) electrolytes in the presence of different types of anode materials, Mesocarbon Microbead (MCMB) graphite and Nature Graphite (NG), has uncovered a dependence of a first cycle shoulder at 1.75 V and irreversible capacity on the structure of the anodic graphite. Andoes with more irreversible capacity have a thicker anode solid electrolyte interphase (SEI) which is most likely caused by differences in the surface of the graphite. Appropriate choice of graphite leads to first cycle efficiencies which are very similar for LiPF4(C2O4) and LiPF6 electrolytes. (C) 2011 The Electrochemical Society. [DOI: 10.1149/2.008111jes] All rights reserved.