Characteristics of an advanced Graphene/Pyr1,4TFSI-LiTFSI/LiFePO4 lithium-ion battery.

Safety is considered one of the major issues preventing the worldwide diffusion of the high energy lithium ion batteries as storage system for free-emission, electric vehicles. Recently many efforts aimed to reduce the safety hazard considering the replacement of conventional, high flammable and volatile organic electrolyte with thermally stable, non flammable ionic liquid (IL) solutions. Moreover, ILs may be considered valid solution to avoid issues associated with the use of lithium metal anode, such as dendrite growth with cell shorting and possible fire evolution1. In this work we focus the attention on the use of a Py1,4TFSI-LiTFSI-based electrolyte solution in a novel lithium ion battery employing a Cu-supported graphene anode and a lithium iron phosphate cathode. This cell expected to be characterized by low cost and high performances in terms of stability and safety content. Furthermore, the use of the attractive graphene-based anode in combination with the safe ionic liquid-based electrolyte increases the novelty content of the cell making it of interest for the lithium-ion battery community. The material structure and morphology are characterized by X ray diffraction (XRD) and scanning electronic microscopy (SEM) while the lithium ion cell is studied by galvanostatic cycling (GC).