As the key component of electrochemical energy storage devices,an electrode with superior ions transport pores is the important premise for high electrochemical performance.In this paper,we developed a unique solution process to prepare freestanding TiO2/graphene hydrogel electrode with tunable density and porous structures.By incorporating room temperature ionic liquids (RTILs),even upon drying,the non-volatile RTILs that remained in the gel film would preserve the efficient ion transport channels and prevent the electrode from closely stacking,to develop dense yet porous structures.As a result,the dense TiO2/graphene gel film as an electrode for lithium ion battery displayed a good gravimetric electrochemical performance and more importantly a high volumetric performance.