Synthesis and applications of mof (metal organic framework) based porous carbon materials containing metal selenide derivatives (MxSey/MzSet (M: Co, Zn, Cu, Sn) in li/na-ion batteries

In this thesis, Cu2Se/ZnSe@NPC, Cu1.95Se@NPC, Cu2Se/Co3Se4@NPC, Cu1.95Se@PC, Cu1.95Se@NPC, ZnSe/SnSe@NPC, Co3Se4/SnSe@NPC, Cu2Se/SnSe@PC composite anode electrode materials were successfully synthesized and structural characterizations were performed by XRD, XPS, BET, SEM, TEM, Raman spectroscopies. In addition, both LIB and SIB half- and full-cell electrochemical performances of these materials were investigated. According to the results obtained, Cu2Se/ZnSe@NPC, Cu1.95Se@NPC, Cu2Se/Co3Se4@NPC, Cu1.95Se@PC, Cu1.95Se@NPC, ZnSe/SnSe@NPC, Co3Se4/SnSe@NPC, Cu2Se/SnSe@PC composite anode electrode materials exhibited initial capacities of 712, 763, 983, 883, 814, 805, 772, 830 and 789 mAhg-1 (at 0.1 Ag-1) in LIBs and 456, 349, 403, 455, 498, 254, 445, 502 mAhg-1 (at 0.1 Ag-1) in SIBs, respectively. In addition, in-situ XRD analysis of the obtained composite anode electrodes was performed and the structural transformations of the electrodes were investigated in detail. The high energy density, fast charge-discharge capacity, long cycle life and structural stability offered by the synthesized structures are promising and instructive for future energy storage systems. As a result of the studies, it has been shown that MOF-derived metal selenide composite materials can be used as high performance anode materials not only at the laboratory level but also in practical applications.This thesis demonstrates that MOF-based materials contribute to the next generation material design in energy technologies and makes a remarkable contribution to the literature.