| To solve the global energy crisis,with new energy sources we need to develop new and more reliable resources for the energy storage problem.The energy storage capacity of LIBs needs to be further improved through new battery designs and new electrode materials.For a long time graphite has been used for the lithium ion batteries anode,but it suffers from low energy density.So,there is severe need to develop LIBs for the next generation with high capacity and stable electrode materials.Niobium carbide a rarely investigated member of MXene family has the potential to be employed as a high capacity anode for the LIBs.But it suffers from high self-stacking of the sheets which result in low number of active sites and available surface area for the ions intercalation.In this study,first we prepared a hybrid material of niobium carbide with partially reduced graphene oxide.The interlayer distance of the MXene sheets increases in the hybrid material due to the incorporation of the graphene sheets.When used as anode,the hybrid material exhibited a capacity of 270 mA h g-1 at 0.1 A g-1 even after 500 cycles.Thereafter,to further improve the performance of the material,a porous hybrid aerogel was prepared through hybridizing the niobium carbide with reduced graphene oxide with the help of electrostatic attraction forces.The porous hybrid structure not only increased the accessible surface area but also exposed the inner active sites for the electrolyte ion intercalations.The addition of rGO not only helped in solving the restacking problem but also maintained the high conductivity of the hybrid material.The hybrid material then used as an anode material for the LIB and resulted in exceptional electrochemical properties of 260 mA g h-1 at 1 A g-1 even after1000 cycles.In this study we have presented a facile approach to synthesize niobium carbide hybrid material with prGO and rGO as a potential material for the LIB anode material with high energy density and without capacity decay. |
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