Exceptional Performance of TiNb2O7 Anode in All One-Dimensional Architecture by Electrospinning

We report the extraordinary performance of an Li-ion battery (full-cell) constructed from one-dimensional nanostructured materials, i.e. nanofibers as cathode, anode, and separator-cum-electrolyte, by scalable electrospinning. Before constructing such a one-dimensional Li-ion battery, electrospun materials are individually characterized to ensure its performance and balancing the mass loading as well. The insertion type anode TiNb2O7 exhibits the reversible capacity of similar to 271 mAh g(-1) at current density of 150 mA g(-1) with capacity retention of similar to 82% after 100 cycles. Under the same current density, electrospun LiMn2O4 cathode delivered the discharge capacity of similar to 118 mAh g(-1). Gelled electrospun polyvinylidene fluoride-co-hexafluoropropylene (PVdF-HFP) nanofibers membrane is used as the separator-cum-electrolyte in both half-cell and full-cell assembly which exhibit the liquid like conductivity of similar to 2.9 mS cm(-1) at ambient conditions. Full-cell, LiMn2O4 vertical bar gelled PVdF-HFPITiNb2O7 is constructed by optimized mass loading of cathode with respect to anode and tested between 1.95 and 2.75 V at room temperature. The full-cell delivered the reversible capacity of 116 mAh g(-1) at current density of 150 mA g(-1) with operating potential and energy density of similar to 2.4 and similar to 278 Wh kg(-1), respectively. Further, excellent cyclability is noted for such configuration irrespective of the applied current densities.