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Al-inserted vanadium pentoxide (V2O5) nanofibers (Al-VNF) are synthesized by simple electrospinning technique. Powder X-ray diffraction (XRD) patterns confirm the formation of phase-pure structure. Elemental mapping and XPS studies are used to confirm chemical insertion of Al in VNF. Surface morphological features of as-spun and sintered fibers with Al-insertion are investigated by field-emission scanning electron microscopy (FE-SEM). Electrochemical Li-insertion behavior of Al-VNFs are explored as cathode in half-cell configuration (vs. Li) using cyclic voltammetry and galvanostatic charge-discharge studies. Al-VNF (Al0.5V2O5) shows an initial discharge capacity of ∼250 mA h g(-1) and improved capacity retention of &gt;60% after 50 cycles at 0.1 C rate, whereas native VNF showed only ∼40% capacity retention at room temperature. Enhanced high current rate and elevated temperature performance of Al-VNF (Al1.0V2O5) is observed with improved capacity retention (∼70%) characteristics. Improved performance of Al-inserted VNF is mainly attributed to the retention of fibrous morphology, apart from structural stabilization during electrochemical cycling.

Improved Elevated Temperature Performance of Al-Intercalated V2O5 Electrospun Nanofibers for Lithium-Ion Batteries

Improved Elevated Temperature Performance of Al-Intercalated V₂O₅ Electrospun Nanofibers for Lithium-Ion Batteries