Electrochemical evaluation of LiAl0.05Ni0.05Mn1.9O4 cathode material synthesized via electrospinning method

Abstract One-dimensional LiAl 0.05 Ni 0.05 Mn 1.9 O 4 nanofibers are prepared by an electrospinning method followed by calcination process to investigate the influences of Al/Ni dual-doping on the structural and electrochemical properties of as-prepared cathode materials for Li-ion batteries. X-ray diffraction (XRD) and scanning electron microscope (SEM) characterization results indicate that the as-prepared material have good crystallinity and uniform morphology. Galvanostatic charge–discharge tests demonstrate LiAl 0.05 Ni 0.05 Mn 1.9 O 4 has an improved cyclic performance at 25 °C and high temperature (55 °C), which originates from the enhanced stability by decreasing lattice constant and suppression of Jahn–Teller effect revealed by XPS analysis. Moreover, From the EIS analysis, it is revealed reduced charge transfer resistance of LiAl 0.05 Ni 0.05 Mn 1.9 O 4 compared with those of undoped LiMn 2 O 4 .