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

One-dimensional LiAl0.05Ni0.05Mn1.9O4 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 LiAl0.05Ni0.05Mn1.9O4 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 LiAl0.05Ni0.05Mn1.9O4 compared with those of undoped LiMn2O4.