A phase-inversion process to prepare porous LiAl0.1Mn1.9O4 spinel for aqueous rechargeable lithium batteries

A porous LiAl0.1Mn1.9O4 (P-LAMO) spinel was prepared by a phase-inversion process followed by calcined at 700 °C for 6 h in the air atmosphere. Its crystal structure was determined from X-ray diffraction (XRD) pattern, and the morphology was observed using the scanning electron microscope (SEM) and transmission electron microscope (TEM). In the 1.0 mol l−1 Li2SO4 aqueous electrolyte, it can deliver the capacities of 117, 113, 104 and 88 mAh g−1 at the rates of 1, 5, 10 and 20 C at room temperature, respectively. Even charged at 60 C, it is still able to deliver a capacity of 113 mAh g−1 at 1 C with a coulomb efficiency of 98%. The results suggest that the product could be a promising cathode material for aqueous rechargeable lithium batteries.

Figure optionsDownload as PowerPoint slideHighlights
► Highly porous LiAl0.1Mn1.9O4 spinel has been prepared by a phase-inversion technology.
► The as-prepared spinel exhibited excellent rate and cycling abilities in an aqueous electrolyte (1 mol l−1 Li2SO4).
► It could be a promising cathode material for aqueous rechargeable lithium batteries.