A porous LiAl 0.1 Mn 1.9 O 4 (P-LAMO) spinel was prepared by a phase-inversion process followed by calcined at 700°C for 6h 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 1.0moll −1 Li 2 SO 4 aqueous electrolyte, it can deliver the capacities of 117, 113, 104 and 88mAhg −1 at the rates of 1, 5, 10 and 20C at room temperature, respectively. Even charged at 60 C, it is still able to deliver a capacity of 113mAhg −1 at 1C with a coulomb efficiency of 98%. The results suggest that the product could be a promising cathode material for aqueous rechargeable lithium batteries.