A macaroni-like Li sub(1.2)V sub(3)O sub(8) nanomaterial with high capacity for aqueous rechargeable lithium batteries

A macaroni-like Li sub(1.2)V sub(3)O sub(8) nanomaterial was directly prepared through a facile solution route using beta -cyclodextrin ( beta -CD) as a template reagent. Its crystal structure was determined by the X-ray diffraction (XRD) pattern. From the scanning electron microscopy (SEM) and transmission electron microscopy (TEM) micrographs, we observed that the as-prepared Li sub(1.2)V sub(3)O sub(8) material consisted of the aggregated macaroni-like nanoparticles and showed a porous structure. The electrochemical properties of the as-prepared Li sub(1.2)V sub(3)O sub(8) in 1.0 M Li sub(2)SO sub(4) aqueous electrolyte were studied through cyclic voltammograms and charge-discharge measurements. The results revealed that the as-prepared Li sub(1.2)V sub(3)O sub(8) could deliver the initial specific capacities of 189, 140, and 101 mAh g super(-1) at 0.1, 0.5, and 1.0 C, respectively. It suggests that the as-prepared Li sub(1.2)V sub(3)O sub(8) should have an attractive future to be applied in aqueous rechargeable lithium battery (ARLB).