Abstract
LiNi0.5Mn1.5O4 (LNMO) and V2O5-modified LNMO materials with P4332 structure were prepared by ethanol assisted co-precipitation process. The discharge capacities of V2O5-coated LiNi0.5Mn1.5O4 is 131.4, 122, 111.1 93.8 and 52.1 mAh g−1 at 0.2, 0.5, 1, 2 and 5 C charge-discharge rates, respectively. The discharge capacities of pristine LNMO are only 125.7, 107.3, 86.2, 69.7 and 37.6 mAh g−1 at homologous rates. The V2O5 modification can be considered as an efficient way to enhance the rate capability of LNMO. The improved rate capability of V2O5-coated LNMO material could be ascribed to the enhanced lithium-ions diffusion coefficient and reduced charge-transfer reaction resistance.
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