Influences on power performances of metal oxide additives for LiFePO4 electrodes

Metal oxide additives are added into LiFePO4 electrodes attempting to improve cell power performances. Electrochemical performances are tested with 5 wt% different sizes of neutral alumina, nano Al2O3, and nano MgO individually comparing with those with 5 wt% more active LiFePO4 and acetylene black. The polarization between charge and discharge plateaus is reduced not only by adding more conductive acetylene black, but also by adding all these insulated metal oxide additives. Adding natural alumina and nano MgO can significantly increase rate capacities. This might be because of their lithium ion saver effect.