Abstract
In this study, nanoporous zirconia (ZrO 2) and titania (TiO 2) coatings are shown to stabilize the cycling performance of lithium-ion batteries with LiMn 2O 4 spinel cathodes. The effect of firing temperature on the coating pore size is discussed and the resulting performance of the coated cathodes is evaluated. Stabilization mechanisms, such as neutralization of acidic electrolytes by ZrO 2 and TiO 2 coatings, are examined. It is proposed that the establishment of a complex nanoporous network for lithium-ion transport results in a more uniform current distribution at the particle surface, thereby suppressing capacity fade that may be associated with surface instabilities of the spinel electrode.
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