Amorphous Li₄Ti₅O₁₂ Thin Film with Enhanced Lithium Storage Capability and Reversibility for Lithium-Ion Batteries

This manuscript focuses on how to improve the electronic conductivity and lithium-ion diffusivity of Li₄Ti₅O₁₂ thin films, which present a serious constraint to the development of the solid-state lithium-ion batteries. Given this understanding, we have found that creating amorphous structural features and hierarchical channels of thin films form a very simple yet effective approach to solve the problem. The unique structural features and high electrical conductivity of the as-prepared thin films result in high capacity (283.5mAhg^-1 at 10μAcm^-2) and good cyclic stability (≈3% capacity loss after 100cycles at 10μAcm^-2). These important findings could open up new opportunities for Li₄Ti₅O₁₂ in constructing high-performance binder-free energy storage devices.