Enhancement of the high-rate capability of solid-state lithium batteries by nanoscale interfacial modification

The enhancement of the high-rate capability of solid-state Lithium Batteries by nanoscale interfacial modification, was analyzed. The surface of LiCoO₂ with Li₄Ti₅O₁₂ was coated by spray coating. When the sulfide electrolytes were in contact with the oxide electrodes, the large difference between their chemical potentials make their Li⁺ ions transfer from the sulfide electrolytes to the oxide electrodes. Electrochemical impedance spectroscopy demonstrated the reduction of the interfacial resistance by the interposition of Li₄Ti ₅O₁₂. Developed space-charge layer on the sulfide side and very large interfacial resistance improved the high-rate capability of solid-state lithium batteries. This enhancement of capability supports the practical application of solid-state lithium batteries and, hence provides a solution to the safety concerns of lithium batteries.