Effects of Li conduction on the capacity utilization of cathodes in all-solid-state lithium batteries.

Li conduction in all-solid-state lithium batteries is limited compared with that in lithium-ion batteries based on liquid electrolytes because of the lack of an infiltrative network for Li transportation. Especially for the cathode, the practically available capacity is constrained due to the limited Li diffusivity. In this study, all-solid-state thin-film lithium batteries based on LiCoO thin films with varying thicknesses were fabricated and tested.

Improved Cycling Stability of LiCoO at 4.5 V via Surface Modification of Electrodes with Conductive Amorphous LLTO Thin Film.

The stability issue of LiCoO cycled at high voltages is one of the burning questions for the development of lithium ion batteries with high energy density and long cycling life. Although it is effective to improve the cycling performance of LiCoO via coating individual LiCoO particles with another metal oxides or fluorides, the rate capacity is generally compromised because the typical coating materials are poor conductors. Herein, amorphous LiLaTiO, one of the most successful solid electrolytes, was directly deposited on the surface of made-up LiCoO electrodes through magnetron sputtering.

Surface Modification of Silicon Nanoparticles by an "Ink" Layer for Advanced Lithium Ion Batteries.

Owing to its high specific capacity, silicon is considered as a promising anode material for lithium ion batteries (LIBs). However, the synthesis strategies for previous silicon-based anode materials with a delicate hierarchical structure are complicated or hazardous. Here, Prussian blue analogues (PBAs), widely used in ink, are deposited on the silicon nanoparticle surface (PBAs@Si-450) to modify silicon nanoparticles with transition metal atoms and a N-doped carbon layer.