Strategy to Enhance the Cycling Stability of the Metallic Lithium Anode in Li-Metal Batteries.

Based on the analysis of systematic research (density functional theory calculations, physical characterizations, and electrochemical performances), here, we report a novel mixture surface modification layer of LiC&LiF, which can enhance the lithium-ion diffusion and decrease the local current density. This is beneficial to the improvement of cycling stability. As a result, the Li@LiC&LiF-5/NCM half-cell possesses an excellent capacity retention of 94% after 100 cycles at 0.

Asymmetric Structure Design of Electrolytes with Flexibility and Lithium Dendrite-Suppression Ability for Solid-State Lithium Batteries.

Solid polymer electrolytes can be used to construct solid-state lithium batteries (SSLBs) using lithium metals as the anode. However, the lifespan and safety problems of SSLBs caused by lithium dendrite growth have hindered their practical application. Here, we have designed and prepared a rigid-flexible asymmetric solid electrolyte (ASE) that is used in building SSLBs.

3D web freestanding RuO-CoO nanowires on Ni foam as highly efficient cathode catalysts for Li-O batteries.

The mechanism of Li-O batteries is based on the reactions of lithium ions and oxygen, which hold a theoretical higher energy density of approximately 3500 W h kg. In order to improve the practical specific capacity and cycling performance of Li-O batteries, a catalytically active mechanically robust air cathode is required. In this work, we synthesized a freestanding catalytic cathode with RuO decorated 3D web CoO nanowires on nickel foam.