Junlei Qi

Ultrafast laser direct welding of sapphire: interfacial microstructure, joining mechanism and optical performance optimization

Sapphire is critically important for ultraviolet photodetectors, high-temperature sensors and optical windows. Traditional brazing and diffusion bonding suffer from integral heating, structural deformation and optical performance degradation. In this work, an innovative interlaye...

Strengthening the BZCYYb electrolyte/cathode interface for protonic ceramic fuel cells via Ni doping and in situ exsolution

A reliable electrolyte/electrode interface is crucial to the performance of protonic ceramic fuel cells (PCFCs), yet the poor sinterability of proton-conducting electrolytes and their limited interfacial bonding with cathodes remain challenging. This study proposes a synergistic...