Poly(ethylene oxide)–Li1.5Al0.5Ge1.5(PO4)3 hybrid electrolytes were prepared by solution casting and solvent-free melt processing. Melt processing improved ceramic particle distribution. Residual solvent reduced stability with lithium metal.
Tailored calcination and sintering processes influence the microstructure and ionic conductivity of LAGP electrolytes. Optimized LAGP_700 shows improved conductivity and cycling performance.
In operando Raman microscopy has revealed that the reduction of Li1.5Al0.5Ge1.5(PO4)3 (LAGP) to Ge particles surrounded by Li-phosphates occurs in reaction hotspots at the Cu/LAGP interface.
Polyether/Li1+xAlxGe2−x(PO4)3 hybrid electrolytes were investigated to assess the effect of inorganic crystallinity, and exhibited low-temperature ionic conductivity and reduced grain boundary resistance.
We compare the reaction kinetics of SEI formation between Li metal and the SEs LAGP and LGPS using a VEP-XPS technique. Our results show that the SEI growth between Li and LAGP exhibits faster kinetics, preventing the plating of metallic Li.