Enhanced Li<sub>1+<i>x</i></sub>Al<sub><i>x</i></sub>Ge<sub>2–<i>x</i></sub>(PO<sub>4</sub>)<sub>3</sub> Anode-Protecting Membranes for Hybrid Lithium–Air Batteries by Spark Plasma Sintering
Guang Yang, Dorsasadat Safanama, Kia Chai Phuah, Stefan Adams
Abstract
with a compactness of 97% and nearly single-crystalline particles. Our solid-state NMR results, X-ray diffraction studies, and scanning electron microscopy micrographs confirm that the achievable ionic conductivity is controlled by the retention of the Al dopant within the LAGP phase, necking between particles, and the minimization of grain boundaries between crystallites within a particle. To benchmark the performance of our spark plasma-sintered solid electrolyte membranes over conventionally prepared LAGP, we demonstrate their favorable performance in hybrid Li-air batteries. The highest energy efficiency is achieved for the fastest ion-conducting membrane sintered at 750 °C.
Topics & Concepts
Materials scienceIonic conductivitySpark plasma sinteringSinteringMembraneAnalytical Chemistry (journal)ElectrolyteConductivityDopantScanning electron microscopeFast ion conductorChemical engineeringComposite materialDopingChemistryPhysical chemistryElectrodeChromatographyOptoelectronicsBiochemistryEngineeringAdvanced Battery Materials and TechnologiesAdvancements in Battery MaterialsInorganic Chemistry and Materials