Borohydride Substitution Effects of Li<sub>6</sub>PS<sub>5</sub>Cl Solid Electrolyte
Heng Wang, Ling Gao, Zhaoxin Lu, Ya Tang, Daixin Ye, Guowei Zhao, Hongbin Zhao, Jiujun Zhang
Abstract
We report an electrochemically stable borohydride (BH4–)-substituted Li-argyrodite solid electrolyte prepared by a mechanical ball-milling method. The crystal structure of BH4–-substituted argyrodite remains unchanged with x < 0.3 (Li6PS5Cl1–x(BH4)x), whereas a complex phase (Li2S-P2S5-LiCl-LiBH4) was obtained with x > 0.3. The highest ionic conductivity of 0.12 mS cm–1 at 25 °C was observed with x = 0.1 in Li6PS5Cl1–x(BH4)x, whereas there was virtually no change in the complex phase. The electrochemical window of Li6PS5Cl0.9(BH4)0.1 is between 1 and 4 V against lithium metal.
Topics & Concepts
BorohydrideIonic conductivityElectrolyteElectrochemistryInorganic chemistryElectrochemical windowCrystal structureMaterials scienceMetalConductivitySodium borohydrideFast ion conductorPhase (matter)ChemistryCrystallographyPhysical chemistryMetallurgyElectrodeCatalysisOrganic chemistryHydrogen Storage and MaterialsAdvanced Battery Materials and TechnologiesChemical Synthesis and Characterization