Preparation, Characterization and Conductivity of Li3N, Li3P and Li3As

摘要: The superionic conductors lithium nitride and phosphide the semi-metallic conductor arsenide were synthesized through elemental reactions of melt with nitrogen gas phosphorus or arsenic powders. A high mobility ion was found in this class compounds. These compounds are hard brittle have a dark brown color. structures these studied using x-ray diffraction techniques. All three crystallize hexagonal structure P6/mm space group. lattice dimensions expand anisotropically as size anion increases. ionic electronic conductivities reversible electrodes an blocking molybdenum electrode. temperature dependent conductivity measurements (Arrhenius plot) show negligible for both phosphide. However, shows behavior conductivity. higher degree covalency ct direction more character x-y plane observed. anisotropic nature chemical bonds provides shallow potential well allows correlated motion ions. Lithium useful materials application batteries sensors. decomposes below 0.5 volts can be used low voltage zero current devices. is stable up to 2.2 decompose contact water air sensitive.