Significant research has been given towards synthesis and characterisation of electrolyte materials with high proton conductivity for intermediate temperature range (200-600°C) fuel cells. This proposal focused on in-situ study of proton conductivity during neutron diffraction experiment as a function of temperature on dried and pre-dueterated perovskite oxides BaZr0.5In0.5O3-δ. This in-situ experiment will provide us a comprehensive information and understanding on structure-property relationships.