1. Institute for Clean Energy and Advanced Materials School of Materials and EnergySouthwest University Chongqing 400715 P. R. China
2. Electronic & Magnetic Materials Department Advanced Materials DivisionCentral Metallurgical Research and Development Institute (CMRDI) Helwan, P.O. Box 87 Cairo 11421 Egypt
3. Mining and Metallurgy Engineering DepartmentTabbin Institute for Metallurgical Studies (TIMS) Tabbin, Helwan 109 Cairo 11421 Egypt
4. Energy Materials Laboratory (EML) School of Sciences and EngineeringThe American University in Cairo New Cairo 11835 Egypt