Sulfur-doped cobalt phosphide nanotube arrays for highly stable hybrid supercapacitor Research Authors Abdelnaby M Elshahawy, Cao Guan, Xin Li, Hong Zhang, Yating Hu, Haijun Wu, Stephen J Pennycook, John Wang Research Department Department of physics Research Journal Nano Energy Research Member Abdelnaby Mohamed Kotb Elshahawy Research Year 2017