Polypyrrole Nanopipes as a Promising Cathode Material for Li-ion Batteries and Li-ion Capacitors : Two-in-One Approach - Dubal, Deepak P. (Institut Català de Nanociència i Nanotecnologia) ; Jagadale, Ajay (SASTRA Deemed University. Department of Electrical and Electronics Engineering) ; Chodankar, Nilesh R. (Chonnam National University) ; Kim, Do-Heyoung (Chonnam National University) ; Gómez-Romero, Pedro 1959- (Institut Català de Nanociència i Nanotecnologia) ; Holze, Rudolf (Technische Universität Chemnitz. Institut für Chemie)