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)

Data:	2019
Resum:	Lithium ion capacitor (LIC) is a promising energy storage system that can simultaneously provide high energy with high rate (high power). Generally, LIC is fabricated using capacitive cathode (activated carbon, AC) and insertion-type anode (graphite) with Li-ion based organic electrolyte. However, the limited specific capacities of both anode and cathode materials limit the performance of LIC, in particular energy density. In this context, we have developed "two in one" synthetic approach to engineer both cathode and anode from single precursor for high performance LIC. Firstly, we have engineered a low cost 1D polypyrrole nanopipes (PPy-NPipes), which was utilized as cathode material and delivered a maximum specific capacity of 126 mAh/g, far higher than that of conventional AC cathodes (35 mAh/g). Later, N doped carbon nanopipes (N-CNPipes) was derived from direct carbonization of PPy-NPipes and successfully applied as anode material in LIC. Thus, a full LIC was fabricated using both pseudo-capacitive cathode (PPy-NPipes) and anode (N-CNPipes) materials, respectively. The cell delivered a remarkable specific energy of 107 Wh/kg with maximum specific power of 10 kW/kg and good capacity retention of 93 % over 2000 cycles. Thus, this work provide a new approach of utilization of nanostructured conducting polymers as a promising pseudocapacitive cathode for high performance energy storage systems.
Ajuts:	Ministerio de Economía y Competitividad SEV-2013-0295
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Polypyrrole cathode ; High energy density ; Lithium ion capacitor
Publicat a:	Energy technology (Weinheim), Vol. 7, Issue 2 (February 2019) , p. 193-200, ISSN 2194-4296

DOI: 10.1002/ente.201800551

Postprint 22 p, 937.4 KB

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