Moussa, M.Al-Bataineh, S.A.Losic, D.Dubal, D.P.2020-01-202020-01-202019Applied Materials Today, 2019; 16:425-4342352-94072352-9407http://hdl.handle.net/2440/122787Potassium (K) ion storage technology is recently receiving a great attention due to their low-cost and enormous abundance on the earth compared to lithium. However, the technology is still at a scientific research stage and exploring suitable electrode materials is a key challenge. Herein, we have engineered nitrogen doped carbon nanotubes (N-CNTs) as a promising anode material for K-ion storage through pyrolytic decomposition of polyaniline nanotubes (PAni-NTs). These N-CNTs delivers high reversible capacity with good rate performance and cycling stability. Taking advantage of these features, a potassium-ion hybrid capacitor (KIHC) is constructed using N-CNTs as battery-type anode and 3-dimensional (3D) laser scribed graphene (LSG) as capacitor-type cathode electrodes. The device displays a high energy density of 65 W h/kg, a high power output of 1000 W/kg, as well as a long cycling life (91% capacity retention over 5000 cycles). Thus, such an advanced energy storage system can satisfy the requirements of high power and high energy densities simultaneously in diverse applications at low-cost.en© 2019 Elsevier Ltd. All rights reserved.N-doped carbon nanotubes; graphene; potassium-ion-capacitorJournal article003013282510.1016/j.apmt.2019.07.0030004872886000362-s2.0-85070231123492782Moussa, M. [0000-0001-5890-0851]Losic, D. [0000-0002-1930-072X]Dubal, D.P. [0000-0002-2337-676X]