Asymmetric supercapacitors based on hybrid CuO@reduced graphene oxide@sponge versus reduced graphene oxide@sponge electrodes
| dc.contributor.author | Dubal, D. | |
| dc.contributor.author | Chodankar, N. | |
| dc.contributor.author | Gund, G. | |
| dc.contributor.author | Holze, R. | |
| dc.contributor.author | Lokhande, C. | |
| dc.contributor.author | Gomez-Romero, P. | |
| dc.date.issued | 2015 | |
| dc.description.abstract | An asymmetric supercapacitor was fabricated by using CuO@reduced graphene oxide@sponge (CuO@rGO@SP) composites as the positive electrode and rGO@SP as the negative electrode in Na2SO4 aqueous electrolyte. Macroporous and low‐costing sponges were explored as skeletons to construct a homogeneous 3 D interconnected network of rGO. Initially, rGO was deposited on the sponge by the “dip‐and‐dry” method. Subsequently, a CuO nanosheet cluster was deposited by using the chemical bath deposition method on the rGO‐coated sponge substrate. The CuO@rGO@SP electrodes could be operated even under a high scan rate of 200 mV s−1 and exhibited a maximum specific capacitance of 519 F g−1. An asymmetric supercapacitor device based on CuO@rGO@SP//rGO@SP could be cycled in the high voltage range of 1.7 V and displayed high specific capacitance of 77.84 F g−1 and a high energy density of 31.24 W h−1 kg−1. Impressively, this asymmetric device exhibited an excellent long cycle life and 83 % of the specific capacitance was retained after 2000 cycles. | |
| dc.description.statementofresponsibility | Deepak P. Dubal, Nilesh R. Chodankar, Girish S. Gund, Rudolf Holze, Chandrakant D. Lokhande and Pedro Gomez-Romero | |
| dc.identifier.citation | Energy Technology: generation, conversion, storage, distribution, 2015; 3(2):168-176 | |
| dc.identifier.doi | 10.1002/ente.201402170 | |
| dc.identifier.issn | 2194-4288 | |
| dc.identifier.issn | 2194-4296 | |
| dc.identifier.uri | http://hdl.handle.net/2440/115654 | |
| dc.language.iso | en | |
| dc.publisher | Wiley | |
| dc.rights | © 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim | |
| dc.source.uri | https://doi.org/10.1002/ente.201402170 | |
| dc.subject | Copper; electrochemistry; graphene; sponges; supercapacitors | |
| dc.title | Asymmetric supercapacitors based on hybrid CuO@reduced graphene oxide@sponge versus reduced graphene oxide@sponge electrodes | |
| dc.type | Journal article | |
| pubs.publication-status | Published |