dc.contributor.author | Moreno Fernández, María de los Ángeles | |
dc.contributor.author | Gómez Urbano, Juan Luis | |
dc.contributor.author | Enterria, Marina | |
dc.contributor.author | Cid Barreno, Rosalía | |
dc.contributor.author | López del Amo, Juan Miguel | |
dc.contributor.author | Mysyk, Roman | |
dc.contributor.author | Carriazo, Daniel | |
dc.date.accessioned | 2021-02-01T10:59:21Z | |
dc.date.available | 2021-02-01T10:59:21Z | |
dc.date.issued | 2020-11-20 | |
dc.identifier.citation | Electrochimica Acta 361 : (2020) // Article ID 136985 | es_ES |
dc.identifier.issn | 0013-4686 | |
dc.identifier.issn | 1873-3859 | |
dc.identifier.uri | http://hdl.handle.net/10810/49972 | |
dc.description.abstract | The mechanisms behind enhanced charge storage of P-functionalized carbons are unraveled for the first time using non-porous graphene oxide treated with phosphoric acid and annealed at either 400 or 800 degrees C. The electrochemical study in 1 M H2SO4 reveals that phosphorus groups boost charge storage and electrochemical stability, with more effect for the higher annealing temperature. Annealing at 800 degrees C also leads to the material withstanding 60,000 charge-discharge cycles with no capacitance loss at 1.5 V. The improvement in the electrochemical performance is shown to be mainly governed by the change in surface chemistry comprehensively studied with NMR, FTIR and XPS characterization techniques. The collective analysis of electrochemical response and surface chemistry demonstrates that enhanced charge storage by phosphorus-functionalized graphene materials is made possible due to the following synergistic mechanisms: i) non-Faradaic charging; ii) nascent hydrogen storage in the interlayer; iii) benzoquinoneto-hydroquinone redox processes; iv) phosphate-to-phosphonate like transformation. From the practical perspective, the stored charge can be boosted due to the higher capacitance upon prior electrochemical activation in the vicinity of oxygen evolution potential and the wider usable electrochemical window enabled by phosphorus-related groups. (C) 2020 The Author(s). Published by Elsevier Ltd. | es_ES |
dc.description.sponsorship | The authors thank the European Union (Graphene Flagship, Core 2, Grant number 785219) and the Spanish Ministry of Science and Innovation (MICINN/FEDER) (RTI2018-096199-B-I00) for the financial support of this work. J. L. G. U. is very thankful to the Spanish Ministry of Education, Science and Universities (MICINN) for the FPU grant (16/03498). We also want to acknowledge the company GRAPHENEA for supplying the graphene oxide used in this work and Yan Zhang from CIC Energigune for collecting FTIR spectra. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/785219 | es_ES |
dc.relation | info:eu-repo/grantAgreement/MICINN/RTI2018-096199-B-I00 | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | * |
dc.subject | phosphorus functionalized graphene oxide | es_ES |
dc.subject | solid state NMR | es_ES |
dc.subject | X-ray photoelectron spectroscopy | es_ES |
dc.subject | charge storage | es_ES |
dc.subject | supercapacitor | es_ES |
dc.subject | doped graphene | es_ES |
dc.subject | electrochemical capacitors | es_ES |
dc.subject | activated carbons | es_ES |
dc.subject | high-performance | es_ES |
dc.subject | electrodes | es_ES |
dc.subject | nitrogen | es_ES |
dc.subject | oxide | es_ES |
dc.subject | monoliths | es_ES |
dc.subject | supercapacitors | es_ES |
dc.title | Understanding enhanced charge storage of phosphorus-functionalized graphene in aqueous acidic electrolytes | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) | es_ES |
dc.rights.holder | Atribución-NoComercial-SinDerivadas 3.0 España | * |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S0013468620313785?via%3Dihub#! | es_ES |
dc.identifier.doi | 10.1016/j.electacta.2020.136985 | |
dc.contributor.funder | European Commission | |
dc.departamentoes | Química inorgánica | es_ES |
dc.departamentoeu | Kimika ez-organikoa | es_ES |