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oai:riubu.ubu.es:10259/113662026-02-17T11:22:54Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823

Ventosa Arbaizar, Edgar Xia, Wei Klink, Stefan La Mantia, Fabio Muhler, Martin Schuhmann, Wolfgang 2026-02-16T15:50:37Z 2026-02-16T15:50:37Z 2012-01 0013-4686 https://hdl.handle.net/10259/11366 10.1016/j.electacta.2011.12.128 Commercial carbon cloth made of PAN-based carbon fibres was used as free-standing anode for lithium intercalation. The role of surface functional groups on the specific irreversible charge loss and reversible charge during the intercalation and de-intercalation of lithium ions into carbon cloth has been investigated. Oxygen groups have been introduced by nitric acid vapour treatment and subsequently gradually removed by thermal treatment at different temperatures in He or H2 atmosphere as confirmed by X-ray photoelectron spectroscopy. A clear correlation between the amount of surface-bound oxygen groups and the irreversible specific charge was observed. Three irreversible processes were distinguished during the first cathodic scan: (i) reduction of oxygen groups, (ii) formation of the solid electrolyte interphase (SEI) and (iii) presumably exfoliation. The latter one was only observed for samples with low surface oxygen concentration, and its contribution to the irreversible capacity was small due to the low graphitization degree of the samples. An increased specific reversible charge upon increasing the amount of oxygen-containing groups was observed with the main improvement above 1.5 V. Financial support by the BMBF in the framework of the project “Elektrochemie und Mobilität–Kompetenzverbund Nord (KVN; FKZ: 13N9973) and by the EU and the state NRW in the framework of the HighTech. NRW program for funding of the Center of Electrochemical Sciences–CES is gratefully acknowledged. application/pdf eng Elsevier Electrochimica Acta https://doi.org/10.1016/j.electacta.2011.12.128 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Carbon cloth Surface electrochemistry Lithium batteries Exfoliation SEI formation Química analítica Química Chemistry, Analytic Chemistry Influence of surface functional groups on lithium ion intercalation of carbon cloth info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Electrochimica Acta 65 22 29