2026-06-18T03:23:35Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/74062023-03-27T08:16:38Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823

García-Quismondo, Enrique Alvarez-Conde, Sandra García, Guzmán Medina-Santos, Jesús I. Palma, Jesús Ventosa Arbaizar, Edgar 2023-02-07T09:18:02Z 2023-02-07T09:18:02Z 2022-09 1944-8244 http://hdl.handle.net/10259/7406 10.1021/acsami.2c11992 1944-8252 The formation of a protecting nanolayer, so-called solid electrolyte interphase (SEI), on the negative electrode of Li-ion batteries (LIBs) from product precipitation of the cathodic decomposition of the electrolyte is a blessing since the electrically insulating nature of this nanolayer protects the electrode surface, preventing continuous electrolyte decomposition and enabling the large nominal cell voltage of LIBs, e.g., 3.3−3.8 V. Thus, the protection performance of the nanolayer SEI is essential for LIBs to achieve a long cycle life. Unfortunately, the evaluation of this critical property of the SEI is not trivial. Herein, a new, cheap, and easily implementable methodology, the redox-mediated enhanced coulometry, is presented to estimate the protecting quality of the SEI. The key element of the methodology is the addition of a redox mediator in the electrolyte during the degassing step (after the SEI formation cycle). The redox mediator leads to an internal self-discharge process that is inversely proportional to the protecting character of the SEI. Also, the self-discharge process results in an easily measurable decrease in Coulombic efficiency. The influence of vinylene carbonate as an electrolyte additive in the resulting SEI is used as a case study to showcase the potential of the proposed methodology. The author acknowledges the financial support from the Spanish Government (MINECO) through the Research Challenges Programme (Grant RTI2018-099228-A-I00) and Ramón y Cajal award (RYC2018-026086-I) as well as the NanoBat project. NanoBat has received funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement no. 861962. application/pdf eng American Chemical Society ACS Applied Materials & Interfaces. 2022, V. 14, n. 38, p. 43319-43327 https://doi.org/10.1021/acsami.2c11992 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-099228-A-I00/ES/BATERIAS INJECTABLES DE ELECTRODES SEMI-SOLIDOS/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RYC2018-026086-I/ES/ info:eu-repo/grantAgreement/EC/H2020/861962/EU/GHz nanoscale electrical and dielectric measurements of the solid-electrolyte interface and applications in the battery manufacturing line/NanoBat/ Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Cycle life Solid electrolyte interphase (SEI) Protecting character Coulometry method Redox mediator Química analítica Chemistry, Analytic New Technique for Probing the Protecting Character of the Solid Electrolyte Interphase as a Critical but Elusive Property for Pursuing Long Cycle Life Lithium-Ion Batteries info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion ACS Applied Materials & Interfaces 14 38 43319 43327