RT info:eu-repo/semantics/article
T1 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
A1 García-Quismondo, Enrique
A1 Alvarez-Conde, Sandra
A1 García, Guzmán
A1 Medina-Santos, Jesús I.
A1 Palma, Jesús
A1 Ventosa Arbaizar, Edgar
K1 Cycle life
K1 Solid electrolyte interphase (SEI)
K1 Protecting character
K1 Coulometry method
K1 Redox mediator
K1 Química analítica
K1 Chemistry, Analytic
AB The formation of a protecting nanolayer, so-called solidelectrolyte interphase (SEI), on the negative electrode of Li-ion batteries(LIBs) from product precipitation of the cathodic decomposition of theelectrolyte is a blessing since the electrically insulating nature of thisnanolayer 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 isessential for LIBs to achieve a long cycle life. Unfortunately, theevaluation of this critical property of the SEI is not trivial. Herein, a new,cheap, and easily implementable methodology, the redox-mediatedenhanced coulometry, is presented to estimate the protecting quality ofthe SEI. The key element of the methodology is the addition of a redoxmediator in the electrolyte during the degassing step (after the SEIformation cycle). The redox mediator leads to an internal self-discharge process that is inversely proportional to the protectingcharacter of the SEI. Also, the self-discharge process results in an easily measurable decrease in Coulombic efficiency. The influenceof vinylene carbonate as an electrolyte additive in the resulting SEI is used as a case study to showcase the potential of the proposedmethodology.
PB American Chemical Society
SN 1944-8244
YR 2022
FD 2022-09
LK http://hdl.handle.net/10259/7406
UL http://hdl.handle.net/10259/7406
LA eng
NO 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.
DS Repositorio Institucional de la Universidad de Burgos
RD 05-may-2024