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oai:riubu.ubu.es:10259/114022026-02-19T01:05:49Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823

Exceeding 6500 cycles for LiFePO4/Li metal batteries through understanding pulsed charging protocols García, Grecia Dieckhöfer, Stefan Schuhmann, Wolfgang Ventosa Arbaizar, Edgar Química Química analítica Chemistry Chemistry, Analytic Improving the performance of Li metal anodes is of key importance for the next generation high energy-density batteries. Here, we study an easily implementable strategy for prolonging the cycle stability of Li metal anodes that is based on the application of pulsed charging protocols. Introducing short periods of relaxation without current flow allows the concentration of Li+ ions to be replenished in front of the electrode surface promoting a uniform and efficient plating of Li metal. We demonstrate that the cycle life of LiFePO4/Li metal batteries is prolonged from 700 to more than 6500 cycles at high charge-rates. In contrast to the assumed failure due to Li dendrite formation, we show that the proposed potential pulse protocols mitigate the growth of a porous film within the Li metal electrode which appears to be responsible for the battery failure. Financial support from the Deutsche Forschungsgemeinscha in the framework of the Cluster of Excellence “RESOLV” (EXC 1069) and Comunidad de Madrid in the framework of the talent attraction programme (2017-T1/AMB-5190) is gratefully acknowledged. G. G. is grateful for a PhD scholarship from the International Max-Planck Research School for Surface and Interface Engineering in Advanced Materials (IMPRS-SurMat). 2026-02-18T12:45:05Z 2026-02-18T12:45:05Z 2018-02 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion 2050-7488 https://hdl.handle.net/10259/11402 10.1039/C8TA00962G 2050-7496 eng Journal of Materials Chemistry A. 2018, V. 6, n. 11, p. 4746-4751 https://doi.org/10.1039/C8TA00962G info:eu-repo/semantics/openAccess application/pdf Royal Society of Chemistry https://riubu.ubu.es/bitstream/10259/11402/3/Garc%c3%ada-jmca_2018.pdf.jpg Hispana TEXT http://rightsstatements.org/vocab/CNE/1.0/ RIUBU. Repositorio Institucional de la Universidad de Burgos https://hdl.handle.net/10259/11402