145244 20241015122513.0 doi 10.1038/s43246-021-00119-0 sideral 124030 ART-2021-124030 eng Haro, M. Universidad de Zaragoza (orcid)0000-0001-7246-2149 Nano-vault architecture mitigates stress in silicon-based anodes for lithium-ion batteries 2021 Nanomaterials undergoing cyclic swelling-deswelling benefit from inner void spaces that help accommodate significant volumetric changes. Such flexibility, however, typically comes at a price of reduced mechanical stability, which leads to component deterioration and, eventually, failure. Here, we identify an optimised building block for silicon-based lithium-ion battery (LIB) anodes, fabricate it with a ligand- and effluent-free cluster beam deposition method, and investigate its robustness by atomistic computer simulations. A columnar amorphous-silicon film was grown on a tantalum-nanoparticle scaffold due to its shadowing effect. PeakForce quantitative nanomechanical mapping revealed a critical change in mechanical behaviour when columns touched forming a vaulted structure. The resulting maximisation of measured elastic modulus (similar to 120GPa) is ascribed to arch action, a well-known civil engineering concept. The vaulted nanostructure displays a sealed surface resistant to deformation that results in reduced electrode-electrolyte interface and increased Coulombic efficiency. More importantly, its vertical repetition in a double-layered aqueduct-like structure improves both the capacity retention and Coulombic efficiency of the LIB. Lithiation of anodes during cycling of lithium-ion batteries generates stresses that reduce operation lifetime. Here, a composite silicon-based anode with a nanoscale vaulted architecture shows high mechanical stability and electrochemical performance in a lithium-ion battery. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/MICINN/PID2019-108247RA-I00 info:eu-repo/grantAgreement/ES/MICINN/RYC-2018-025222-I info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 4.0 2021 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Kumar, P. Zhao, J.L. Koutsogiannis, P. Porkovich, A.J. Ziadi, Z. Bouloumis, T. Singh, V. Juarez-Perez, E.J. (orcid)0000-0001-6040-1920 Toulkeridou, E. Nordlund, K. Djurabekova, F. Sowwan, M. Grammatikopoulos, P. 2012 755 Universidad de Zaragoza Dpto. Química Física Área Química Física 2, 1 (2021), 16 [10 pp] Commun. mater. Communications materials 2662-4443 2059414 http://zaguan.unizar.es/record/145244/files/texto_completo.pdf Versión publicada 1790608 http://zaguan.unizar.es/record/145244/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:145244 articulos driver 2024-10-15-10:50:40 ARTICLE