TY - JOUR
T1 - Nano-vault architecture mitigates stress in silicon-based anodes for lithium-ion batteries
AU - Haro, Marta
AU - Kumar, Pawan
AU - Zhao, Junlei
AU - Koutsogiannis, Panagiotis
AU - Porkovich, Alexander James
AU - Ziadi, Zakaria
AU - Bouloumis, Theodoros
AU - Singh, Vidyadhar
AU - Juarez-Perez, Emilio J.
AU - Toulkeridou, Evropi
AU - Nordlund, Kai
AU - Djurabekova, Flyura
AU - Sowwan, Mukhles
AU - Grammatikopoulos, Panagiotis
N1 - Publisher Copyright:
© 2021, The Author(s).
PY - 2021/12
Y1 - 2021/12
N2 - 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 (~120 GPa) 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.
AB - 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 (~120 GPa) 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.
UR - http://www.scopus.com/inward/record.url?scp=85107945380&partnerID=8YFLogxK
U2 - 10.1038/s43246-021-00119-0
DO - 10.1038/s43246-021-00119-0
M3 - 文章
AN - SCOPUS:85107945380
SN - 2662-4443
VL - 2
JO - Communications Materials
JF - Communications Materials
IS - 1
M1 - 16
ER -