Nano-vault architecture mitigates stress in silicon-based anodes for lithium-ion batteries

Haro，Marta1,2; Kumar，Pawan1; Zhao，Junlei3,4; Koutsogiannis，Panagiotis1; Porkovich，Alexander James1; Ziadi，Zakaria1; Bouloumis，Theodoros1; Singh，Vidyadhar1,5; Juarez-Perez，Emilio J.2,6; Toulkeridou，Evropi7; Nordlund，Kai3; Djurabekova，Flyura3; Sowwan，Mukhles1; Grammatikopoulos，Panagiotis1,8

2021-12-01

10.1038/s43246-021-00119-0

Communications Materials   影响因子和分区

2662-4443

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.

ESCI ; EI

英语

其他

WOS:000617527000001

20210709930646

Amorphous silicon ; Anodes ; Deterioration ; Efficiency ; Electrolytes ; Mechanical stability ; Scaffolds ; Silicon batteries ; Surface resistance

Construction Equipment:405.1 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Electric Batteries and Fuel Cells:702 ; Electric Batteries:702.1 ; Electron Tubes:714.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Production Engineering:913.1 ; Materials Science:951

2-s2.0-85107945380

Scopus

1.Nanoparticles by Design Unit,Okinawa Institute of Science and Technology (OIST) Graduate University,Okinawa,Japan
2.Instituto de Nanociencia y Materiales de Aragón (INMA),CSIC-Universidad de Zaragoza,Zaragoza,Spain
3.Department of Physics and Helsinki Institute of Physics,University of Helsinki,Helsinki,Finland
4.Department of Electrical and Electronic Engineering,Southern University of Science and Technology (SUSTech),Shenzhen,China
5.Department of Physics,Jai Prakash University,Chapra,India
6.Aragonese Foundation for Research & Development (ARAID),Government of Aragon,Zaragoza,Spain
7.Okinawa Institute of Science and Technology (OIST) Graduate University,Okinawa,Japan
8.Particle Technology Laboratory,Institute of Process Engineering,Department of Mechanical and Process Engineering,ETH Zürich,Zürich,Switzerland

Haro，Marta,Kumar，Pawan,Zhao，Junlei,et al. Nano-vault architecture mitigates stress in silicon-based anodes for lithium-ion batteries[J]. Communications Materials,2021,2(1).

Haro，Marta.,Kumar，Pawan.,Zhao，Junlei.,Koutsogiannis，Panagiotis.,Porkovich，Alexander James.,...&Grammatikopoulos，Panagiotis.(2021).Nano-vault architecture mitigates stress in silicon-based anodes for lithium-ion batteries.Communications Materials,2(1).

Haro，Marta,et al."Nano-vault architecture mitigates stress in silicon-based anodes for lithium-ion batteries".Communications Materials 2.1(2021).