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The development and the characterization of a nanostructured binder-free anode for lithium-ion batteries exploiting the germanium high theoretical specific capacity (1624 mAh g−1 for Li22Ge5 alloy) is herein presented. This anode secures remarkable performances in different working conditions attaining a 95% capacity retention at 1C (i.e., 1624 mA g−1) after 1600 cycles at room temperature and a specific capacity of 1060 mAh g−1 at 10C and 450 mAh g−1 at 60C. The nanostructured binder-free germanium-based anode shows also strong resilience in terms of temperature tests, being it tested from -30°C to +60°C. Indeed, the specific capacity remains unaltered from room temperature up to +60°C, while at 0°C the cell is still retaining 85% of its room temperature capacity. In a full-cell configuration with LiFePO4 as cathode, the Ge anode showed a stable specific capacity above 1300 mAh g−1 for 35 cycles at C …
Publication date: 
4 Jan 2022

S Fugattini, U Gulzar, A Andreoli, L Carbone, M Boschetti, P Bernardoni, M Gjestila, G Mangherini, R Camattari, T Li, S Monaco, M Ricci, S Liang, D Giubertoni, G Pepponi, P Bellutti, M Ferroni, L Ortolani, V Morandi, D Vincenzi, R Proietti Zaccaria

Biblio References: 
Pages: 139832
Electrochimica Acta