A Mapping of the Physical and Electrochemical Properties of Composite Lithium‐Ion Batteries Anodes Made from Graphite, Sn, and Si

PRIMO, EMILIANO N.; BARRACO, DANIEL E.; BRACAMONTE, M. VICTORIA; THOMAS, JORGE; SMREKAR, SACHA; LUQUE, GUILLERMINA L.; LEIVA, EZEQUIEL; PRIMO, EMILIANO N.; BARRACO, DANIEL E.; BRACAMONTE, M. VICTORIA; THOMAS, JORGE; SMREKAR, SACHA; LUQUE, GUILLERMINA L.; LEIVA, EZEQUIEL

Batteries & Supercaps

Wiley

Lugar: Amsterdam; Año: 2020 vol. 3 p. 1248 - 1256

2566-6223

Nowadays, there is an evident need to improve thecurrent Li-ion battery systems, in order to make them more reliable,durable and safe. Regarding this objective, the application ofcomposite materials ?based mainly on the combination of Si, Sn andcarbon? appears as a very promising alternative for future anodematerials. However, despite the great amount of publications dealingwith this topic, there is not a systematic study that allows interpretingand understanding how the combination of these materials affectsthe electrochemical performance of the anodes prepared with them.In light of this necessity, in this work we propose a straightforwardball-milling procedure to prepare Sn/Si/graphite composites withdifferent mass proportions of each material. For all compositions, asystematic study was performed in order to determine how eachmaterial affects the specific capacity, capacity fading and stabilitytowards a change in loading current. It is concluded that the materialprepared with Sn33Si33C33 appears to be the most promising one,delivering a reversible capacity of 906.9 mAh g-1 even after 120cycles at 0.5 A g-1, thus encouraging the development of newcomposites based on these materials for industrial applications.