TY - JOUR
T1 - Fabrication and electrochemical characterization of amorphous lithium iron silicate thin films as positive electrodes for lithium batteries
AU - Quinzeni, I.
AU - Ferrari, S.
AU - Quartarone, E.
AU - Capsoni, D.
AU - Caputo, M.
AU - Goldoni, A.
AU - Mustarelli, P.
AU - Bini, M.
PY - 2014/11/15
Y1 - 2014/11/15
N2 - In this work we reported, for the first time, the preparation by radio frequency sputtering and the electrochemical characterization of Li/M/Si/O thin films (M = Fe, Mn), as positive electrodes for lithium microbatteries. The deposited films were amorphous both in case of pure iron and mixed iron/manganese compositions. The electrochemical performances, in terms of capacity values and coulombic efficiency, were comparable to those currently reported for the corresponding crystalline bulk materials. In particular, capacities of the order of 50 mAh g-1 were obtained at 2.5 C with coulombic efficiency near 90% by using a standard liquid electrolyte. Our preliminary electrochemical results, together with the easiness of preparation, suggested that Li/M/Si/O thin films could be interesting candidates as cathodes in lithium microbatteries.
AB - In this work we reported, for the first time, the preparation by radio frequency sputtering and the electrochemical characterization of Li/M/Si/O thin films (M = Fe, Mn), as positive electrodes for lithium microbatteries. The deposited films were amorphous both in case of pure iron and mixed iron/manganese compositions. The electrochemical performances, in terms of capacity values and coulombic efficiency, were comparable to those currently reported for the corresponding crystalline bulk materials. In particular, capacities of the order of 50 mAh g-1 were obtained at 2.5 C with coulombic efficiency near 90% by using a standard liquid electrolyte. Our preliminary electrochemical results, together with the easiness of preparation, suggested that Li/M/Si/O thin films could be interesting candidates as cathodes in lithium microbatteries.
KW - Cyclic voltammetry
KW - Lithium microbattery
KW - Thin film
KW - XPS
KW - r.f. sputtering
UR - http://www.scopus.com/inward/record.url?scp=84901776081&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2014.05.012
DO - 10.1016/j.jpowsour.2014.05.012
M3 - Article
AN - SCOPUS:84901776081
SN - 0378-7753
VL - 266
SP - 179
EP - 185
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -