Nano-crystalline LiFePO4 was obtained by heating amorphous nanosized LiFCPO4. The amorphous material was obtained by lithiation of FePO4 synthesized by spontaneous precipitation from equimolar aqueous solutions of Fe(NH4)(2)(SO4)(2).6H(2)O and NH4H2PO4, using hydrogen peroxide as oxidizing agent. The materials were characterized by chemical analysis, TG, DTA, X-ray powder diffraction, SEM and BET. Nanocrystalline LiFePO4 showed very good electrochemical performance delivering about the full theoretical capacity (170 Ah kg(-1)) when cycled at C/10 rate. A capacity fade of about 0.25 % per cycle affected the material upon cycling.
Nano-crystalline LiFePO4 for high-performance Li-ion batteries / Prosini, P. P.; Carewska, M.; Scaccia, S.; Wisniewski, P.; Passerini, S.; Pasquali, Mauro. - STAMPA. - (2003), pp. 161-167. (Intervento presentato al convegno International Symposium on Batteries and Supercapacitors tenutosi a San Francisco CA).
Nano-crystalline LiFePO4 for high-performance Li-ion batteries.
S. PASSERINI;PASQUALI, Mauro
2003
Abstract
Nano-crystalline LiFePO4 was obtained by heating amorphous nanosized LiFCPO4. The amorphous material was obtained by lithiation of FePO4 synthesized by spontaneous precipitation from equimolar aqueous solutions of Fe(NH4)(2)(SO4)(2).6H(2)O and NH4H2PO4, using hydrogen peroxide as oxidizing agent. The materials were characterized by chemical analysis, TG, DTA, X-ray powder diffraction, SEM and BET. Nanocrystalline LiFePO4 showed very good electrochemical performance delivering about the full theoretical capacity (170 Ah kg(-1)) when cycled at C/10 rate. A capacity fade of about 0.25 % per cycle affected the material upon cycling.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
