H. Morimoto et al., Anode properties of amorphous 50SiO center dot 50SnO powders synthesized by mechanical milling, EL SOLID ST, 4(2), 2001, pp. A16-A18
Amorphous 50SiO . 50SnO (mol %) powders were synthesized by mechanical mill
ing treatment of starting materials SiO and SnO in a dry N-2 atmosphere at
room temperature. The resultant powders were used in a rechargeable cell, L
i/1 M LiPF6, ethylene carbonate+diethylene carbonate/50SiO . 50SnO. For the
first discharge at a current density of 1.5 mA cm(-2), the high capacity o
ver 800 mAh g(-1) was obtained for the potential range of 0 to 2.0 V vs. Li
/Li+. This first discharge capacity of amorphous 50SiO . 50SnO powders was
much larger than that of amorphous materials in the system SnO-B2O3-P2O5 ob
tained by mechanical milling reported previously. In addition, irreversible
capacity of the former was smaller than that of the latter. The amorphous
50SiO . 50SnO powders synthesized by mechanical milling treatments are one
of the promising candidates as anode materials for lithium-ion secondary ba
tteries. (C) 2001 The Electrochemical Society.