Mechanochemical synthesis and anode properties of SnO-based amorphous materials

Journal Article · Mon Nov 01 04:00:00 EST 1999 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1392578· OSTI ID:20003927

Morimoto, H; Nakai, M; Tatsumisago, M; Minami, T

Many investigations of anode materials for lithium-ion secondary batteries have been carried out in order to obtain batteries of higher capacity and energy density. Recently, SnO-based glasses, which were prepared by the usual melt quenching technique, have been proposed as a new anode for lithium-ion secondary batteries by Idota et al. It has been reported that the capacity per unit weight was higher than 600 mAh g{sup {minus}1} and the capacity per unit volume was higher than 2,200 mAh cm{sup {minus}3}, values which are almost double those for carbon materials used as anodes of commercial lithium-ion batteries at present. Thus SnO-based glasses have attracted much interest as high-capacity anode materials for lithium-ion secondary batteries. Amorphous materials in the system SnO-B{sub 2}O{sub 3}-P{sub 2}O{sub 5}, with or without the addition of Li{sub 2}O, were synthesized by mechanical milling treatment of starting oxides in a dry N{sub 2} atmosphere at room temperature. These materials, obtained as fine powders, worked as an anode for a lithium-ion secondary battery using a conventional liquid electrolyte. The first discharge capacities of the anode of SnO-B{sub 2}O{sub 3}-P{sub 2}O{sub 5} materials obtained by mechanical milling were more than 500 mAh g{sup {minus}1} at a constant current of 1.5 mA cm{sup {minus}2}. The capacity for Li{sub 2}O added materials was comparable or slightly larger than that for the materials without the addition of Li{sub 2}O. Charge-discharge curves obtained using these materials were similar to those for the glassy powders in the system SnO-B{sub 2}O{sub 3}-P{sub 2}O{sub 5} prepared by a melt quenching procedure. SnO-based amorphous materials obtained by mechanochemical systems are promising candidates as high-capacity anode materials for lithium-ion secondary batteries.

• Research Organization: Osaka Prefecture Univ., Sakai (JP)
• OSTI ID: 20003927
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 11 Vol. 146; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
ANODES
CHEMICAL PROPERTIES
GLASS
GRINDING
POWDERS
SYNTHESIS
TIN OXIDES