Mechanochemical Synthesis and Anode Properties of SnO‐Based Amorphous Materials
| Autor: | Masahiro Tatsumisago, Hideyuki Morimoto, Tsutomu Minami, Miyuki Nakai |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Battery (electricity)
Materials science Renewable Energy Sustainability and the Environment Analytical chemistry Order (ring theory) chemistry.chemical_element Mineralogy Electrolyte Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Anode Amorphous solid chemistry X-ray crystallography Materials Chemistry Electrochemistry Energy density Carbon |
| Zdroj: | Journal of The Electrochemical Society. 146:3970-3973 |
| ISSN: | 1945-7111 0013-4651 |
| Popis: | 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 ofmore » 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.« less |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|