Non-equilibrium Electrochemical Processing of Nano-structured Energy Conversion & Storage Devices

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  • ナノ構造エネルギー変換貯蔵デバイスの非平衡電気化学プロセシング

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第26回宇宙利用シンポジウム(2010年1月25日-26日, 宇宙航空研究開発機構宇宙科学研究本部相模原キャンパス)

The Twenty-sixth Space Utilization Symposium (January 25-26, 2010: ISAS/JAXA Sagamihara, Japan)

Non-equilibrium electrochemical processing of ZnO nanowire arrays is engaged in Kyoto University. The gravitational level effect has been recognized in the uniformity of PL characteristics of electrodeposited ZnO nanowire arrays. Amorphous Si thin film has been also electrodeposited in ionic liquid(TMHATFSI-0.1MSiCl4) as well as PC organic electrolyte. Based on these achievements, the electrodeposition of Si nanowire is now challenging. Amorphous SiO2 powder refined from diatomaceous earth (DE-SiO2, 5N in purity) are pressed into pellets, and the electrolytic reduction of them is investigated in molten CaCl2 at 1123 K. DE-SiO2 pellets are successfully reduced to Si at 1.00 and 1.20 V vs. Ca(2+)/Ca. Rod-like nanostructure is observed in SEM of reduced Si sample. Furthermore, the reduction rate of DE-SiO2 pellet is higher than that for fumed-SiO2 pellet. DE-SiO2 will be one of the most promising Si sources in the industrial-scale electrolytic reduction in both aspects of the reduction rate and the abundance of the resources.

共催: 日本学術会議

著者人数: 29人

joint hosting: The Science Council of Japan

資料番号: AA0064730029

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