Glyme-based room-temperature aluminum electrodeposition: sophistication by controlling complex structure

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02490
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 26060:Metals production and resources production-related
• Research Institution: Kyoto University
• Principal Investigator: Kitada Atsushi 京都大学, 工学研究科, 助教 (30636254)
• Co-Investigator(Kenkyū-buntansha): 邑瀬 邦明 京都大学, 工学研究科, 教授 (30283633) ; 深見 一弘 京都大学, 工学研究科, 准教授 (60452322)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 室温金属電析

Outline of Final Research Achievements

As originally planned, certain results were obtained in improving the safety of glyme-based room-temperature aluminum electrodeposition, examining alloy electrodeposition, and flat electrodeposition. After finishing the initial plan, we have also studied room-temperature aluminum plating on magnesium alloy, which is a difficult plating material, and have made progress in other metal electrodeposition baths ((1) Metal electrodeposition from concentrated aqueous solutions: realization of hard trivalent chromium (Cr)plating with high crystallinity and lead (Pb)electrodeposition, and (2) Smooth lithium deposition in the glyme system by the cooperative effect of four additives.) Additionally, we elucidated transport properties of new electrolytes ((A) Anomalous proton conduction in protic solvate ionic liquids containing hydronium(H3O+) and ammonium (NH4+) ions. (B) Improvement of transport rate in glyme-based electrolytes with more than equimolar composition of lithium salts.).

Free Research Field

無機材料科学

Academic Significance and Societal Importance of the Research Achievements

金属アルミニウムは通常ホール・エルー法と呼ばれるプロセスで、1000℃の高温で生産されるが、本研究は金属アルミニウム生産プロセスを室温で行おうというものである。またアルミニウムを電析できる電解質は極めて限られており、その理由として錯体構造が重要であることがわかった。グライム類を用いる電析手法を難めっき材に適用しただけでなく、平滑電析の機構についても一定の理解を得ることができた。