Development of highly Na storage material with highly amorphous structure by soft chemical synthesis

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K18252
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Structural/Functional materials
• Research Institution: Tohoku University
• Principal Investigator: Kajita Tetsuya 東北大学, 学際科学フロンティア研究所, 助教 (50729233)
• Co-Investigator(Renkei-kenkyūsha): ITOH Takashi 東北大学, 学際科学フロンティア研究所, 准教授 (40302187)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 二次電池 / 負極 / アモルファス / ナトリウム

Outline of Final Research Achievements

The aim of this research project is to create a highly amorphized material using soft chemistry method and develop new electrode material group for Na-ion battery. We synthesized highly amorphous Si and Ge oxide powders by soft chemistry method. However, only the amorphous Ge oxide powder showed the electrochemical performance for the Na-ion battery. In the soft chemical synthesis, fine particles of several microns was observed by using 2-propanol, a secondary alcohol, as the alcohol species for oxidizing Zintle phase NaM. Using an ether solvent for the Na-ion battery electrolyte solution, the electrochemical performances of the amorphous Ge oxide material were greatly improved.

Free Research Field

二次電池