https://scholars.lib.ntu.edu.tw/handle/123456789/637562
標題: | Novel synthesis of nickel-based bimetallic compounds using ammonium tetrafluoroborate and ammonium bifluoride as structure directing agents for energy storage application | 作者: | Kuo, Tsung Rong Yu, You Zher Lee, Pin Yan Wu, Chung Hsien Chen, Hung Ming Husain, Sadang Kongvarhodom, Chutima KUO-CHUAN HO Lin, Lu Yin |
關鍵字: | Energy storage device | Multiple redox states | Nickel-based bimetallic compounds | Structure directing agent | 公開日期: | 1-一月-2024 | 卷: | 75 | 來源出版物: | Journal of Energy Storage | 摘要: | Nickel-based compounds are widely applied as the active material for energy storage devices, owing to high theoretical capacity and easy-fabricated process. Bimetallic compounds having multiple redox states can provide abundant redox reactions for charge storage. Structure directing agent (SDA) can promote the preferable growth of active materials and to enhance energy storage abilities. In this work, NH4BF4 and NH4HF2 are firstly used as SDA to synthesize nickel-based compounds along with 2-methylmidozole in the one-step solution process for energy storage applications. The bimetallic compounds are synthesized by incorporating Al, Mn, Co, Cu and Zn salts in the precursor solution including the Ni salt. The system with Al, Cu or Zn possesses single metal compound and barely nickel compound. Mn and Co-incorporated systems present clear bimetallic components with nickel hydroxide. The highest specific capacitance (CF) of 1336.3 F/g (297.0 mAh/g) are achieved at 20 mV/s for the NiCo-based electrode, owing to the bimetallic feature and favorable two-dimensional sheet-like structures. An energy storage device is assembled using the NiCo-based compound and reduced graphene oxide electrodes. The maximum energy density of 10.5 Wh/kg at 0.3 kW/kg, and the CF retention of 78.5% and Coulombic efficiency of 85.2% are achieved after 10,000 times charge/discharge cycles. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/637562 | ISSN: | 2352152X | DOI: | 10.1016/j.est.2023.109602 |
顯示於: | 化學工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。