Facile synthesis of trimetallic compounds based on cobalt and nickel with ammonium fluoride-based complex for energy storage applications
บทความในวารสาร
ผู้เขียน/บรรณาธิการ
กลุ่มสาขาการวิจัยเชิงกลยุทธ์
รายละเอียดสำหรับงานพิมพ์
รายชื่อผู้แต่ง: Cheng T.-M.; Kuo P.-C.; Lai Y.-C.; Lee P.-Y.; Kongvarhodom C.; Saukani M.; Yougbaré S.; Chen H.-M.; Ho K.-C.; Lin L.-Y.
ผู้เผยแพร่: Elsevier
ปีที่เผยแพร่ (ค.ศ.): 2025
วารสาร: Journal of Environmental Chemical Engineering (2213-2929)
Volume number: 13
Issue number: 3
นอก: 2213-2929
eISSN: 2213-3437
ภาษา: English-Great Britain (EN-GB)
บทคัดย่อ
Morphology of metal compounds plays critical roles in energy storage ability. Structure-directing agents (SDAs) are effective in controlling morphology and composition. Ammonium bifluoride (NH4HF2) and ammonium fluoride (NH4F) are intensively applied SDAs in synthesizing metal compounds. Cobalt and nickel-based compounds with large theoretical capacities and high electrochemical activities are effective active materials in energy storage systems. Incorporating a third metal improves electrochemical performance by enhancing redox states. In this work, trimetallic compounds based on cobalt and nickel are synthesized using a simple solution process at room temperature with Al, Mn, Cu, and Zn as active materials. The SDAs of NH4HF2 and NH4F as well as the pH modulator of 2-methylimidazole participated in the synthesis. The highest specific capacitance (CF) of 739.3 F/g corresponding to the specific capacity of 517.6 C/g are achieved for the trimetallic compound based on Co, Ni and Cu (CoNiCu), owing to multiple redox states and large electrical conductivity. A two-electrode device is assembled using the CoNiCu positive electrode and a carbon electrode. A maximum energy density of 22.1 Wh/kg is obtained at 350 W/kg, and excellent long-term operating stability with the CF retention of 90.0% and Coulombic efficiency of 97.2% are achieved after 10,000 cycles. © 2025 Elsevier Ltd.
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