钒
法拉第效率
材料科学
电解质
离子
锌
锂(药物)
阴极
储能
化学工程
无机化学
化学
电极
冶金
功率(物理)
热力学
物理化学
医学
物理
有机化学
工程类
内分泌学
作者
Patrick Dedetemo Kimilita,Yu Yoshimi,Noriyuki Sonoyama
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2024-01-05
被引量:1
标识
DOI:10.1021/acsaem.3c02561
摘要
Zinc-ion batteries have gained considerable attention owing to their cost-effectiveness, high energy density, and environmental friendliness compared with lithium-ion batteries. However, the development of suitable electrolytes and active materials remains a challenge that must be addressed. In this study, for the first time, Keggin bicapped-type polyoxovanadate KxH9(PV14O42) (KPV) was used as the active material for zinc-ion batteries. Owing to the multiple vanadium and oxygen atoms in KPV, the structure can accommodate and provide a fast kinetic reaction to store Zn2+, thus benefiting from a highly reversible capacity of 413.3 mAh g–1 and high energy and power densities of 348.8 Wh kg–1 and 42.15 kW kg–1, respectively, and maintaining a Coulombic efficiency of nearly 97.96% after 2000 cycles. In addition, the fabricated cell was subjected to critical temperature testing ranging from −20 to 40 °C and the results showed a remarkably high reversible capacity of 375.5 mAh g–1 (0.5 A g–1) at 40 °C. This highlights the potential for designing active materials for high-energy storage devices.
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