Gui-Hai Chen, Ze-Xi Yang, Shan-Liang Chen, Lan Jiang, Qiao Liu, Lin Wang, Wei-You Yang, Zhi-Sheng Wu, Hui-jun Li, Wei-Jun Li
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引用次数: 0
摘要
过渡金属氧化物（TMOs）由于其较高的理论电容和赝电容特性，在探索先进的超级电容器电极材料方面具有特别的兴趣。本研究报告了激光辅助合成SiC@Fe2O3-x阳极材料的工程氧空位在几秒钟内，提高了电荷传输，氧化还原活性和结构稳定性，从而促进了电化学性能的大幅提高。结果表明，SiC@Fe2O3-x纳米线在5 mA cm−2时的面电容为1082.16，在10,000次循环中保持86.7%的电容。此外，以SiC@Fe2O3-x为负极，Ni(OH)2为正极的组装非对称超级电容器（ASC）在14000次循环后，工作电压为1.5 V，能量密度为197 μWh cm - 2，电容保持率为80.6%，有望应用于下一代储能材料。图形抽象
Rapid oxygen vacancy engineering in SiC@Fe2O3-x nanowires for high-performance supercapacitors
Transition metal oxides (TMOs), thanks to their elevated theoretical capacitance and pseudocapacitive properties, are of particular interest in exploring the advanced supercapacitor electrode materials. The present work reports the rapid laser-assisted synthesis of SiC@Fe2O3-x anode materials with engineered oxygen vacancies in seconds, which improve the charge transport, redox activity, and structural stability, thus facilitating a substantial enhancement in electrochemical performance. As a result, the resultant SiC@Fe2O3-x nanowires exhibit excellent performances with an areal capacitance of 1082.16 at 5 mA cm−2, and retain 86.7% capacitance over 10,000 cycles. Furthermore, the assembled asymmetric supercapacitors (ASC), employing SiC@Fe2O3-x as the negative electrode and Ni(OH)2 as the positive electrode, delivers a 1.5 V operating voltage, an energy density of 197 μWh cm−2, and 80.6% capacitance retention after 14,000 cycles, representing their promise toward the applications in next-generation energy storage materials.
期刊介绍：
Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.
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