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高熵氧化物(High-Entropy Oxides, HEOs)凭借其独特的多元素协同效应和结构稳定性，已成为电化学储能领域的前沿研究方向。本文采用水热和煅烧相结合的方法制备了尖晶石型高熵(Ni0.2Fe0.2Cr0.2Mn0.2Zn0.2)Co_2O4纤维(HEOF)，并对其超级电容器和电催化析氧(OER)性能进行了研究。结果表明，HEOF在1 A/g的电流密度下具有396 F/g的比电容，经过8000次循环后，电容保持率为58.6%。由HEOF高熵粉体和活性炭(AC)组装的非对称超级电容器(HEOF//AC)的能量密度达到了30 Wh/kg，功率密度为713 W/kg，展现出其良好的实际应用潜力。此外，HEOF在1 mol/L的KOH溶液中，展现出良好的OER性能，在10 mA/cm2电流密度下的过电位为284 mV，并具有优异的电化学稳定性。本研究为构建高性能高熵氧化物双功能电极材料提供了一种有效策略，并展示了其在电化学储能与电催化领域的应用潜力。
Abstract：High-entropy oxides(HEOs) have rapidly emerged as a cutting-edge research direction in electrochemical energy storage owing to their unique multi-element synergistic effects and structural stability. In this study, spinel-type high-entropy(Ni0.2Fe0.2Cr0.2Mn0.2Zn0.2)Co_2O4 fibers(HEOF) were prepared via a combined hydrothermal and calcination method, and their supercapacitor and electrocatalytic oxygen evolution reaction(OER) performances were systematically investigated. The results show that HEOF exhibits a specific capacitance of 396 F/g at 1 A/g, with a capacitance retention of 58.6% after 8000 cycles. The asymmetric supercapacitor(HEOF//AC) assembled with HEOF and activated carbon achieves an energy density of 30 Wh/kg at a power density of 713 W/kg, demonstrating good practical application potential. Furthermore, HEOF exhibits excellent OER performance in 1 mol/L KOH solution, with an overpotential of 284 mV at 10 mA/cm2 and outstanding electrochemical stability. This study provides an effective strategy for constructing high-performance bifunctional electrode materials based on high-entropy oxides and demonstrates their promising application potential in electrochemical energy storage and electrocatalysis.
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基本信息:
DOI：10.16521/j.cnki.issn.1001-9642.2026.10.004
中图分类号:TQ342.8;TQ426;TM53
引用信息:
[1]邓潇,曾辉,田阳柳,等.高熵氧化物纤维的制备及其超级电容器和电催化析氧性能[J].中国陶瓷,2026(10):29-39.DOI:10.16521/j.cnki.issn.1001-9642.2026.10.004.
基金信息:
国家自然科学基金(52472064); 陕西省重点研发计划项目(2025CY-YBXM-144)
2026-09-28
2026-09-28
2026-09-28