Abstract Combination of CeO2 chunks and carbon nanotubes (CNTs) as supercapacitor electrode material is fabricated. Superior electrochemical performance including high specific capacitance and long term cycling stability is exhibited through electrochemical tests; the CeO2/CNTs electrode achieves specific capacitance reaching 818 F g−1 at scan rate of 1 mV s−1. The hybrid displays excellent capacitance retention of 95.3% after 2000 cycles. The electrochemical property is attributed to the redox properties, good electrical conductivity and synergistic effect of two materials. With the Schottky barrier at CeO2/CNTs interface, electrons can be accumulated at the Fermi level. More electrons can be released in the process of discharge. It is demonstrated that this kind of nanocomposites could be a promising candidate as electrode material for supercapacitor applications.

中文翻译：

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高性能CeO 2 /CNTs杂化材料作为超级电容器的电极材料

摘要 制备了作为超级电容器电极材料的 CeO2 块和碳纳米管 (CNT) 的组合。通过电化学测试展现出优异的电化学性能，包括高比电容和长期循环稳定性；CeO2/CNTs 电极在 1 mV s-1 的扫描速率下实现了达到 818 F g-1 的比电容。该混合体在 2000 次循环后显示出 95.3% 的出色电容保持率。电化学性能归因于两种材料的氧化还原性能、良好的导电性和协同作用。通过 CeO2/CNTs 界面的肖特基势垒，电子可以在费米能级上积累。在放电过程中可以释放出更多的电子。