CeO2 quantum dots doped Ni-Co hydroxide nanosheets for ultrahigh energy density asymmetric supercapacitors

• 作者: Changyun Chen Huan Pang Huiyu Duan Jing Zhuang Rongmei Zhu Suli Liu Tong Wang Xinyi Wu Ziyun Su
• 来源期刊: 中国化学快报（英文版）
• 年，卷（期）: 2020,（9）
• 所属期刊栏目: Communications
• 页码范围: 2330-2332
• 页数: 3页
• 语种: 英文

摘要

By integrating the merits of lanthanide elements and quantum dots, we firstly design CeO2 quantum dots doped Ni-Co hydroxide nanosheet via a controllable synthetic strategy, which exhibits a large specific capacitance (1370.7 F/g at 1.0 A/g) and a good cyclic stability (90.6％ retention after 4000 cycles). Moreover, we assemble an aqueous asymmetric supercapacitor with the obtained material, which has an extremely high energy density (108.9 Wh/kg at 378 W/kg) and outstanding cycle stability (retaining 88.1％capacitance at 2.0 A/g after 4000 cycles).