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

作　　者：Huiyu Duan Tong Wang Xinyi Wu Ziyun Su Jing Zhuang Suli Liu Rongmei Zhu Changyun Chen Huan Pang 

机构地区：[1]Key Laboratory of Advanced Functional Materials of Nanjing,School of Environmental Science,Nanjing Xiaozhuang University,Nanjing 211171,China [2]School of Chemistry and Chemical Engineering,Institute for Innovative Materials and Energy,Yangzhou University,Yangzhou 225009,China

出　　处：《Chinese Chemical Letters》2020年第9期2330-2332,共3页中国化学快报（英文版）

基　　金：financial supports of Natural Science Program of Nanjing Xiaozhuang University(No.2018NXY22);333 High-level Talents Cultivation Project of Jiangsu Province in 2018(No.BRA2018101)。

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(retaining88.1% capacitance at 2.0 A/g after 4000 cycles).

关 键 词：Asymmetric supercapacitor Electrochemical energy storage Quantum dots Transition metal hydroxides Rare earth 

分 类 号：TM53[电气工程—电器] TB383.1[一般工业技术—材料科学与工程]