Urchin-like FeOOH hollow microspheres decorated with MnO2 for enhanced supercapacitor performance
Urchin-like FeOOH hollow microspheres decorated with MnO2 for enhanced supercapacitor performance
复制标题
MnO2 修饰的海胆状 FeOOH 空心微球可增强超级电容器性能
DOI：
10.1007/s40843-017-9122-4
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发表时间：
2018-01-01
影响因子：
8.1
通讯作者：
An, Changhua
中科院分区：
文献类型：
--
作者：
Du, Kun;Wei, Guijuan;An, Changhua
Ultrathin MnO2 decorated hierarchical urchin-like FeOOH hollow micro-nanospheres have been designed and synthesized through a facile hydrothermal route. The microspheres are made of FeOOH nanofibers with a diameter of 10 nm. Due to the synergetic effect between the unique FeOOH hollow micro/nanostructures and ultrathin MnO2 layer, the as-fabricated FeOOH@MnO2 hybrid electrode exhibits a high specific capacitance of 1192 F g−1 at a current density of 1 A g−1. It also reveals high rate capabilities and superior stability. Moreover, the asymmetric supercapacitor (ASC) assembled from the FeOOH@MnO2 and the active carbon (AC) delivers a high energy density of 40.2 W h kg−1 at a power density of 0.78 kW kg−1, and the energy density could remain 10.4 W h kg−1 under a condition of high power density of 11.7 kW kg−1.摘要本文通过简便的水热技术合成了超薄MnO2修饰的海胆状FeOOH空心微纳米球. 该微米球由直径10 nm的纳米纤维组成. 由于FeOOH独特的微纳米结构和MnO2的协同效应, 所制备的FeOOH@MnO2电极在电流密度1 A g−1下表现出1192 F g−1的比电容, 同时显示出较高的倍率性能和优异的稳定性. 而且由FeOOH@MnO2电极和活性炭组装的非对称电容器在0.78 kW kg−1的功率密度下具有40.2 W h kg−1的能量密度; 在较高的11.7 kW kg−1功率密度下, 功率密度仍能保持在10.4 W h kg−1.