摘要：The yolk-shell structured Ni/Co-based MOFs were first synthesized via one-step hydrothermal method without any template, followed by the pyrolysis treatment to prepare the multilayer core-shells NiCo2O4/NiO structure spheres. The growth mechanism of the Co/Ni-MOF and multilayer core-shells NiCo2O4/NiO microsphere can be explained by the Ostwald ripening and heterogeneous contraction effect, respectively. The obtained multilayer NiCo2O4/NiO microspheres displayed unique three-layer structure with an average diameter of 1–2 μm by TEM. Due to the compositional and structural benefits, the obtained multilayer NiCo2O4/NiO structure spheres exhibited high specific capacitance of 726 F·g⁻¹ at the current density of 1 A·g⁻¹ and a good cycling stability of 91.4% retention over 5000 cycles. In addition, an asymmetric supercapacitor (ASC) based on multilayer NiCo2O4/NiO microspheres and active carbon was fabricated and shown a high energy density of 22.1 Wh·kg⁻¹ at a power density of 4518.6 W·kg⁻¹. These superior electrochemical properties indicated that the multilayer NiCo2O4/NiO microsphere was a promising electroactive candidate for high-performance supercapacitors.
© 2019 Elsevier B.V.

ISSN号：1572-6657

卷、期、页：v 851,

发表日期：2019-01-01

期刊分区（SCI为中科院分区）：无

收录情况：SCIE（科学引文索引网络版）,EI（工程索引）

发表期刊名称：Journal of Electroanalytical Chemistry

通讯作者：Zeng, Dehong,Ma, Chang,Zhang, Wenquan,Kang, Hongtao

第一作者：杨克,辛彦宇,刘汉营,温洋洋,杨英

论文类型：期刊论文

论文概要：杨克,辛彦宇,Zeng, Dehong,Ma, Chang,刘汉营,Zhang, Wenquan,Kang, Hongtao,温洋洋,杨英，Yolk-shell bimetallic metal-organic frameworks derived multilayer core-shells NiCo2O4/NiO structure spheres for high-performance supercapacitor，Journal of Electroanalytical Chemistry，2019，v 851,

论文题目：Yolk-shell bimetallic metal-organic frameworks derived multilayer core-shells NiCo2O4/NiO structure spheres for high-performance supercapacitor