超级电容器
材料科学
纳米片
电解质
电极
电容
电化学
功率密度
金属有机骨架
化学工程
纳米技术
化学
工程类
功率(物理)
量子力学
物理
物理化学
吸附
有机化学
作者
Yanzhong Wang,Yuexin Liu,Huiqi Wang,Wei Liu,Ying Li,Jinfang Zhang,Hua Hou,Jinlong Yang
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2019-02-19
卷期号:2 (3): 2063-2071
被引量:368
标识
DOI:10.1021/acsaem.8b02128
摘要
Metal–organic frameworks (MOFs) have attracted intensive attention for high-performance supercapacitors owing to their large specific surface area and tunable pore structure. Herein, ultrathin NiCo-MOF nanosheets are fabricated by a facile ultrasonication at room temperature and employed as a supercapacitor electrode material. The unique nanosheet-like structure of NiCo-MOF provides more electroactive sites and a shorter pathway for electron transfer and electrolyte diffusion, resulting in excellent electrochemical performance with a high specific capacitance of 1202.1 F g–1 at 1 A g–1. In addition, an asymmetric supercapacitor of NiCo-MOF//activated carbon was assembled in 2 M KOH electrolyte. It delivers an energy density of 49.4 W h kg–1 at a power density of 562.5 W h kg–1 in a voltage window of 1.5 V. The results demonstrate a new method to fabricate ultrathin MOF nanosheets for high-performance supercapacitor electrode materials.
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