超级电容器
材料科学
电容
碳纳米管
电极
复合数
电化学
纳米技术
多孔性
电导率
电流密度
导电体
碳纤维
金属有机骨架
化学工程
复合材料
化学
物理
有机化学
物理化学
量子力学
吸附
工程类
作者
Shichen Lu,Feng Xie,Hanyu Liu,Yanhong Liu,Zhe Zhang,Wei Shang,Jiqiong Jiang,Yuqing Wen
标识
DOI:10.1016/j.electacta.2023.143063
摘要
Metal organic frameworks (MOFs) as electrode materials for supercapacitors have attracted extensive attention due to their porous structure. However, the poor conductivity of MOFs limits the charge transfer. In this work, Mn-MOF/carbon nanotube (CNT) composites were grown directly on carbon cloth (CC) in one step by the traditional hydrothermal synthesis of MOFs to improve the electrical conductivity of Mn-MOFs. The structural and performance tests show that CNTs, as a conductive backbone, can connect Mn-MOFs to each other, which can obviously solve the problem of poor conductivity of MOF materials. The Mn-MOFs/CNTs/CC electrodes show a larger specific capacitance and excellent cycling stability by electrochemical tests. Compared to the original Mn-MOF electrode, the surface capacitance obtained increases from 188.8 mF·cm−2 to 385.8 mF·cm−2 at a current density of 0.8 mA·cm−2 and maintains a high capacitance retention of 118% after 5000 charge/discharge cycles at a current density of 5 mA·cm−2. This work confirms that the in- situ synthesis of MOFs and CNTs has promising applications in fabric-based flexible supercapacitors.
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