材料科学
超级电容器
碳纳米管
电解质
电容
多孔性
电导率
纳米管
电容感应
化学工程
复合材料
电化学
复合数
纳米技术
电极
化学
电气工程
工程类
物理化学
作者
Shaozu Sun,Yangyang Wang,Lianxi Chen,Mei Chu,Yulin Dong,Dan Liŭ,Peng Liu,Qu Deyu,Junxin Duan,Li Xi
标识
DOI:10.1016/j.colsurfa.2022.128802
摘要
Metal-organic frameworks (MOFs) with high porosity and multivalent metal ion is a kind of prospective material for supercapacitor. However, the poor conductivity and stability degrade the capacitive performance of MOFs. Herein, a corrugated-layered-structure MOF(Ni)/carbon nanotube composite (MOF(Ni)/CNT) was prepared by solvothermal method. The corrugated-layered-structure of MOF(Ni) offers a sufficient electrolyte storage space and a fast ion diffusion channel, and 1D nanotube structure of CNT offers a good electrical conductivity and stability, which makes MOF(Ni)/CNT have an excellent capacitive performance. Compare to MOF(Ni), MOF(Ni)/CNT(w%) have a better electrochemical performance. Especially, MOF(Ni)/CNT(10%) not only has the highest specific capacitance, but also possesses an outstanding rate capacity (88.6% retention at 10 A g−1). Moreover, the asymmetric supercapacitor MOF(Ni)/CNT(10%)//AC can reach 97 F g−1 at 0.5 A g−1 and has 83.2% retention after 5000 cycles. It's also shows a high energy density of 32.6 Wh kg−1 at a power density of 476.5 W kg−1. This work illustrates that layered MOFs are prospective materials for supercapacitor and provides a facile and effective way to boost the capacitive performance.
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