Ultrathin Mn Doped Ni-MOF Nanosheet Array for Highly Capacitive and Stable Asymmetric Supercapacitor

被引：87

作者：

Zheng, Dengchao ^{[1
]}

Wen, Hao ^{[1
]}

Sun, Xun ^{[1
]}

Guan, Xin ^{[1
]}

Zhang, Jie ^{[1
]}

Tian, Wenli ^{[1
]}

Feng, Hao ^{[1
]}

Wang, Hongjing ^{[2
]}

Yao, Yadong ^{[1
]}

机构：

[1] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Sichuan, Peoples R China

[2] Sichuan Univ, West China Univ Hosp 2, Chengdu 610065, Sichuan, Peoples R China

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2020年 / 26卷 / 71期

关键词：

asymmetric supercapacitors; electrode materials; highly-capacitive and stable; LDH template; ultrathin Ni-MOF nanosheet array; METAL-ORGANIC FRAMEWORKS; TEMPLATE-DIRECTED GROWTH; LAYERED DOUBLE HYDROXIDE; ELECTRODES; OXIDATION; NANOARRAY; EFFICIENT; STORAGE;

D O I：

10.1002/chem.202003220

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this study, we demonstrate that an Mn-doped ultrathin Ni-MOF nanosheet array on nickel foam (Mn-0.1-Ni-MOF/NF) serves as a highly capacitive and stable supercapacitor positive electrode. The Mn-0.1-Ni-MOF/NF shows an areal capacity of 6.48 C cm(-2) (specific capacity C: 1178 C g(-1)) at 2 mA cm(-2) in 6.0 m KOH, outperforming most reported MOF-based materials. More importantly, it possesses excellent cycle stability to maintain 80.6 % capacity after 5000 cycles. An asymmetric supercapacitor device utilizing Mn-0.1-Ni-MOF/NF as the positive electrode and activated carbon as the negative electrode attains a high energy density of 39.6 Wh kg(-1) at 143.8 Wkg(-1) power density with a capacitance retention of 83.6 % after 5000 cycles.

引用

页码：17149 / 17155

页数：7

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