Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 539, Issue -, Pages 545-552Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.12.095
Keywords
NiCo-layered double-hydroxide; Nanosheets; Metal-organic frameworks; Carbon nanotubes; Hybrid supercapacitor
Categories
Funding
- National Natural Science Foundation of China [51602131, 21477050]
- Natural Science Foundation of Jiangsu Province [BK20160526]
- China Postdoctoral Science Special Foundation [2018T110449]
- Henry Fok Education Foundation [141068]
- Innovation/Entrepreneurship Program of Jiangsu Province [Surencaiban [2016] 32]
- Youth Backbone Teacher Training Engineering of Young Talent Cultivation Program
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Exploring porous nano-structured materials has great significance for energy storage equipment. The metal-organic frameworks (MOFs) can be used as the outstanding sacrificial templates for electrode material of high performance supercapacitors due to their superior features that high specific surface area and tunable pore size distribution. However, the poor conductivity of MOFs is one of the biggest barriers to achieve high rate capacity and stable cycling performance. Herein, MOFs derived NiCo-layered double-hydroxide (NiCo-LDH) and nitrogen-doped carbon nanosheets (NC) on the flexible carbon nanotubes (CNTs) film are rationally designed, both of which as the binder-free electrodes can greatly improve the specific surface area and reaction sites. An asymmetric supercapacitor based on porous NiCo-LDH nanosheets on CNTs (CNT@NiCo-LDH) as the positive electrode and the NC nanosheets on carbon nanotubes film (CNT@NC) as the negative electrode exhibits the maximum energy density of 37.4 W h/kg at the power density of 750 W/kg, as well as a long-term cycling stability (94.5% capacity retention after 5000 cycles). Rationally design such combination is a meaningful process for energy storage equipment with excellent electrochemical performance. (C) 2018 Published by Elsevier Inc.
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