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Swallow‐Nest‐Inspired Strategy towards Ultralight Functional Multiwall‐Carbon‐Nanotube‐Based Aerogels for Supercapacitors
Author(s) -
Jiang Shuai,
Qin Xianzhong,
Chen Rui,
Meng Han,
Du Rong,
Cai Feipeng,
Jiang Bo,
Yang Gai,
Wang Bo,
An Pengfei,
Tan Chunhui
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201801626
Subject(s) - aerogel , supercapacitor , materials science , carbon nanotube , cyclic voltammetry , electrode , capacitance , nanotechnology , nanostructure , electrochemistry , carbon fibers , nanotube , chemical engineering , composite material , chemistry , composite number , engineering
Electrode materials with superior electrochemical properties are at the core of energy‐conversion and storage devices such as supercapacitors. Here, an ultralight functionalized multiwall‐carbon‐nanotube (FMWCNT) based aerogel with swallow nest structure is fabricated by a simple and facile method, and further used as a freestanding electrode for supercapacitors. Besides, soft X‐ray absorption near‐edge structure measurements were performed to probe the valence bonds of the as‐prepared FMWCNT aerogel, revealing the existence of chemical interactions among the atoms. More importantly, a series of experiments including cyclic voltammetry, galvanostatic charge‐discharge cycling, and rate capability tests were performed to evaluate the properties of the as‐prepared FMWCNT aerogel electrodes. Impressively, the specific capacitance of the electrodes was as high as 319 F g −1 in 0.5 M H 2 SO 4 at a constant current density of 10 A g −1 , and no decay was observed after 2000 cycles. These superior properties can be attributed to the unique interconnected nanostructure, large specific surface area, and synergistic effect of the FMWCNT aerogel.