Open AccessMoC nanoclusters anchored Ni@N‐doped carbon nanotubes coated on carbon fiber as three‐dimensional and multifunctional electrodes for flexible supercapacitor and self‐heating device
Author(s) -
Liu Fan,
He Jietong,
Liu Xiaoyu,
Chen Yuke,
Liu Zhen,
Chen Duo,
Liu Hong,
Zhou Weijia
Publication year - 2021
Publication title -
carbon energy
Language(s) - English
Resource type - Journals
ISSN - 2637-9368
DOI - 10.1002/cey2.72
Subject(s) - materials science , supercapacitor , electrode , carbon nanotube , nanoclusters , nanotechnology , power density , energy storage , carbon fibers , optoelectronics , composite material , electrochemistry , composite number , power (physics) , chemistry , physics , quantum mechanics
With the rapid development of different kinds of wearable electronic devices, flexible and high‐capacity power sources have attracted increasing attention. In this study, a facile strategy to fabricate Ni nanoparticles embedded in N‐doped carbon nanotubes (CNTs) (Ni@NCNTs) homogeneously coated on the surface of carbon fiber with a multistructural component of molybdenum carbide (MoC/Ni@NCNTs/CC) was synthesized. There are two forms of MoC in MoC/Ni@NCNTs/CC, including the MoC nanoclusters in a size of 2 to 4 nm anchored on Ni@N‐doped CNTs and the MoC nanoparticles as an interface between MoC/Ni@NCNTs and carbon cloth (CC). Multifunctional MoC/Ni@NCNTs/CC served as both positive and negative electrode and a heater in flexible supercapacitors and in wearable devices, which exhibited excellent electrochemical and heating performance. Besides, an all‐solid‐state supercapacitor consists of two pieces of MoC/Ni@NCNTs/CC that exhibited extraordinary energy storage performance with high‐energy density (78.7 µWh/cm 2 at the power density of 2.4 mW/cm 2 ) and excellent cycling stability (≈91% capacity retention after 8000 cycles). Furthermore, all‐solid‐state flexible supercapacitors were incorporated with an MoC/Ni@NCNTs/CC electrode into self‐heating flexible devices for keeping the human body warm. Thus, MoC/Ni@NCNTs/CC is a promising electrode material for flexible and wearable storage systems and heating electronic application.