MoC nanoclusters anchored Ni@N‐doped carbon nanotubes coated on carbon fiber as three‐dimensional and multifunctional electrodes for flexible supercapacitor and self‐heating device

Abstract

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/cm2 at the power density of 2.4 mW/cm2) 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.

New Approach Synthesis of S, N Co‐Doped Graphenes for High‐Performance Supercapacitors

“…The Ragone plot was formed by comparing with the literature (Figure 13). [97–100] When the obtained areal capacitances were compared with the literature, enhanced capacitive behaviours were observed in 5S01N‐GE40 (Table 3). …”

“…The Ragone plot was formed by comparing with the literature (Figure 13). [97][98][99][100] When the obtained areal capacitances were compared with the literature, enhanced capacitive behaviours were observed in 5S01N-GE40 (Table 3).…”

Dynamic stretching–electroplating metal‐coated textile for a flexible and stretchable zinc–air battery

“…Portable and wearable electronics (including health monitors, smart cloth, artificial skin, and so on) have emerged and revolutionized traditional electronic devices. [1][2][3] Due to their applications in the human body, efficient and safe technologies for flexible and stretchable energy storage devices have been proposed to obtain enough power and shape versatility. [4][5][6][7][8][9][10][11] Zinc-air batteries (ZABs), with high theoretical energy density and safety, have recently received considerable attention.…”

Ni-Directed biphase N-doped Mo2C as an efficient hydrogen evolution catalyst in both acidic and alkaline conditions

“…5 In recent years, transition metal carbides and nitrides have attracted worldwide attention because of their unique electronic structure, excellent electrical conductivity, and high hydrogen evolution reaction (HER) activity. [6][7][8][9][10][11] In particular, compared to other transition metal-based electrocatalysts, [12][13][14] a Pt-like d-band structure of hexagonal β-Mo 2 C that is hybri-dized from the d-orbital of Mo and the s-and p-orbitals of C was theoretically predicted in 2005. 15 However, due to the high-temperature carbonization process, the low specific surface area of calcined Mo 2 C leads to a limited surface catalytically active site.…”