High-performance energy-storage devices based on WO3 nanowire arrays/carbon cloth integrated electrodes

Abstract

Ordered WO 3 nanowire arrays on carbon cloth (WNCC) conductive substrates are successfully prepared by a facile hydrothermal method. The as-prepared samples were characterized by XRD, SEM and TEM and directly functionalized as supercapacitor (SC) and lithium-ion battery (LIB) electrodes without using any ancillary materials such as carbon black or binder. The unique structural features endow them with excellent electrochemical performance. The SCs demonstrate high specific capacitance of 521 F g À1 at 1 A g À1 and 5.21 F cm À2 at 10 A cm À2 and excellent cyclic performance with nearly 100% capacity retention after 2000 cycles at a current density of 3 A g À1 . All-solid-state SCs based on the integrated electrodes are also presented, exhibiting high flexibility without obvious performance declination at different bending states. A high capacity of 662 mA h g À1 after 140 cycles at a 0.28 C rate and excellent rate capabilities are also obtained for LIBs due to the unique structures of the integrated electrodes.

Facile synthesis of Cu2O microstructures and their morphology dependent electrochemical supercapacitor properties

“…Furthermore, the 3-dimensional (3D) structure of the Ni foam conductive substrate can provide fast electronic transfer channels and exhibit more active reaction sites with the electrolyte to participate in the fast redox reactions and display stronger adhesion with the current collector to improve the electrochemical performance. 28,54 Interestingly, the microcubes show better specic capacitance and cycling property than the microspheres, even though its surface area is lower and pore size is wider. The electrochemical performance depends mainly on the surface area, pore size, crystallinity, and electrical conductivity.…”

On the Supercapacitive Behaviour of Anodic Porous WO3-Based Negative Electrodes

“…This enhancement results from the additive effect of fast superficial redox reactions and electric double layer formation at the electrode/electrolyte interface. [12,[16][17][18][19][20][21][22][23] show promising pseudocapacitive behaviour as well as reasonable capacity retention in asymmetric systems in the negative potential region.…”

Controlled synthesis of monodisperse WO3·H2O square nanoplates and their gas sensing properties

“…The morphological parameters such as size, shape and facet of tungsten oxide particles are critically important in its applications such as sensing properties [19,20]. Recently, in order to control the morphology and size of tungsten oxides, many efforts have been devoted to the syntheses route [21-23] As a result, a variety of chemical or physical methods have been applied to synthesize special nanostructures and morphologies such as nanowires [24,25], nanorods [26, 27], nanotube [28], nanoplates [29, 30], nanocuboids [31, 32], hexagonal nanodisks [33], nanospheres [34] and hollow spheres [35]. …”