Facile preparation and electrochemical properties of hierarchical chrysanthemum-like WO3·0.33H2O

Abstract

A symmetrical 3D chrysanthemum-like WO 3 $0.33H 2 O hierarchitecture has been prepared via a facile hydrothermal approach. A growth mechanism has been proposed for the hierarchitecture. With preferable electrochemical properties, WO 3 $0.33H 2 O displays potential application in lithium ion batteries.

Hydrothermal preparation and supercapacitive performance of flower-like WO3·H2O/reduced graphene oxide composite

“…Based on the above experimental results and other previous work [13,22,40,41], the formation process of the flower-like WO 3 ·H 2 O/rGO composites can be illustrated by Fig. 5.…”

“…Tungsten trioxide (WO 3 ) and its hydrates (WO 3 ·xH 2 O, x = 0∼2), as one of the important transition metal oxides, are extensively investigated due to the promising properties and a wide spectrum of applications in gas sensors [11,12], photocatalysis [13,14], electrochromic devices [15,16], electronic devices [17], dye-sensitized solar cells [18,19], adsorbent [20] and lithium ion batteries [21,22]. The capacitive behaviors of the nanostructured tungsten oxides have been also investigated as supercapacitor electrodes [23][24][25][26][27][28][29].…”

Tungsten Oxide Nanofibers Self-assembled Mesoscopic Microspheres as High-performance Electrodes for Supercapacitor

“…Very recently, tungsten based materials (WO2, WO3 and WO3xH2O etc.) are investigated as promising electrodes for pseudocapacitors because of high electronic conductivity (10-10 -6 s cm -1 ), high intrinsic density (>7 g cm -3 ) and small radius and right crystalline phase for fast ion insertion and superior electrochemical performances [14][15][16][17]. Gu et al [18] prepared WO3 nanowire arrays directly on the carbon cloth by hydrothermal reaction and achieved a high specific capacitance of 521 F g -1 at the current density of 1 A g -1 ; Yoon et al [19,20] obtained mesoporous WO3-x and investigated their applications in lithium ion batteries (LIBs) and SCs, which demonstrate 200 F g -1 at the current density of 1 mA cm -2 ; Tian et al [21] synthesized W18O49 nanofibers by adding ethanol and electrodeposition polyaniline film and studied its applications in SCs, this copolymer showed 440 F g -1 at the high current density of 2 A g -1 .…”

Ionic liquid-modulated preparation of hexagonal tungsten trioxide mesocrystals for lithium-ion batteries

“…and a promising anode materials for lithium-ion batteries. [25][26][27][28][29][30][31][32][33] It should be pointed that bulk h-WO 3 electrodes often suffer from low capacity and poor cycle performance, even in some case show electrochemically inactive. Considering that mesocrystalline modification of electrode materials has exhibited the significant improvement for high electrochemical performance, [34][35][36][37][38] we try to apply this strategy into h-WO 3 electrodes in the present study.…”