Architecting Hierarchical WO3 Agglomerates Assembled With Straight and Parallel Aligned Nanoribbons Enabling High Capacity and Robust Stability of Lithium Storage

Abstract

The pursuit of electrochemical energy storage has led to a pressing need on materials with high capacities and energy densities; however, further progress is plagued by the restrictive capacity (372 mAh g−1) of conventional graphite materials. Tungsten trioxide (WO3)-based anodes feature high theoretical capacity (693 mAh g−1), suitable potential, and affordable cost, arousing ever-increasing attention and intense efforts. Nonetheless, developing high-performance WO3 electrodes that accommodate lithium ions remains a daunting challenge on account of sluggish kinetics characteristics and large volume strain. Herein, the well-designed hierarchical WO3 agglomerates assembled with straight and parallel aligned nanoribbons are fabricated and evaluated as an anode of lithium-ion batteries (LIBs), which exhibits an ultra-high capacity and excellent rate capability. At a current density of 1,000 mA g−1, a reversible capacity as high as 522.7 mAh g−1 can be maintained after 800 cycles, corresponding to a high capacity retention of ∼80%, demonstrating an exceptional long-durability cyclic performance. Furthermore, the mechanistic studies on the lithium storage processes of WO3 are probed, providing a foundation for further optimizations and rational designs. These results indicate that the well-designed hierarchical WO3 agglomerates display great potential for applications in the field of high-performance LIBs.

Mechanism of simultaneous photocatalytic degradation of Rhodamine B and Cr(VI) under visible light using WO3 nanotubes

“…The 1D structure was preserved after annealing, but several nanotubes displayed very smooth surfaces and erratic sizes. Single-crystal ultrathin nanotubes of WO 3 are clearly apparent in TEM and HRTEM images, as [17], is recorded as 0.38 nm, which is similar to previously reported values for hierarchical WO 3 agglomerates [16]. The potential growth mechanism for tungsten oxide nanotubes is outlined as follows:…”

“…The XRD patterns of the synthesised WO 3 samples are shown in figure 1(a). For as-prepared WO 3 (namely S1 sample), the XRD pattern exhibits a strong peak at 2θ = 23.1°, corresponding to the (002) plane of the WO 3 hexagonal phase (JCPDS card number 01-085-2459) phase without any unknown impurity peaks [16]. The other peaks of the hexagonal phase, corresponding to the (100), ( 200), (202), and (004) planes, appear more clearly in the pattern of the annealed sample.…”

Ultraviolet-Induced Gas Sensing Performance of Ag/WO3/rGO Nanocomposites for H2S Gas Sensors

“…Accordingly, the peaks at 529.8 and 530.3 eV in the O 1s spectra are attributed to the oxygen atom (W−O) in WO 3 and C−O in rGO, respectively. 37,38 Figure 6d displays the XPS spectra of the C 1s core level. The C 1s spectra including three major peaks with binding energies of 283.7, 284.2, and 285.3 eV are associated with the C�C, C− C, and C�O, respectively.…”

One-step preparation of binder-free WO3 CNFs/GO self-supported electrodes

“…16,17 In previous studies, the binderless WO 3 nanorods prepared by Bekarevich et al had a specific capacity of 310 mA h g À1 for 50 cycles at a current density of 80 mA g À1 , 17 and the carbon cloth supported WO 3 nanowire electrode prepared by Gao et al had a specific capacity of 662 mA h g À1 for 140 cycles at 0.28 C. 18 The WO 3 nanoribbons prepared by Dong et al had a specific capacity of 487.6 mA h g À1 at a current density of 100 mA g À1 . 19 The introduction of carbon materials not only increases the electrical conductivity but also suppresses volume change. 20 Therefore, in this study, the excellent electrical conductivity of carbon materials and the use of carbon materials as a buffer layer are used to solve the above problem.…”

“…In previous studies, the binderless WO 3 nanorods prepared by Bekarevich et al had a specific capacity of 310 mA h g −1 for 50 cycles at a current density of 80 mA g −1 , 17 and the carbon cloth supported WO 3 nanowire electrode prepared by Gao et al had a specific capacity of 662 mA h g −1 for 140 cycles at 0.28 C. 18 The WO 3 nanoribbons prepared by Dong et al had a specific capacity of 487.6 mA h g −1 at a current density of 100 mA g −1 . 19…”