Wuhan University of Technology

About: Wuhan University of Technology is a education organization based out in Wuhan, China. It is known for research contribution in the topics: Microstructure & Catalysis. The organization has 40384 authors who have published 36724 publications receiving 575695 citations. The organization is also known as: WUT.

Direct Z-scheme TiO2/NiS core-shell hybrid nanofibers with enhanced photocatalytic H2-production activity

Abstract: Photocatalytic water splitting to generate hydrogen (H2) is a sustainable approach for solving the current energy crisis. A novel TiO2/NiS core–shell nanohybrid was fabricated where few-layer NiS n...

Influence of hot pressing sintering temperature and time on microstructure and mechanical properties of TiB2 ceramics

Abstract: In this paper, a titanium diboride ceramic was produced by the hot pressing sintering method. The effects of hot pressing parameters on the TiB 2 ceramic microstructure and mechanical properties were studied. The bending strength and fracture toughness were measured by three point bending testing and single edge notched bending tests (SENB), respectively. The microstructure features of the TiB 2 sintered material were revealed by means of SEM and TEM. The results show that the TiB 2 grain size increases quickly with the increasing temperature and time during hot pressing sintering. The density and the TiB 2 grain size have a great influence on the mechanical properties. The bending strength decreases with increasing TiB 2 grain size, whilst the fracture toughness increases.

Ultrastable and High-Performance Zn/VO2 Battery Based on a Reversible Single-Phase Reaction

Abstract: The aqueous zinc ion batteries (ZIBs) composed of inexpensive zinc anode and nontoxic aqueous electrolyte are attractive candidates for large-scale energy storage applications. However, their development is limited by cathode materials, which often deliver inferior rate capability and restricted cycle life. Herein, the VO2 nanorods show significant electrochemical performance when used as an intercalation cathode for aqueous ZIBs. Specifically, the VO2 nanorods display high initial capacity of 325.6 mAh g–1 at 0.05 A g–1, good rate capability, and excellent cycling stability of 5000 cycles at 3.0 A g–1. Furthermore, the VO2 unit cell expands in a, b, and c directions sequentially during the discharge process and contracts back reversibly during the charge process, and the zinc storage mechanism is revealed to be a highly reversible single-phase reaction by operando techniques and corresponding qualitative analyses. Our work not only opens a new door to the practical application of VO2 in ZIB systems but a...

In-Plane Assembled Orthorhombic Nb2O5 Nanorod Films with High-Rate Li+ Intercalation for High-Performance Flexible Li-Ion Capacitors

Abstract: Organic hybrid supercapacitors that consist of a battery electrode and a capacitive electrode show greatly improved energy density, but their power density is generally limited by the poor rate capability of battery-type electrodes. In addition, flexible organic hybrid supercapacitors are rarely reported. To address the above issues, herein an in-plane assembled orthorhombic Nb2O5 nanorod film anode with high-rate Li+ intercalation to develop a flexible Li-ion hybrid capacitor (LIC) is reported. The binder-/additive-free film exhibits excellent rate capability (≈73% capacity retention with the rate increased from 0.5 to 20 C) and good cycling stability (>2500 times). Kinetic analyses reveal that the high rate performance is mainly attributed to the excellent in-plane assembly of interconnected single-crystalline Nb2O5 nanorods on the current collector, ensuring fast electron transport, facile Li-ion migration in the porous film, and greatly reduced ion-diffusion length. Using such a Nb2O5 film as anode and commercial activated carbon as cathode, a flexible LIC is designed. It delivers both high gravimetric and high volumetric energy/power densities (≈95.55 Wh kg−1/5350.9 W kg−1; 6.7 mW h cm−3/374.63 mW cm−3), surpassing previous typical Li-intercalation electrode-based LICs. Furthermore, this LIC device still keeps good electrochemical attributes even under serious bending states (30°–180°).