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Institution

Wuhan University of Technology

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


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Journal ArticleDOI
TL;DR: In this paper, an overview of the causes and consequences of performance degradation after frequent startup-shutdown cycles is presented, including the use of novel catalyst supports and the application of system strategies to prevent performance degradation in PEMFCs.

252 citations

Journal ArticleDOI
TL;DR: Square-shaped single-crystalline SnO(2) nanowires and their sphere-like hierarchical structures were synthesized successfully with a template-free hydrothermal approach and exhibit excellent stability, good sensitivity and selectivity, as well as a quick response and short recovery times under exposure to acetone gas in practical applications.
Abstract: Square-shaped single-crystalline SnO2 nanowires and their sphere-like hierarchical structures were synthesized successfully with a template-free hydrothermal approach. It was found that an intermediate phase—Na2Sn(OH)6—is first produced because it is slow to dissolve in ethanol/water media. The intermediate phase gradually decomposes and converts into SnO2 at temperatures higher than 200 °C. The reaction temperature also affects the microstructure of SnO2 nanomaterials. Uniform square-shaped SnO2 nanowires, which form sphere-like hierarchical structures in 100% structure yield, can be produced at 285 °C on a large scale. The diameter of the nanowires shows a decrease accompanying the increase of the reaction temperature. The temperature effect could be a result of the faster and oriented growth of SnO2 nanowires along their direction at higher temperature. Chemical sensors constructed with square-shaped SnO2 nanowires exhibit excellent stability, good sensitivity and selectivity, as well as a quick response and short recovery times under exposure to acetone gas in practical applications.

252 citations

Journal ArticleDOI
TL;DR: In this paper, a review of the safety properties of SIBs is presented and several effective materials design concepts are also discussed, which can be used to improve the battery safety.
Abstract: DOI: 10.1002/aenm.202000974 and the relatively high cell cost raises concerns on the sustainable development of LIBs, especially in the large-scale energy storage area, which put specific requirements on the price cost, safety, and durability of the battery.[1] In addition to the concern over potential shortage of lithium, the incidents associated with fires and explosions of state-of-the-art LIBs are stimulating advanced strategies and new safe alternatives in recent years. Sodium-ion batteries (SIBs), with identical internal components and working principles with LIBs, have been proposed as one of the most promising nextgeneration energy storage technology because of the evident advantages of lowcost and worldwide abundance of charge carriers.[2] Besides, the cost of SIBs could be further reduced by use of Co/Ni-free cathode materials[3] and aluminum current collector on the anode side since sodium does not alloy with aluminum.[4] In addition to the economic benefits, the configuration of SIBs offers a potentially safe way for batteries storage and transportation. Since Al current collector does not dissolve into electrolyte at a voltage of 0 V, shipping and storing SIBs which contain no energy (a fully discharged state) is potentially feasible.[5] Moreover, Dahn’s group investigated the thermal stability of positive materials for SIBs and found that the desodiated Na0.5CrO2 cathode was less reactive than Li0FePO4 in nonaqueous electrolyte at elevated temperatures.[6] Robinson et al. found that the self-heating rate in a Na-ion pouch cell is significantly slower than that in a commercial LiCoO2 (LCO) pouch cell and the thermal runaway process is less exothermic for Na-ion cells, indicating that SIBs could be a potentially safer option compared with LIBs.[7] However, the larger and heavier Na ions have poor kinetic characteristic in the host structure during insertion reaction process, so it may lead to rapid degradation of the host materials with exothermic reaction.[8–10] In addition, the higher solubility of solid electrolyte interphase (SEI) of SIBs resulting from lower Lewis acidity of sodium complex, indicates that the incomplete coverage of electrode may further lead to undesired side reactions, accelerating heat generation. The cathode materials reported so far, roughly including oxides, polyanions, organics, Prussian blue and its analogues, which have poor electronic/ionic conductivity, will bring issues to thermal diffusion as well.[11] So far, nonaqueous liquid electrolyte is still the primary option for SIBs because of wide electrochemical stable window, high ionic conductivity, and rapid mass transfer at the electrolyteelectrode interface, yet giving rise to safety hazards.[12] Recent Sodium-ion batteries, with their evident superiority in resource abundance and cost, are emerging as promising next-generation energy storage systems for large-scale applications, such as smart grids and low-speed electric vehicles. Accidents related to fires and explosions for batteries are a reminder that safety is prerequisite for energy storage systems, especially when aiming for grid-scale use. In a typical electrochemical secondary battery, the electrical power is stored and released via processes that generate thermal energy, leading to temperature increments in the battery system, which is the main cause for battery thermal abuse. The investigation of the energy generated during the chemical/electrochemical reactions is of paramount importance for battery safety, unfortunately, it has not received the attention it deserves. In this review, the fundamentals of the heat generation, accumulation, and transportation in a battery system are summarized and recent key research on materials design to improve sodium-ion battery safety is highlighted. Several effective materials design concepts are also discussed. This review is designed to arouse the attention of researcher and scholars and inspire further improvements in battery safety.

252 citations

Journal ArticleDOI
TL;DR: In this paper, a novel synergistic TiO2-MoO3 (TO-MO) core-shell nanowire array anode has been fabricated via a facile hydrothermal method followed by a subsequent controllable electrodeposition process.
Abstract: A novel synergistic TiO2-MoO3 (TO-MO) core–shell nanowire array anode has been fabricated via a facile hydrothermal method followed by a subsequent controllable electrodeposition process. The nano-MoO3 shell provides large specific capacity as well as good electrical conductivity for fast charge transfer, while the highly electrochemically stable TiO2 nanowire core (negligible volume change during Li insertion/desertion) remedies the cycling instability of MoO3 shell and its array further provides a 3D scaffold for large amount electrodeposition of MoO3. In combination of the unique electrochemical attributes of nanostructure arrays, the optimized TO-MO hybrid anode (mass ratio: ca. 1:1) simultaneously exhibits high gravimetric capacity (ca. 670 mAh g−1; approaching the hybrid's theoretical value), excellent cyclability (>200 cycles) and good rate capability (up to 2000 mA g−1). The areal capacity is also as high as 3.986 mAh cm−2, comparable to that of typical commercial LIBs. Furthermore, the hybrid anode was assembled for the first time with commercial LiCoO2 cathode into a Li ion full cell, which shows outstanding performance with maximum power density of 1086 W kgtotal −1 (based on the total mass of the TO-MO and LiCoO2) and excellent energy density (285 Wh kgtotal −1) that is higher than many previously reported metal oxide anode-based Li full cells.

251 citations

Journal ArticleDOI
TL;DR: The opinion that using BOF slag in asphalt concrete is feasible is validated, and treated and tested steel slag should be used in a more extensive range, especially in asphalt mixture paving projects in such an abundant steelSlag resource region.

251 citations


Authors

Showing all 40691 results

NameH-indexPapersCitations
Jiaguo Yu178730113300
Charles M. Lieber165521132811
Dongyuan Zhao160872106451
Yu Huang136149289209
Han Zhang13097058863
Chao Zhang127311984711
Bo Wang119290584863
Jianjun Liu112104071032
Hong Wang110163351811
Jimmy C. Yu10835036736
Søren Nielsen10580645995
Liqiang Mai10461639558
Bei Cheng10426033672
Feng Li10499560692
Qi Li102156346762
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2023140
2022599
20213,894
20203,665
20193,551
20183,076