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Currently, addressing the challenges posed by the low energy density of lithium titanate (LTO), a prevalent anode material in lithium slurry batteries (LSBs), is crucial for ensuring high stability, storage capacity, and cycle stability, thereby facilitating the commercialization of LSBs. In this study, a heterostructure (LTO-TOB) was created by integrating nano-TiO2(B) (bronze phase) onto the surface of commercial LTO. The coated TiO2(B) layer significantly increases the specific surface area and wettability, guaranteeing fantastic stability. The pseudo-capacitance lithium storage ability of TiO2(B) boosts the power of the electrochemical reaction. The extra interface in the crystalline phase and the presence of oxygen vacancies serve not just as lithium storage sites, but also accelerate the Li+ diffusivity and enhance the electron conductivity. Furthermore, the diffusion mechanism of lithium ions within LTO-TOB anolyte was examined by using a designed in situ Raman cell. The engineered LTO-TOB anolyte assembled reactor boasts a substantial specific capacity of 209.12 mA h g−1 at 0.5C, coupled with remarkable cycle steadiness (with a mere 0.095% capacity loss per 100 cycles). The reactor exhibits favorable electrochemical characteristics in both intermittent mode and static long-term cyclic mode, thereby highlighting the significance of surface heterostructure modification as a key approach in advancing the progress of LSBs. [ABSTRACT FROM AUTHOR]

Articular cartilage is an avascular tissue with very limited capacity of self-regeneration. Trauma or injury-related defects, inflammation, or aging in articular cartilage can induce progressive degenerative joint diseases such as osteoarthritis. There are significant clinical demands for the development of effective therapeutic approaches to promote articular cartilage repair or regeneration. The current treatment modalities used for the repair of cartilage lesions mainly include cell-based therapy, small molecules, surgical approaches, and tissue engineering. However, these approaches remain unsatisfactory. With the advent of three-dimensional (3D) bioprinting technology, tissue engineering provides an opportunity to repair articular cartilage defects or degeneration through the construction of organized, living structures composed of biomaterials, chondrogenic cells, and bioactive factors. The bioprinted cartilage-like structures can mimic native articular cartilage, as opposed to traditional approaches, by allowing excellent control of chondrogenic cell distribution and the modulation of biomechanical and biochemical properties with high precision. This review focuses on various hydrogels, including natural and synthetic hydrogels, and their current developments as bioinks in 3D bioprinting for cartilage tissue engineering. In addition, the challenges and prospects of these hydrogels in cartilage tissue engineering applications are also discussed. [ABSTRACT FROM AUTHOR]

Side by side RGB OLEDs‐on‐Silicon backplane holds great promise for high brightness, high resolution and low cost Micro OLED displays. The main challenge of vacuum thermal evaporation (VTE) patterning technique is to get a submricon‐size shadow distance. Herein, we have explored the relation of shadow distance with mask‐substrate gap, as well as the relationship of shadow distance with evaporation angle. The achievements verify the possibility of manufacturing the ultra‐high resolution side by side RGB AMOLEDs with >4000ppi. The study of ultra‐high resolution evaporation patterning need to be expanded for the OLED microdisplays futures. [ABSTRACT FROM AUTHOR]

Based on analysis of technical advantages of gob-side entry retaining by cutting roof to release pressure, combined with geological and mining technical conditions of 19022 working face of Shiquan Coal Mine, the scheme of gob-side entry retaining by cutting roof to release pressure for Shiquan Coal Mine was proposed: high-strength anchor with single hydraulic props were selected for advanced reinforcement support of mining roadway; pre-split blasting was carried out on the roof of roadway from goaf to advanced support section to form fracture top cutting line during pressure relief; reinforcement support in the back of the working face adopted the form of sluice column + single hydraulic props lifting shed + hydraulic lifting shed. The results of mine pressure monitoring show that the average subsidence of roadway roof is 95 mm, and the average displacement of the two gangs is 225 mm, which is in line with the deformation requirements of the roadway section;the average support resistance of the roadway supports is 33 MPa, which meets the requirements of roadway support strength.

Coal spontaneous combustion (CSC) is a serious threat to the safe mining of coal resources, and the selection of suitable gas indicators to predict the CSC state is crucial for the prevention and control of coal mine fires. In this paper, the temperature-programmed experiment of CSC was first carried out to analyze the gas components and compositions in the oxidative pyrolysis process of three coal samples (lignite, long-flame coal, and lean coal) with different coalification degrees. Subsequently, the spontaneous combustion tendency of these three coal samples was evaluated. Finally, through the variation of gas concentration, gas concentration ratio, and fire coefficient with coal temperature, the indicators suitable for predicting the spontaneous combustion of coal were preferred, and a multi-parameter indicator system was established to make a comprehensive judgment on the spontaneous combustion status of coal. The results show that coal rank is negatively correlated with oxygen consumption rate. The higher the coalification degree of coal, the slower the oxidation reaction and the later the characteristic temperature point appears. The lignite selected in this experiment is a type of coal that is more prone to spontaneous combustion than long-flame coal and poor coal, and the CO concentration, C2H6/CH4, and second fire coefficient R2 can be used as the main indicators for predicting CSC, while the other gases, olefin-alkane ratio and fire coefficient can be used as auxiliary indicators. To some extent, the research content can effectively and accurately determine the stage and degree of coal spontaneous combustion, which has a certain guiding role in predicting CSC. [ABSTRACT FROM AUTHOR]