High-energy lithium-ion batteries are being increasingly applied in the electric vehicle industry but suffer from rapid capacity fading and a high risk of thermal runaway. The crosstalk phenomenon between the...
A series of soluble polyhedral oligomeric silsesquioxane (POSS) based inorganic−organic hybrid nonlinear optical materials with different architectures, such as dumbbell-type, bead-type and network-type structure, were prepared based on the hydrosilylation addition reaction of multifunctional octahydridosilsesquioxane (T
8
H
) with different azobenzene chromophore monomers. These resultant hybrid composites are soluble in common organic solvents such as tetrahydrofuran, toluene, and chloroform, and exhibit good film-forming ability. Their structures and properties were characterized and evaluated with IR, 1H NMR, 29Si NMR, TGA, DSC, optical limiting measurement and Z-scan technique, respectively. The results show that the structure of these resultant hybrids can be effectively tuned by simply varying the feed ratio and molecular structure of organic chromophore monomers. The incorporation of inorganic POSS into organic azobenzene chromophore has endowed the hybrids with well optical limiting properties and high thermal stability. Simultaneously, the relationship between molecular structure and properties of these hybrids were investigated in detail.
Polypropylene (PP) is the most widely used biomaterial for hernia repair despite its many problems related to over fibrosis. The current study is designed to evaluate and directly compare the biomechanics and antiadhesion properties of the novel, TEMPO(2,2,6,6-tetramethylpyperidine-1oxyl)-mediated modified bacterial cellulose (TBC) mesh and the clinically used PP meshes. Laser perforation generates isotropic, flat and stable structures that prevent deformation under pressure and reduce the risk of potential bacterial colonization. In contrast to the PP mesh, the results of the in vitro study, which involve protein adsorption and cell-material interaction, suggest that TBC preferentially adsorbs bovine serum albumin (BSA) and enhances the expression of type I collagen in fibroblasts. TBC mesh cause less inflammation and is surrounded by newly formed connective tissue composed of type I collagen after implantation in a rabbit model for 1 week, demonstrating that the novel mesh is fully biocompatible and can integrate into surrounding tissues. From this study, TBC mesh may prove to be a viable clinical alternative to existing materials.
Overall Water Splitting
The development of Co‐free cathodes has become a focus in the lithium‐ion battery industry. In article number 2103894, Li Wang, Peng Bai, Hong Xu, Xiangming He and co‐workers offer a detailed and timely insight into the corresponding research progress on Co‐free cathodes of Li‐rich oxides, Ni‐rich layered oxides, and spinel lithium nickel manganese oxide, and demonstrate the associated urgency, challenges, and opportunities in this field, thus assisting the faster industrialization of Co‐free cathodes.
The interaction between the nanofibers of bacterial cellulose and hydroxyapatite has an extensive influence on the microstructure and the macroscopic properties of this type of composite, but the structural anisotropy and the speed of granulation ingrowth are strongly interdependent.
During the last decade, the rapid development of lithium‐ion battery (LIB) energy storage systems has provided significant support for the efficient operation of renewable energy stations. In the coming years, the service life demand of energy storage systems will be further increased to 30 years from the current 20 years on the basis of the equivalent service life of renewable energy stations. However, the life of the present LIB is far from meeting such high demand. Therefore, research on the next‐generation LIB with ultra‐long service life is imminent. Prelithiation technology has been widely studied as an important means to compensate for the initial coulombic efficiency loss and improve the service life of LIBs. This review systematically summarized the different prelithiation methods from anode and cathode electrodes. Moreover, the large‐scale industrialization challenge and the possibility of the existing prelithiation technology are analyzed, based on three key parameters: industry compatibility, prelithiation efficiency, and energy density. Finally, the future trends of improvement in LIB performance by other overlithiated cathode materials are presented, which gives a reference for subsequent research.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.