Unveiling the Effect of Surface and Bulk Structure on Electrochemical Properties of Disproportionated SiOx Anodes

As a promising lithium-ion battery anode materials, silicon suboxides (SiOx) exhibit elusive microstructure with atomic-scale disproportionation which reveals a strong relation to performance. Generally, the structure of SiOx could be tuned via high-temperature treatment. In this work, disproportionated SiOx are prepared to systematically discuss the internal relationship among microstructure, physicochemical properties and electrochemical performance. After annealing, amorphous SiO2 and nanocrystalline Si appear, and the SiO2 accumulating on the surface results in large resistance and low Li-ion diffusivity, which leads to large overpotential and poor performance. If mechanical milling is employed followed by annealing, the SiO2 layer can be crushed, SiOx and Si with electrochemical activity are uncovered. Further research on the SiOx with diverse degrees of disproportionation indicates that proper amount of Si and SiO2 determines the optimal electrochemical performance. This result gives an in-depth understanding and probable guidance to the modification investigation of SiOx anode for Li-ion batteries

Graphene Nanoscrolls with Confined Silicon Nanoparticles as a Durable Anode for Lithium-Ion Batteries

Graphene Nanoscrolls with Confined Silicon Nanoparticles as a Durable Anode for Lithium-Ion Batterie

Reactivating Li2O with Nano-Sn to Achieve Ultrahigh Initial Coulombic Efficiency SiO Anodes for Li-Ion Batteries

Reactivating Li2O with Nano-Sn to Achieve Ultrahigh Initial Coulombic Efficiency SiO Anodes for Li-Ion Batterie

An overview of Monascus fermentation processes for monacolin K production

In Asia, Monascus has been used in food fermentation for nearly a thousand years. It has attracted increasing attention in recent years due to its ability to produce a variety of important active substances such as monacolin K (MK) and pigments. MK is an effective drug widely used for lowering human blood cholesterol that functions by inhibiting the rate-limiting enzyme in cholesterol biosynthesis. Monascus strains, fermentation methods and fermentation conditions have significant effects on MK yield, and much research has been undertaken to obtain higher MK yields. In this paper, the research progress of Monascus strain breeding for high MK yield, medium optimization for MK production during Monascus fermentation, and optimization of fermentation process conditions are fully reviewed. This provides reference for future research on Monascus fermentation and industrial production for high-yield MK production