A Feasible Dual Modification Strategy of Internal Anion Redox Chemistry and Surface Engineering on P2 Layer-Structured Cathodes in Sodium-Ion Batteries.

Boosting the anion redox reaction opens up a possibility of further capacity enhancement on transition-metal-ion redox-only layer-structured cathodes for sodium-ion batteries. To mitigate the deteriorating impact on the internal and surface structure of the cathode caused by the inevitable increase in the operation voltage, probing a solution to promote the bulk-phase crystal structure stability and surface chemistry environment to further facilitate the electrochemical performance enhancement is a key issue. A dual modification strategy of establishing an anion redox hybrid activation trigger agent inside the crystal structure in combination with surface oxide coating is successfully developed.

Enantiospecific Analysis of Carboxylic Acids Using Alkaloid Dimers as Chiral Solvating Agents.

alkaloid derivatives as Brønsted base catalysts have attracted considerable attention in the field of asymmetric catalysis. However, their potential application as chiral solvating agents has not been described. In this research, we investigated the use of the alkaloid dimer, namely, (DHQ)PHAL, as a chiral solvating agent for discerning various mandelic acid derivatives through H NMR spectroscopy.

Improving Low-temperature Performance and Stability of Na Ti O Anodes by the Ti-O Spring Effect through Nb-doping.

Na Ti O (NTO) with high safety has been regarded as a promising anode candidate for sodium-ion batteries. In the present study, integrated modification of migration channels broadening, charge density re-distribution, and oxygen vacancies regulation are realized in case of Nb-doping and have obtained significantly enhanced cycling performance with 92 % reversible capacity retained after 3000 cycles at 3000 mA g . Moreover, unexpected low-temperature performance with a high discharge capacity of 143 mAh g at 100 mA g under -15 °C is also achieved in the full cell.

Study of the method of spinal cord neuron culture in Sprague-Dawley rats.

This study aimed to explore the method of culture of spinal cord neurons (SPNs) in vitro and to provide prerequisites for studying the molecular mechanism and pharmacological mechanism of spinal cord injury and repair. The spinal cord tissues of neonatal Sprague-Dawley rats were taken and digested by trypsin, followed by cytarabine (Ara-C) to inhibit the proliferation of heterogeneous cells, differential velocity adhesion, and natural growth in neuron-specific medium. Then, the morphology of SPNs was observed.