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A one-step synthesis procedure is developed to prepare flexible S0.6 Se0.4 @carbon nanofibers (CNFs) electrode by coheating S0.6 Se0.4 powder with electrospun polyacrylonitrile nanofiber papers at 600 °C. The obtained S0.6 Se0.4 @CNFs film can be used as cathode material for high-performance Li-S batteries and room temperature (RT) Na-S batteries directly.(More)
Red phosphorus (P) has attracted intense attention as promising anode material for high-energy density sodium-ion batteries (NIBs), owing to its high sodium storage theoretical capacity (2595 mAh g-1 ). Nevertheless, natural insulating property and large volume variation of red P during cycling result in extremely low electrochemical activity, leading to(More)
In this paper, we go on to investigate the concave Young function inequalities for N-demimartingales and obtain some maximal type inequalities for these stochastic process. As some specific concave Young functions, some related inequalities for N-demimartingales are presented. Meanwhile, some convex function inequalities for nonnegative N-demimartingales(More)
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