Prussian blue-derived multiple yolk–single shell-structured Se-doped Fe₇S₈@NC@C microcube composites as high-rate anodes for sodium-ion batteries

Abstract

The yolk-shell structured provides sufficient void space; the dual-carbon layer acts as a rigid skeleton. Meanwhile, Se-doping improving the electrical conductivity and enlarging the interlayer distance to enhance Na storage.

Te doped 1T/2H-MoSe2 nanosheets with rich defects as advanced anode materials for high-rate sodium ion half/full batteries

“…The capacitance ratio is about 49.3% when the scan rate is 0.8 mV s −1 , and when the scan rate enhances to 1.0 mV s −1 , the capacitance ratio increases to 51.8%, demonstrating that the entire charge storage capacity of Te-MoSe 2 electrode is attributed to the combined effect of battery and capacitance contributions. 59,60 Fig. 5e shows the Nyquist curves of two electrodes.…”