Heterogeneous interface containing selenium vacancies space-confined in double carbon to induce superior electronic/ionic transport dynamics for sodium/potassium-ion half/full batteries

Confine, Defect, and Interface Manipulation of Fe3Se4/3D Graphene Targeting Fast and Stable Potassium‐Ion Storage

“…It is noted that such rate capability of DP-Fe 3 Se 4 /3DG overwhelms that of the reported selenide anodes for PIBs (Figure 3f). [34][35][36][37][38][39][40][41] Further, the longterm cycling stability at a high current density of 5 A g −1 is also explored (Figure 3g). As displayed in Figure 3g, the DP-Fe 3 Se 4 /3DG anode achieves a capacity of 157.9 mA h g −1 after 1000 cycles.…”

Dynamic template directed construction of three-dimensional porous bismuth aerogels for high-rate Na-ion storage

“…7,8 However, the sluggish diffusion kinetics and more serious mechanical stress/strain of electrodes in SIBs caused by larger Na + (1.02 Å vs. 0.76 Å for Li + ) need special concern. [9][10][11][12][13] Therefore, it is highly required to develop an anode with excellent structural integrity to accommodate larger Na + .…”

Novel core–shell nanoclusters composed of multiple nickel–cobalt-oxyselenide nanowires wrapped with NiCo-LDH nanosheets for high energy density supercapacitors

“…In recent years, transition metal selenides (TMSes) have been widely used in supercapacitors due to their excellent redox activity and cycling stability. 1,2 However, in electrochemical performance tests, the active Se utilization of TMSe is low and it eventually turns into the corresponding hydroxide, leading to a decrease in electrode conductivity. 3 Conductivity is one of the important parameters determining electrochemical performance, and a lower conductivity leads to the rapid decay of performance at high current densities, i.e., poor multiplicative performance.…”