Self-assembled monodisperse FeSe₂ microflowers as an advanced anode material for sodium ion batteries

Abstract

Transition-metal selenides have aroused great interest towards their application in sodium-ion batteries (SIBs) due to their high theoretical capacities and good cycling stability. Here, monodisperse FeSe2 microflowers assembled from closely...

Constructing SnO2–MoSe2heterojunction nanoflowers as high-rate and ultrastable anodes for sodium-ion half/full batteries

“…Even at a large current density of 20 A g −1 , a similar curve prole is maintained, indicating that the heterojunction provides fast reaction kinetics, which means that the structure can withstand high stress. Fig.3fdisplays that the rate capability of SnO 2 /MoSe 2 is superior to most previously reported studies 18,[27][28][29][30][31][32][33]. Fig.…”

“…3f displays that the rate capability of SnO 2 /MoSe 2 is superior to most previously reported studies. 18,27–33 Fig. 3g compares the long-term cycle performance of SnO 2 /MoSe 2 , SnO 2 and MoSe 2 at 10 A g −1 ; the SnO 2 /MoSe 2 heterojunction electrode still maintains a promising discharge capacity of 364.3 mA h g −1 after 5000 cycles, while MoSe 2 and SnO 2 only stop after 1000 and 200 cycles, respectively.…”

“…3f displays that the rate capability of SnO 2 /MoSe 2 is superior to most previously reported studies. 18,[27][28][29][30][31][32][33] initial few cycles. It further conrms that the heterojunction can effectively enhance the stability of the structure.…”

Self-assembled nanoflower-like FeSe2/MoSe2 heterojunction anode with enhanced kinetics for superior-performance Na-ion half/full batteries

“…9,10 Sodium ion batteries (SIBs) have attracted increasing attention as a large-scale energy storage device due to their abundant resources and similar performance to LIBs. [11][12][13][14] However, the large-sized Na + (1.02 vs. 0.76 Å for Li + ) ion causes volume expansion and structural collapse of the material during insertion and conversion, resulting in decreased rate and stability of the battery. [15][16][17] Therefore, there is an urgent need to design and construct suitable electrode materials as anodes for SIBs.…”