N-Doped hollow Fe_0.4Co_0.6S₂@NC nanoboxes derived from a Prussian blue analogue as a sodium ion anode

Abstract

Herein, a bimetallic sulfide Fe0.4Co0.6S2@NC nanobox was prepared via a simple two-step synthetic route. The N-doped carbon coated hollow nanobox was derived from Prussian blue analogue (PBA) and applied for...

Prussian Blue Analogue Derived CoS2/FeS2 Confined in N, S Dual-Doped Carbon Nanofibers for Sodium Storage

“…The electrochemical performance of the optimal H-CoS 2 /FeS 2 @CNFs-2 electrode was evaluated by CV and GCD within the voltage range of 0.01–3.0 V. Figure A shows the CV curves of H-CoS 2 /FeS 2 @CNFs-2 at a scan rate of 0.1 mV s –1 , while the comparative CV curves of H-CoS 2 /FeS 2 are given in Figure S9 for better clarification. During the first cathodic scan, a distinct reduction peak centered at 1.12 V is assigned to the insertion of Na + into CoS 2 /FeS 2 to generate Na x CoS 2 /Na y FeS 2 . , The broad peaks ranging from 0.84 to 0.45 V can most likely be attributed to the multistep conversion reaction to form metallic Co 0 , Fe 0 , and Na 2 S, in conjunction with the decomposition of an electrolyte forming a solid electrolyte interface (SEI) film . In addition, a sharp and tiny peak was identified at 0.03 V, which can probably be ascribed to Na + intercalation into the carbon layer.…”

“…17,59 The broad peaks ranging from 0.84 to 0.45 V can most likely be attributed to the multistep conversion reaction to form metallic Co 0 , Fe 0 , and Na 2 S, in conjunction with the decomposition of an electrolyte forming a solid electrolyte interface (SEI) film. 60 In addition, a sharp and tiny peak was identified at 0.03 V, which can probably be ascribed to Na + intercalation into the carbon layer. In the corresponding anodic scan, a tiny oxidation peak located at 0.06 V is correlated to the Na + deintercalation from the carbon layer.…”

Bimetallic sulfide/N-doped carbon composite derived from Prussian blue analogues/cellulose nanofibers film toward enhanced oxygen evolution reaction

“…42-1340), verifying the introduction of Fe ions into NiS 2 through replacing part of the Ni ions, which formed a NiS 2 -FeS 2 sosoloid phase. 31 The ICP results (Table S1 †) of the samples showed the molar ratios of Ni/Fe in Fe 0.4 Ni 0.6 S 2 /NC-DF, Fe 0.4 Ni 0.6 S 2 /NC-DA, and Fe 0.4 Ni 0.6 S/NC NPs were 1.416, 1.468, and 1.407, respectively, which were comparable to the feeding ratio in the precursors (1.50). The morphologies of the specimens were unveiled by means of SEM and TEM.…”