A low-cost NiSe2 derived from waste nickel foam as a high-performance anode for sodium ion batteries

NiSe2 Nanoparticles Decorated on Carbon Nanosheet Arrays as Anodes for Sodium Storage

“…18 In the second cycle, the reduction peaks shift to two new peaks situated at 1.44 and 1.10 V, while the oxidation peak is split into two peaks at a low voltage of 1.79 and 1.90 V correlating to the multiple-step sodium ion removal process. 24,59 A similar phenomenon is also found in previously reported literature, which is mainly attributed to the structural rearrangement of the electrode materials and the decomposition of electrolytes to form the SEI in the initial cycle. 60 Besides, a pair of redox peaks at 0.07/0.20 V are observed, which are probably ascribed to the sodium ion insertion and extraction into/from the carbon cloth substrate.…”

“…Figure A displays the first three cycles of CV profiles for the NiSe 2 /C-2G-500 electrode within the voltage range of 0.01–3.0 V tested at a scan rate of 0.1 mV s –1 . During the first cathodic scan, the strong reduction peak at around 1.30 V is ascribed to the intercalation of sodium ions into NiSe 2 to form Na x NiSe 2 , while the weak and broad peak at around 0.60 V is attributed to the further conversion reaction of Na x NiSe 2 to metallic Ni and Na 2 Se, and the formation of an irreversible solid electrolyte interface (SEI) film. ,, In the first anodic scan, the predominant oxidation peak at 2.00 V with a shoulder correlates to the desodiation process with the regeneration of NiSe 2 from metallic Ni and NaSe 2 . In the second cycle, the reduction peaks shift to two new peaks situated at 1.44 and 1.10 V, while the oxidation peak is split into two peaks at a low voltage of 1.79 and 1.90 V correlating to the multiple-step sodium ion removal process. , A similar phenomenon is also found in previously reported literature, which is mainly attributed to the structural rearrangement of the electrode materials and the decomposition of electrolytes to form the SEI in the initial cycle .…”

“…During the first cathodic scan, the strong reduction peak at around 1.30 V is ascribed to the intercalation of sodium ions into NiSe 2 to form Na x NiSe 2 , while the weak and broad peak at around 0.60 V is attributed to the further conversion reaction of Na x NiSe 2 to metallic Ni and Na 2 Se, and the formation of an irreversible solid electrolyte interface (SEI) film. ,, In the first anodic scan, the predominant oxidation peak at 2.00 V with a shoulder correlates to the desodiation process with the regeneration of NiSe 2 from metallic Ni and NaSe 2 . In the second cycle, the reduction peaks shift to two new peaks situated at 1.44 and 1.10 V, while the oxidation peak is split into two peaks at a low voltage of 1.79 and 1.90 V correlating to the multiple-step sodium ion removal process. , A similar phenomenon is also found in previously reported literature, which is mainly attributed to the structural rearrangement of the electrode materials and the decomposition of electrolytes to form the SEI in the initial cycle . Besides, a pair of redox peaks at 0.07/0.20 V are observed, which are probably ascribed to the sodium ion insertion and extraction into/from the carbon cloth substrate. , In the third cycle, the two reduction peaks at 1.44 and 1.10 V move to 1.43 and 1.07 V, and the oxidation peak at 1.94 V changes to 1.90 V, which might be caused by the rearranged material structure formed in the electrode after the first and second cycles .…”

Freestanding V 5 O 12 · 6H 2 O‐CNTs composite films as cathode for foldable aqueous zinc‐ion batteries

“…At a scan rate of 0.5 mV s À1 , 79% of the total charge is assigned to the capacitive contributions, which illustrates the excellent rate capability of the VOH-CNTs cathode (Figure 4C). 42,43 At various scan rates, the percentage of capacitive contributions gradually dominates as a high scanning rate that increased from 70% to 87%, benefiting fast charge transfer dynamics (Figure 4D). 44,45 The typical GITT curves are displayed in Figure 4E.…”

Stabilizing BiOCl/Ti3C2Txhybrids for potassium-ion batteriesviasolid electrolyte interphase reconstruction

“…The structural design of materials is the main factor affecting their properties. [16][17][18][19][20] Two-dimensional (2D) van der Waals heterostructures with the integrated advantages of two 2D nanomaterials are an emerging electrode material system in the field of energy storage. [21][22][23][24][25][26] It is worth noting that bismuth oxychloride (BiOCl) features a layered structure with [Cl-Bi-O-Bi-Cl] slices stacking through the weak van der Waals interaction among adjacent Cl layers.…”