Porous NiS2 nanosheets anchored on reduced graphene oxide as high-rate and long-life anode materials for sodium-ion batteries

Internal and External Cultivation Strategy toward Efficient Electrochemical Oxygen Evolution in Cobalt Pentlandite

“…observed at 731.6 and 720.2 eV are believed to correspond to Fe 2+ Sat. and Fe 3+ Sat., and similar to Co 2p, the characteristic peaks of Fe 2p 1/2 and Fe 2p 3/3 shifted to a lower energy level in V-CNFS/Ni 9 S 8 , indicating electron loss upon the introduction of vanadium atoms. − In terms of Ni 2p in Figure (d), two peaks were observed at 853.2 and 873.2 eV, corresponding to Ni 2p 3/2 and Ni 2p 1/2 , respectively, indicating the presence of Ni 2+ , while the peak located at 856.3 and 874.9 eV were assigned to Ni 2p 3/2 and Ni 2p 1/2 of Ni 3+ species, respectively. , Besides, the two peaks at 861.8 and 880.5 eV correspond to satellite peaks. Comparing V-CNFS/Ni 9 S 8 with CNFS, the binding energies of Ni 2p 1/2 in V-CNFS/Ni 9 S 8 displayed sequentially negative shifts like Co 2p and Fe 2p.…”

“…25−27 In terms of Ni 2p in Figure 3(d), two peaks were observed at 853.2 and 873.2 eV, corresponding to Ni 2p 3/2 and Ni 2p 1/2 , respectively, indicating the presence of Ni 2+ , while the peak located at 856.3 and 874.9 eV were assigned to Ni 2p 3/2 and Ni 2p 1/2 of Ni 3+ species, respectively. 28,29 Besides, the two peaks at 861.8 and 880.5 eV correspond to satellite peaks. Comparing V-CNFS/Ni 9 S 8 with CNFS, the binding energies of Ni 2p 1/2 in V-CNFS/Ni 9 S 8 displayed sequentially negative shifts like Co 2p and Fe 2p.…”

Overcoming copper-induced conversion reactions in nickel disulphide anodes for sodium-ion batteries

“…However, since the total amount of sulphur in both Cu 2 S and NiS 2 should remain equal to that of pristine NiS 2 , the capacity did not decrease; instead, a at plateau at 1.5 V appeared aer cycling. This plateau is characteristic of Cu 2 S. 28 Thus, the plateau at 1.5 V likely originates from Cu 2 S. The capacity aer cycling was derived from both NiS 2 and Cu 2 S, and the total amount of sulphur should be the same as that in pristine NiS 2 . This phenomenon may be associated with the good cycling properties observed.…”

“…Much research has focused on relieving this stress by developing novel nanostructures for the NiS 2 electrode. Specifically, NiS 2 powder has been prepared with carbon materials, such as carbon coatings, 21 carbon nanosheet arrays, 22 carbon microtubes, 23 carbon nanobers, 24,25 graphene, [26][27][28] and bifunctional carbon coatings. 29 Electrodes with these novel carbon nanostructures have shown improved cycling properties.…”

Research Progress and Modification Measures of Anode and Cathode Materials for Sodium‐Ion Batteries

“…With the continuous development of sodium ion battery technology, its application prospects in the field of energy storage have also received attention, and Table 1 summarizes some relevant materials reported at present. [176][177][178] The potential applications of sodium ion batteries mainly include electric vehicles, energy storage systems, and other fields. At the same time, many researchers are committed to finding new cathode and electrolyte materials, improving battery design to improve battery performance.…”