Hierarchical structure Ni3S2/Ni(OH)2 nanoarrays towards high-performance supercapacitors

Hierarchical Design of Co(OH)2/Ni3S2 Heterostructure on Nickel Foam for Energy Storage

“…When it extends to 40 min, the continuous excessive aggregation of Ni 3 S 2 leads to disorderly accumulation and the destruction of the partial structures of Co(OH) 2 (Figure 5f). The above inference can also be confirmed from the GCD curve (2 mA cm −2 ) in Figure 4b on the premise of the same discharge current density: the longer the discharge time, the greater the Cs of the electrode [28]. Figure 4c also lists the Cs of the four electrodes at current densities of 2-60 mA cm −2 , which fully confirms that the Cs of the Co(OH)2/Ni3S2 electrode was significantly enhanced compared with any single component.…”

“…According to the comparison and analysis of the above data, in addition to being the active component of the composite electrode, Co(OH)2 also provides support for the deposition of Ni3S2. At the same time, in general, the larger the loading amount of Ni3S2, the more active sites provided, and therefore, the more extensive the areal Cs [28], such as S-20 > S-10 > S-1. However, with the excessive aggregation of Ni3S2, the nanoflake structure of Co(OH)2 is completely covered or even destroyed (Figure 5f).…”

MOF-Derived Ultrathin NiCo-S Nanosheet Hybrid Array Electrodes Prepared on Nickel Foam for High-Performance Supercapacitors

“…For the N-S/NF electrode material, the redox peaks were located at 0.25 and 0.11 V, respectively, and the related redox reaction may be explained as follows [ 41 , 42 ]: …”

Effects of chemical composition and vacant oxygen defects on the performance of Ni(OH)2–Ni0.85Se heterostructure nanowires as supercapacitor electrodes

“…Next we investigated the electrochemical properties of the composites, where the electrochemical properties of the composites were measured by CV and GCD methods in a three-electrode system. 32 According to Table S4 (ESI†), the Ni(OH) 2 –Ni 0.85 Se heterogeneous structure has the best electrochemical performance and the highest specific capacitance after 4 hours of selenization, so we chose the material with Ni(OH) 2 –Ni 0.85 Se-4h for comparative analysis with Ni(OH) 2 and Ni 0.85 Se. Fig.…”

“…Next we investigated the electrochemical properties of the composites, where the electrochemical properties of the composites were measured by CV and GCD methods in a three-electrode system. 32 According to Table S4 (ESI †), the Ni(OH) 2 -Ni 0.85 Se heterogeneous structure has the best electrochemical performance and the highest specific capacitance after 4 hours of selenization, so we chose the material with Ni(OH) 2 -Ni 0.85 Se has the highest specific capacitance of 2480.7 F g À1 at 1 A g À1 , 1756 F g À1 at 10 A g À1 , and a capacitance retention rate of 63.2%. According to the electrochemical analysis data in Tables S3 and S4 (ESI †), the XPS data analysis shows that the proportion of Ni 0.85 Se component increases with an increase in selenization time.…”