Nanocoral arrays of Co(OH)F@NiCo-LDH/Co₉S₈ have been successfully synthesized onto nickel foam via a solvothermal method. The prepared heterostructured nanocage demonstrates outstanding electrochemical properties such as excellent specific capacitance (3409 mC cm⁻²at 1 mA cm⁻²) and superior capacity retention (96.38% retention after 7000 charge−discharge cycles at 10 mA cm⁻²). The asymmetrical supercapacitor fabricated by reduced graphene oxide and Co(OH)F@NiCo-LDH/Co₉S₈ showed an excellent energy density of 37.2 W h kg⁻¹ at a power density of 800 W kg⁻¹and superior capacity storage (87.63% retention after 5000 cycles of charge−discharge). This suggests that the composite has excellent performance for electrochemical supercapacitor applications. The unique combination of materials and structural design strategy employed highlight the significant advancements to develop high-performance supercapacitors, positioning this study at the cutting edge of nanomaterials research in energy applications.

The relevant research results are titled “Heterostructured Nanocoral-like Co(OH)F@NiCo-LDH/Co₉S₈ Nanocomposites as Electrodes for Supercapacitors”published in Chemical Engineering Journal ” is published in ACS Applied Nano Materials!.

Scheme 1. Synthesis Steps of the Composite Materials (CHF@CS/NF and CHF@NC-LDH/CS/NF)

Figure 1. (a) XRD spectra of Co(OH)F@NiCo-LDH (CHF@NC-LDH), Co(OH)F@Co3S4/NF (CHF@CS/NF), and Co(OH)F@NiCo-LDH/ Co₉S₈/NF (CHF@NC-LDH/CS/NF). (b) Wide-sweep. (c) Co 2p. (d) Ni 2p. (e) S 2p. (f) F 1s. XPS analysis of CHF@NC-LDH/CS/NF.

Figure 2. FESEM micrographs of (a, b) CHF/NF, (c, d) Co(OH)F@ZIF-67, (e, f) CHF@CS/NF, (g, h) CHF@NC-LDH/NF, and (i−l) CHF@ NC-LDH/CS/NF.

Title:Heterostructured Nanocoral-like Co(OH)F@NiCo-LDH/Co₉S₈ Nanocomposites as Electrodes for Supercapacitors

Author:Yezeng He, Lingfeng Li, Xiao He, Chao Liu, Tejraj Malleshappa Aminabhavi,^* Yasser Vasseghian,^* and Akbar Hojjati-Najafabadi^*

DOI:https://doi.org/10.1021/acsanm.4c01226