Hierarchical Co₃O₄@Co₉S₈ nanowall structures assembled by many nanosheets for high performance asymmetric supercapacitors

Abstract

Herein, we report hierarchical Co3O4@Co9S8 nanowalls assembled by many nanosheets.

Sedgelike Porous Co3O4 Nanoarrays as a Novel Positive Electrode Material for Co3O4 || Bi2O3 Asymmetric Supercapacitors

“…The overall rate-dependent areal as well as mass specific capacitance is presented in Figure B. The achieved charge storage efficiency of Co 3 O 4 || Bi 2 O 3 ASC device here is found to be very high as compared to few already reported Co 3 O 4 -based asymmetric devices. − Further, the specific capacity ( C sc ) values of the ASC device at different applied current densities of 6 to 48 mA cm –2 were calculated by using eq where i (mA) is the applied current, Δ t (sec) is the discharging time at a particular current density, and m (mg) is the total mass of both the active electrode materials. The plot of specific capacity values of the Co 3 O 4 || Bi 2 O 3 ASC device at various applied current densities is presented in Figure S10 in the Supporting Information.…”

Highly dispersive Co3O4nanoparticles incorporated into a cellulose nanofiber for a high-performance flexible supercapacitor

“…9 However, in the development of pseudocapacitive materials with theoretical specific capacitance, achieving flexibility and stability remains challenging but will yield more practical values on a commercial scale. 11,12 Because of their variable electronic structures, high theoretical capacitance, and low cost, transition metal oxides (TMOs), including NiO, 13 ZnO, 14 MnO 2 , 15 WO 3 , 16 RuO 2 , 17 and Co 3 O 4 , 18,19 have received immense attention as promising flexible electrode materials for SCs based on the conversion reaction mechanism with superior capacitive behavior. 20 However, the low intrinsic electronic conductivity and aggregation phenomena exhibited by TMOs restrict their electrochemical performance in high-performance SCs and prevent their commercialization.…”

Nanohybridization of Ni–Co–S Nanosheets with ZnCo2O4 Nanowires as Supercapacitor Electrodes with Long Cycling Stabilities

“…Recently, the transition metal oxide ZnCo 2 O 4 has been extensively studied because of its higher specific capacitance than those of ZnO and Co 3 O 4 materials. − For instance, Liu et al prepared ZnCo 2 O 4 nanorods using a scalable solution approach and obtained a specific capacity of 560 C g –1 . In a previous report, we fabricated ZnCo 2 O 4 nanorods with a capacitance of 0.75 C cm –2 .…”