Facile synthesis of MnCo₂S₄ nanosheets as a binder-free electrode material for high performance supercapacitor applications

Abstract

This paper reported an easy synthesis of MnCo2S4 (MCS) nanosheets by a one-pot solvothermal method for high performance supercapacitor electrode material applications. The obtained MCS nanosheets with an ultrathin thickness...

Reverse voltage pulse deposition of a porous polyaniline/Mn–Co sulfide composite cathode material for modified Zn-ion hybrid supercapacitors

“…42,43 The well-defined diffraction peaks at about 30.8°, 31.4°, 38.3°, 50.2° and 55.3° are indexed to (311), (222), (400), (511) and (440) planes of the spinel MnCo 2 S 4 structure, respectively (JCPDS card no: 73-1703), as observed in the previous report. 40,44 Besides, it can be seen that the peaks with low intensity at 35.4°, 47.0° and 54.7° correspond to the hexagonal CoS (JCPDS 65-3418). 45 In addition, no other peaks related to impurities were found.…”

“…Regarding the electrode materials based on transition-metal sulfides and conducting polymers, they have shown to contribute high specific capacitances. 38–41 However, metal sulfide compounds often exhibit good electrochemical properties in supercapacitor systems using alkaline electrolyte solutions ( e.g. KOH, NaOH).…”

High electrochemical performance of ink solution based on manganese cobalt sulfide/reduced graphene oxide nano-composites for supercapacitor electrode materials

“…In our recent study, the MCS-single nanosheet material only maintained 93% capacitance retention after 5000 duty cycles. 16 Therefore, the MCS material is degraded after undergoing a reversible redox reaction. Fig.…”

“…[9][10][11][12] Owing to their high electrical conductivity, large theoretical specic capacitance, and low cost, transition metal suldes such as CoS, MnS, NiS, MoS, CuCo 2 S 4 and MnCo 2 S 4 have drawn growing attention as intriguing electrode materials for SCs. 5,[13][14][15][16] Among them, binary metal suldes have attracted more interest due to their multiple faradaic redox reactions. 3 Furthermore, these sulde compounds present higher electrical conductivity than their monometal sulde or oxide counterparts because the introduction of sulfur reduces the band-gap and facilitates electron transport.…”

Design and development of a porous nanorod-based nickel-metal–organic framework (Ni-MOF) for high-performance supercapacitor application

“…Supercapacitors (SCs), also known as electrochemical capacitors, offer the advantages of batteries as well as conventional capacitors, and have consequently become extraordinary energy-storage devices for large power output applications. 7,8 SCs generally offer a fast charging–discharging process (1–10 s), large power density (500–10 000 W kg −1 ), high cycling stability (>500 000 h), and easy operation. However, current SCs have a low energy density (1–10 W h kg −1 ), which remains a prime challenge in the development of SC technologies.…”