Optimization of heating temperature on the growth of manganese sulfide nanosheets binder-free electrode for supercapattery

Abstract

Supercapattery has emerged as one of the possibilities in the electrochemical energy storage system as a consequence of the expansion of technological advancement and the electrical vehicle sector. Manganese sulphide (MnS) nano akes were produced by hydrothermal technique at various heating temperatures (100,110,120, and 130 o C). The existence of MnS is revealed by the X-ray diffraction (XRD) diffractogram, and α-and γ-MnS crystals were effectively grown on a nickel (Ni) foam. MnS nano akes were seen under eld-emission scanning electron microscope (FESEM). The crystalline structure of MnS nano akes is susceptible to the variation depending on the heating temperature, and at 120 o C MnS produced nano ake with additional wrinkles. Through Brunauer-Emmett-Teller(BET) analysis, the thermal and physical adsorption investigations demonstrated the high total surface area and thermal stability of MnS electrodes. The ndings of BET studies demonstrate that MnS-120 has the highest surface BET (SBET) and the smallest pore size distribution (PSD),which later increases the total surface area of MnS nano akes for an effective energy storage mechanism. MnS is structurally stable below 200 o C, according to thermogravimetric analysis (TGA). MnS-120 electrode has a maximum speci c capacity of 1003.5 C/g at 5 A/g and a 49% rate capability. Supercapattery devices were created in a MnS-120//activated carbon (AC) con guration to assess the real-time performance of the material. The MnS-120//AC demonstrated better e ciency by offering speci c energy of 69.24 Wh/kg at 2953 W/kg. The life cycle test con rmed that MnS-120//AC is stable with a capacity retention of value of 96% after 4000 cycles.

Synthesis and electrochemical application of two-dimensional manganese-based materials

“…2a and b). 79 Brunauer–Emmett–Teller analysis indicated that the MnS synthesized at 120 °C (MnS-120) showcased the most extensive specific surface area and the narrowest pore size distribution among the samples. Through comparative electrochemical evaluations, MnS-120 was identified to outperform its counterparts produced at 100 °C, 110 °C, and 130 °C in terms of energy storage capabilities.…”