Molybdenum-Doped Nickel Disulfide (NiS₂:Mo) Microspheres as an Active Anode Material for High-Performance Durable Lithium-Ion Batteries

Abstract

Transition-metal sulfides (TMSs) are promising anode materials for lithium-ion batteries (LIBs) as they exhibit anomalously high specific capacities. However, the electrodes made on TMSs possess low electronic conductivity and poor specific capacity retention, which hinder their application in LIBs. Herein, we report a one-step, simple, hydrothermal technique for synthesizing molybdenum-doped nickel disulfide (NiS2:Mo) microspheres with varying Mo contents (0, 5, and 10 wt %) and their performance as anode materials in LIBs. Mo doping was found to improve the electronic conductivity, structural stability, and reduce charge transfer resistance between the electrode/electrolyte interface of NiS2 microspheres, thereby achieving a superior electrochemical performance in LIBs. The anode made of NiS2:Mo microspheres with 5 wt % Mo registered a maximum specific capacity and cycling durability. It delivered an outstanding initial specific capacity of 1605 mAh g–1 at 0.1 Ag–1 and exhibited exceptional cycling stability with a reversible discharge capacity retention of 713.3 mAh g–1 after 120 cycles and Coulombic efficiency of 98.42%. Such exceptionally high specific capacity and high charge–discharge capacity retention of the NiS2:Mo (5%) microspheres indicate that the material is a promising anode material for LIBs and other advanced energy storage applications.

Mo3S13 Chalcogel: A High‐Capacity Electrode for Conversion‐Based Li‐Ion Batteries

“…Moreover, these materials offer a high gravimetric capacity similar to sulfur-based electrodes, given that the conversion of sulfur into lithium sulfide is the plausible mechanism in LiSBs. [12,[15][16][17] Several transition metal sulfides have been employed as conversion-based LiSBs electrode materials, including: α-MnS, [18] FeS, [19] Co 9 S 8 , [20] NiS, [21] and Ni 3 S 2; [22] transition metal disulfides, FeS 2 , [23] CoS 2 , [24] Mo-doped NiS 2 , [25] MoS 2 , [26] WS 2 , [27] ZrS 2 , [28] and VS 2 ; [29] and transition metal trisulfides, amorphous MoS 3 , [30] and WS 3 . [31] However, the lack of cyclic stability of these metal sulfides during the charge-discharge process limits their application in LiSBs.…”

An Efficient and Durable Electrocatalyst Based on Strongly Coupled Pt Nanoparticles on CeO2 Microspheres for CO-Resilient Methanol Oxidation

“…42 Previously, we demonstrated the use of the Piper longum fruit extract for synthesizing uniform metal oxide nano/microstructures such as Cu 2 O and NiS 2 microspheres, which showed remarkably high electrochemical performance in Li-ion batteries (LIBs). 43,44 In the present study, we report on the synthesis of a Pt/ CeO 2 composite with good dispersion of Pt NPs over CeO 2 microspheres by a two-step synthesis approach using the hydrothermal and chemical reduction process. The hydrothermal synthesis of CeO 2 microspheres was performed using the Piper longum fruit extract, which is a natural and environmentally friendly solvent.…”

“…During the past two decades, efforts have been made to utilize green and eco-friendly media such as the extracts of different plants, fruits, and leaves as alternatives to the conventional chemical solvents, which also act as reductors and surfactants for the controlled synthesis of metal, semiconductor, and composite nanostructures. , In this aspect, piperine extracts from long pepper fruit are of particular interest, which have been applied for synthesizing different nanostructured materials, including metal, metal oxide, and metal–metal oxide composites. , The polyphenol groups in piperine extracts are known to be responsible for reducing metal ions and the subsequent stabilization of the formed nanostructures . Previously, we demonstrated the use of the Piper longum fruit extract for synthesizing uniform metal oxide nano/microstructures such as Cu 2 O and NiS 2 microspheres, which showed remarkably high electrochemical performance in Li-ion batteries (LIBs). , …”