Potential transition and post-transition metal sulfides as efficient electrodes for energy storage applications: review

Abstract

Electrochemical energy storage has attracted much attention due to the common recognition of sustainable energy development.

Construction of thickness-controllable bimetallic sulfides/reduced graphene oxide as a binder-free positive electrode for hybrid supercapacitors

“…The Ni 0.5 Cu 0.5 S/50rGO electrode shows redox peaks at ∼0.39 V (oxidation) and 0.26 V (reduction) indicating the redox process. The figure shows one pair of redox peaks for each curve due to the reaction of the alkaline electrolyte with the active materials of the electrode as follows: 81–83 NiS + OH − → NiS–OH + e − CuS + OH − ↔ CuS–OH + e − NiCuS + 2OH − ↔ NiS–OH + CuS–OH + 2e − CuS–OH + 2OH − ↔ CuSO + H 2 O + e − NiS–OH + 2OH − ↔ NiSO + H 2 O + e − …”

“…The Ni 0.5 Cu 0.5 S/50rGO electrode shows redox peaks at ∼0.39 V (oxidation) and 0.26 V (reduction) indicating the redox process. The gure shows one pair of redox peaks for each curve due to the reaction of the alkaline electrolyte with the active materials of the electrode as follows: [81][82][83] NiS + OH − / NiS-OH + e − At a 5 mV s −1 scan rate, the NiS catalyst shows one oxidation peak at 0.43 V and CuS shows one oxidation peak at 0.37 V while Ni 0.5 Cu 0.5 S shows two oxidation peaks that were typical of secondary suldes. It was noticed that aer the incorporation of NiS and CuS, the redox peaks of the NiS electrode moved to a more negative position.…”

Enhanced electrochemical performance of the MoS2/Bi2S3 nanocomposite-based electrode material prepared by a hydrothermal method for supercapacitor applications

“…MoS 2 , Bi 2 S 3 , CuS, NiS, NiS 2 , Ni 3 S 2 , CoS, CoS 2 , CdS, SnS, and SnS 2 are all promising choices for supercapacitor electrodes due to their impressive electrochemical performances. [32][33][34][35][36] S. Jia et al developed a composite material NiCo-DHS, which exhibited a high specic capacity of 973.6C g −1 and remains durable over 8000 cycles, with only a small capacity loss of 7.4%. It achieved an energy density of 65.91 W h kg −1 and a power density of 0.89 kW kg −1 , demonstrating its considerable potential.…”

H2S Mediated One‐Pot Synthesis of Single Phase Hexagonal CoS Nano‐Spheres: A Pseudocapacitive Electrode for Hybrid Supercapacitors

“…Metal oxides and carbon-based materials [21] dominated research on supercapacitors (SCs) as efficient pseudocapacitive and EDLC electrode materials. Significant research is put into designing and creating several types of high-performance pseudocapacitive anode materials such as Fe 2 O 3 , [22] MoS 2 , [23] Co 3 O 4 [24] V 2 O 5 [25] MoO 3 [26] and transition-metal sulfides [27][28][29][30] in recent time. Due to their superior electrical conductivity, high thermal and mechanical stability, electrochemically rich redox reactions, and sulfur-facilitating improved ion transport, transition metal sulfides (TMS), in contrast to their oxide counterparts, have recently attracted attention and emerged as a new paradigm for supercapacitors.…”