The Synergistic Effect of MoS₂ and NiS on the Electrical Properties of Iron Anodes for Ni-Fe Batteries.

ABSTRACT: In this paper, a series of Fe₃O₄/MoS₂/NiS composite electrodes were synthesized by a simple coprecipitation method. The influence of different ratio additives (MoS₂ and NiS) on the performance of iron anodes for Ni-Fe batteries was systematically investigated. In this paper, the mixed alkaline solution of 6 mol/L NaOH and 0.6 mol/L LiOH was used as electrolyte, and sintered Ni(OH)₂ was used as counterelectrode. The experimental results show that the MoS₂ and NiS additives can effectively eliminate the passivation phenomena in iron electrodes, reduce the electrode polarization, and increase the reversibility capacity. As a result, the Fe₃O₄/MoS₂/NiS composite electrodes exhibit a high specific capacity, good rate performance, and long cycling stability. Especially, the Fe₃O₄/MoS₂ (5%)/NiS (5%) electrode with a suitable ratio of additives can provide excellent electrochemical performance, with high discharge capacities of 657.9 mAh g^-1, 639.8 mAh g^-1, and 442.1 mAh g^-1 at 600 mA g^-1, 1200 mA g^-1, and 2400 mA g^-1, respectively. This electrode also exhibits good cycling stability.

SUBMITTER: Tang H 

PROVIDER: S-EPMC9565254 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature