Fe3S4@reduced graphene oxide composites as novel anode materials for high performance alkaline secondary batteries

High-performance Fe3S4@reduced graphene oxide (rGO) as a novel anode material for alkaline rechargeable battery is successfully achieved via a facile hydrothermal method. The structural and electrochemical properties of the Fe3S4@rGO composites are evaluated systematically. It is interestingly found that in-creasing GO content effectively decreases the particle size of Fe3S4 in the composites. As expected, the Fe3S4@rGO composite with 10% rGO shows better high-rate capability and excellent cycling stability than the pure Fe3S4. At the rates of 0.2 C, 1.0 C, 2.0 C, 5.0 C, 10 C and 20 C, the Fe3S4@(10%)rGO can present specific discharge capacities of similar to 343.6, similar to 299.6, similar to 273.5, similar to 247.4, similar to 220.5, and similar to 164.6 mAh g(-1), respectively. After 400 cycles at 1 C, the capacity loss is just approximately 3.2%. The improved performance is attributable to the addition of rGO and its high S content, eventually leading to more rapid charge transportation, enhanced reversibility, and a helpful porous anode structure. According to the outstanding electrochemical perfor-mance, it is believed that the Fe3S4@(10%)rGO is a competitive anode material to satisfy the requirements of rapid charge-discharge and long service life. Consequently, the present work offers a facile strategy to synthesize promising Fe3S4@rGO composite anode materials for alkaline secondary batteries. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

High-performance Fe3S4@reduced graphene oxide (rGO) composite has been successfully synthesized as a novel anode material for alkaline rechargeable batteries via a facile hydrothermal method. The Fe3S4@(10%)rGO composite demonstrates excellent high-rate capability and cycling stability at different rates. The addition of rGO and its high sulfur content contribute to improved battery performance by enhancing charge transportation speed and reversibility.