Multiple transition metals modulated hierarchical networks for high performance of metal-ion batteries

Searching anodes with excellent electrochemical performance has been in great demand for rechargeable metal ion batteries. In this contribution, Fe/Co co-doped NiS with N-based carbon (FeCo-NiS@NC) derived from trimetallic Prussian blue analogue is designed and synthesized. The composition can be easily adjusted and modulated by multi-metals. In addition, the well-designed carbon nanocubes effectively promote electronic conductivity and buffer the volume change upon charge and discharge cycling, resulting in good capacity and long-term cycle life for both lithium-ion batteries and sodium-ion batteries, with capacities of 1018 mAh g-1 (vs. Li/Li+) and 454 mAh g-1 (vs. Na/Na+), respectively, after 100 cycles. Kinetics studies indicate that the electrochemical behaviors are manipulated by both diffusion and pseudocapacitance processes. These strategies would open new opportunities and potention for novel energy storage. (c) 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.

Automated summary

In this study, Fe/Co co-doped NiS with N-based carbon derived from trimetallic Prussian blue analogue was designed and synthesized. The material exhibited excellent electrochemical performance, showing high capacity and long cycle life for both lithium-ion batteries and sodium-ion batteries. The electrochemical behaviors were found to be manipulated by both diffusion and pseudocapacitance processes.