Journal
APPLIED SURFACE SCIENCE
Volume 563, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2021.150411
Keywords
Flower-like microspheres NiCo2O4; Thiol-ene dick chemistry; Ion-buffering reservoirs; Vines-grapes-like Fe3O4; Aqueous Ni-Fe batteries
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Funding
- Science and Technology Project of Henan Province [192102210048]
- Ph.D. Research Start-up Fund of Anyang Institute of Technology [BSJ2019033]
- National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2020R1I1A307096212]
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Aqueous rechargeable Ni-Fe batteries were fabricated using modified cathode and anode materials, showing excellent capacity and energy density.
Aqueous rechargeable secondary Ni-Fe batteries have attracted extensive attention due to low cost, relatively outstanding safety and high energy density. However, the nickel/iron electrode materials also suffer from poor conductivity and week cycling performance. In this study, we have modified the CNT-S-PEGm as electron transport channels with methoxypolyethylene glycol (mPEG) via thiol-ene click to further provide more reactive sites, and then prepared the cathode materials of 3D flower-like hierarchical microspheres of NiCo2O4-CNT-S-PEGm composites by a solvothermal method. The as-prepared cathode materials reveal the capacity of 195.7 mAh g(-1) at 0.5 A g(-1). In addition, the anode materials of vines-grapes-like Fe3O4-N-rGO-CNT>N-PEGm (Fe3O4-NGC) ternary composites have been prepared in a typical hydrothermal method. Notably, the promising Fe3O4-NGC anode materials exhibit the highest capacity of 308.1 mAh g(-1) at 1 A g(-1). Due to such excellent attributes, the alkaline aqueous rechargeable Ni-Fe batteries of NiCo2O4-CNT-S-PEGm//Fe3O4-NGC have been successfully fabricated. Moreover, the as-assembled device displays the high capacity of 77.8 mAh g(-1) at 0.5 A g(-1) and the energy density of 64.4 Wh kg(-1) at 414 W kg(-1) for potential energy storage.
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