Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 912, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.165135
Keywords
Li-ion batteries; Anode materials; Carbon nanotubes; Solvothermal method
Categories
Funding
- National Natural Science Foundation of China [51902213]
- Natural Science Foundation of Hebei Education Department [BJ2020046]
- Nature Science Foundations of Hebei Province [B2019210358]
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Bimetallic oxides have shown promise as anode materials for Li-ion batteries. In this study, carbon nanotubes were used to enhance the capacity and stability of ZnFe2O4/C nanoparticles. The addition of carbon nanotubes created a protective shell and three-dimensional channels, improving stability and electron/ion transfer.
In recent years, bimetallic oxides have been widely researched as promising anode materials of Li-ion batteries due to their superior electrochemical capacities compared with single transition metal oxides. However, the low interior conductivity and volume change upon cycling result in poor cycling stability. Here, carbon nanotubes (CNTs) have been employed in a solvothermal method to successfully boost the high capacity and superior cycling stability of ZnFe2O4/C nanoparticles. The effect of CNTs content on the structure, morphology, and electrochemical property of the composite has been investigated. At 200 mA g-1, ZnFe2O4/C/CNTs composite shows a high first discharge specific capacity of 1375.7 mAh g-1. After 100 cycles, the specific capacity can be still maintained at 1430.4 mAh g-1. The excellent electrochemical performance of ZnFe2O4/C/CNTs is attributed to the protective shell of carbon coating layer and three-dimensional channel constructed by high-conductive CNTs, which can alleviate volume change upon cycling and accelerate the transfer of electrons and lithium ions. This work provides a feasible idea for improving the properties of carbon-modified bimetallic oxide anode materials of secondary rechargeable batteries.(c) 2022 Published by Elsevier B.V.
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