NDLI: Three-dimensional mesoporous $γ-Fe_{2}O_{3}$@carbon nanofiber network as high performance anode material for lithium- and sodium-ion batteries

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Three-dimensional mesoporous $γ-Fe_{2}O_{3}$@carbon nanofiber network as high performance anode material for lithium- and sodium-ion batteries

Content Provider	Scilit
Author	Su, Yong Fu, Bi Yuan, Guolong Ma, Ming Jin, Hongyun Xie, Shuhong Li, Jiangyu
Copyright Year	2019
Description	Journal: Nanotechnology Electrode materials that can function well in both lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) are desirable for electrochemical energy storage applications, especially under high rate. In this work, three-dimensional (3D) mesoporous γ-Fe2O3@carbon nanofiber (γ-Fe2O3@CNF) mat has been synthesized by sol-gel based electrospinning and carbonization successfully. It delivers specific capacity of 820 mAh g-1 at 0.5 C after 250 cycles, 430 mAh g-1 at 6 C after 1000 cycles, and 222 mAh g-1 at ultrahigh rate of 60 C for LIBs, while for SIBs it delivers a specific capacity of 360 mAh g-1 at 1C after 1000 cycles and 130 mAh g-1 at 60 C. Besides, the result of ex-situ microstructure examination shows the polycrystalline nature of γ-Fe2O3 nanoparticle is still existed in LIB even after 1000 cycles, while vanished in SIB, suggesting that the relatively larger volume expansion occurred during Na+ insertion/deinsertion, resulting in pulverization of the particles. The CNF network still maintained its pristine 3D nanostructure, which is not only demonstrated that fast ion transmission channel is important for Li+ and Na+ insertion/deinsertion, but also act as an electrical bridge between Li+/Na+ and γ-Fe2O3 nanoparticles that decreases the impedance and buffers the volume expansion, resulting enhanced electrochemical cyclic and rate capability.
Related Links	https://iopscience.iop.org/article/10.1088/1361-6528/ab6433/pdf
ISSN	09574484
e-ISSN	13616528
DOI	10.1088/1361-6528/ab6433
Journal	Nanotechnology
Issue Number	15
Volume Number	31
Language	English
Publisher	IOP Publishing
Publisher Date	2019-12-19
Access Restriction	Open
Subject Keyword	Journal: Nanotechnology Insertion/deinsertion
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Mechanics of Materials Mechanical Engineering Bioengineering Electrical and Electronic Engineering

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