Dataset Information

Plasma Enabled Fe₂O₃/Fe₃O₄ Nano-aggregates Anchored on Nitrogen-doped Graphene as Anode for Sodium-Ion Batteries.

ABSTRACT: Low electrical conductivity severely limits the application of Fe₂O₃ in lithium- and sodium-ion batteries. In respect of this, we design and fabricate Fe₂O₃/Fe₃O₄ nano-aggregates anchored on nitrogen-doped graphene as an anode for sodium-ion batteries with the assistance of microwave plasma. The highly conductive Fe₃O₄ in the composite can function as a highway of electron transport, and the voids and phase boundaries in the Fe₂O₃/Fe₃O₄ heterostructure facilitate Na⁺ ion diffusion into the nano-aggregates. Furthermore, the Fe-O-C bonds between the nano-aggregates and graphene not only stabilize the structural integrity, but also enhance the charge transfer. Consequently, the Fe₂O₃/Fe₃O₄/NG anode exhibits specific capacity up to 362 mAh g^-1 at 100 mA g^-1, excellent rate capability, and stable long-term cycling performance. This multi-component-based heterostructure design can be used in anode materials for lithium- and sodium-ion batteries, and potential opens a new path for energy storage electrodes.

SUBMITTER: Wang Q

PROVIDER: S-EPMC7221635 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature

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Plasma Enabled Fe2O3/Fe3O4 Nano-aggregates Anchored on Nitrogen-doped Graphene as Anode for Sodium-Ion Batteries.

Wang Qianqian Q Ma Yujie Y Liu Li L Yao Shuyue S Wu Wenjie W Wang Zhongyue Z Lv Peng P Zheng Jiajin J Yu Kehan K Wei Wei W Ostrikov Kostya Ken KK

Nanomaterials (Basel, Switzerland) 20200418 4

Low electrical conductivity severely limits the application of Fe2O3 in lithium- and sodium-ion batteries. In respect of this, we design and fabricate Fe2O3/Fe3O4 nano-aggregates anchored on nitrogen-doped graphene as an anode for sodium-ion batteries with the assistance of microwave plasma. The highly conductive Fe3O4 in the composite can function as a highway of electron transport, and the voids and phase b ...[more]

PMID: 32325784

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Project description:Li-S batteries (LSBs) require a minimum 6 mAh cm-2 areal capacity to compete with the state-of-the-art lithium ion batteries (LIBs). However, this areal capacity is difficult to achieve due to a major technical issue-the shuttle effect. Nonpolar carbon materials limit the shuttle effect through physical confinement. However, the polar polysulfides (PSs) only provide weak intermolecular interactions (0.1-0.7 eV) with these nonpolar carbon materials. The physically encapsulated PSs inside the nonpolar carbon scaffold eventually diffuses out and starts shuttling. Chemically interactive hosts are more effective at interacting with the PSs due to high binding energies. Herein, a multifunctional separator coating of nitrogen-doped multilayer graphene (NGN) and -SO3 - containing Nafion (N-NGN) is used to mitigate PS shuttling and to produce a high areal capacity LSB. The Nafion is used as a binder instead of PVDF to provide an additional advantage of -SO3 - to chemically bind the PS. The motive of this research is to investigate the effect of highly electronegative N and -SO3 - (N-NGN) in comparison with the -OH, -COOH, and -SO3 - groups from a hydroxyl graphene and Nafion composite (N-OHGN) to mitigate PS shuttling in LSBs. The highly conductive doped graphene architecture (N-NGN) provides efficient pathways for both electrons and ions, which accelerates the electrochemical conversion at high sulfur loading. Moreover, the electron-rich pyridine N and -SO3 - show strong chemical affinity with the PS through polar-polar interactions, which is proven by the superior electrochemical performance and density functional theory calculations. Further, the N-NGN (5 h) produces a maximum areal capacity of 12.0 and 11.0 mAh cm-2, respectively, at 15 and 12 mg cm-2 sulfur loading. This areal capacity limit is significantly higher than the required areal capacity of LSBs for commercial application, which shows the significant strength of N-NGN as an excellent separator coating for LSBs.

Dataset Information

Plasma Enabled Fe₂O₃/Fe₃O₄ Nano-aggregates Anchored on Nitrogen-doped Graphene as Anode for Sodium-Ion Batteries.

Publications

Plasma Enabled Fe<sub>2</sub>O<sub>3</sub>/Fe<sub>3</sub>O<sub>4</sub> Nano-aggregates Anchored on Nitrogen-doped Graphene as Anode for Sodium-Ion Batteries.

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