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Open AccessArticle

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

1
School of Electronic and Optical Engineering Nanjing University of Posts and Telecommunications, Nanjing 210023, China
2
School of Chemistry and Physics, Queensland University of Technology, Brisbane QLD 4000, Australia
3
CSIRO-QUT Joint Sustainable Processes and Devices Laboratory P.O. Box 218, Lindfield NSW 2070, Australia
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 782; https://doi.org/10.3390/nano10040782
Received: 4 April 2020 / Revised: 15 April 2020 / Accepted: 16 April 2020 / Published: 18 April 2020
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. View Full-Text
Keywords: iron oxide; graphene; phase boundary; plasma; sodium-ion battery iron oxide; graphene; phase boundary; plasma; sodium-ion battery
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MDPI and ACS Style

Wang, Q.; Ma, Y.; Liu, L.; Yao, S.; Wu, W.; Wang, Z.; Lv, P.; Zheng, J.; Yu, K.; Wei, W.; Ostrikov, K.K. Plasma Enabled Fe2O3/Fe3O4 Nano-aggregates Anchored on Nitrogen-doped Graphene as Anode for Sodium-Ion Batteries. Nanomaterials 2020, 10, 782.

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