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Article

Microalgae-Templated Spray Drying for Hierarchical and Porous Fe3O4/C Composite Microspheres as Li-ion Battery Anode Materials

1
Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
2
Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
3
Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology, 101 Soho-ro, Jinju 52851, Korea
4
Intelligent Sensors Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Korea
5
Graduate School of Energy Science and Technology, Chungnam National University, Daejeon 34134, Korea
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Nanomaterials 2020, 10(10), 2074; https://doi.org/10.3390/nano10102074
Received: 14 September 2020 / Revised: 13 October 2020 / Accepted: 15 October 2020 / Published: 20 October 2020
(This article belongs to the Special Issue Emerging Nanomaterials for Lithium-Sulfur Batteries and Beyond)
A method of microalgae-templated spray drying to develop hierarchical porous Fe3O4/C composite microspheres as anode materials for Li-ion batteries was developed. During the spray-drying process, individual microalgae serve as building blocks of raspberry-like hollow microspheres via self-assembly. In the present study, microalgae-derived carbon matrices, naturally doped heteroatoms, and hierarchical porous structural features synergistically contributed to the high electrochemical performance of the Fe3O4/C composite microspheres, enabling a discharge capacity of 1375 mA·h·g−1 after 700 cycles at a current density of 1 A/g. Notably, the microalgal frameworks of the Fe3O4/C composite microspheres were maintained over the course of charge/discharge cycling, thus demonstrating the structural stability of the composite microspheres against pulverization. In contrast, the sample fabricated without microalgal templating showed significant capacity drops (up to ~40% of initial capacity) during the early cycles. Clearly, templating of microalgae endows anode materials with superior cycling stability. View Full-Text
Keywords: spray drying; microalgae; Fe3O4/C composite microsphere; hierarchical pore; Li-ion battery; anode spray drying; microalgae; Fe3O4/C composite microsphere; hierarchical pore; Li-ion battery; anode
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MDPI and ACS Style

Park, J.; Kim, J.; Jung, D.S.; Phiri, I.; Bae, H.-S.; Hong, J.; Kim, S.; Lee, Y.-G.; Ryou, M.-H.; Lee, K. Microalgae-Templated Spray Drying for Hierarchical and Porous Fe3O4/C Composite Microspheres as Li-ion Battery Anode Materials. Nanomaterials 2020, 10, 2074. https://doi.org/10.3390/nano10102074

AMA Style

Park J, Kim J, Jung DS, Phiri I, Bae H-S, Hong J, Kim S, Lee Y-G, Ryou M-H, Lee K. Microalgae-Templated Spray Drying for Hierarchical and Porous Fe3O4/C Composite Microspheres as Li-ion Battery Anode Materials. Nanomaterials. 2020; 10(10):2074. https://doi.org/10.3390/nano10102074

Chicago/Turabian Style

Park, Jinseok, Jungmin Kim, Dae S. Jung, Isheunesu Phiri, Hyeon-Su Bae, Jinseok Hong, Sojin Kim, Young-Gi Lee, Myung-Hyun Ryou, and Kyubock Lee. 2020. "Microalgae-Templated Spray Drying for Hierarchical and Porous Fe3O4/C Composite Microspheres as Li-ion Battery Anode Materials" Nanomaterials 10, no. 10: 2074. https://doi.org/10.3390/nano10102074

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