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Nano Research

Article Title

Iron sulfides with dopamine-derived carbon coating as superior performance anodes for sodium-ion batteries

Authors

Aihua Jin, Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
Seung-Ho Yu, Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
Jae-Hyuk Park, Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
Seok Mun Kang, Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
Mi-Ju Kim, Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
Tae-Yeol Jeon, Beamline Department, Pohang Accelerator Laboratory (PAL), Pohang 37673, Republic of Korea
Junyoung Mun, Department of Energy and Chemical Engineering, Incheon National University, 12-1, Songdo-dong, Yeonsu-gu, Incheon 22012, Republic of Korea§ Aihua Jin and Seung-Ho Yu contributed equally to this work.
Yung-Eun Sung, Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea

Keywords

sodium-ion batteries, iron sulfides, high energy ball-milling, dopamine, X-ray absorption near edge structure

Abstract

High energy ball-milled iron sulfides with thin carbon layer coating (BM-FeS/C composites) were prepared by the simple and economical process. Ball-milled process, followed by carbon coating, reduced the particle size and increased the electrical conductivity. When employed as sodium-ion battery anodes, BM-FeS/C composites showed extremely high electrochemical performance with reversible specific capacity of 589.8 mAh·g−1 after 100 cycles at a current density of 100 mA·g−1. They also exhibited superior rate capabilities of 375.9 mAh·g−1 even at 3.2 A·g−1 and 423.6 mAh·g−1 at 1.5 A·g−1. X-ray absorption near edge structure analysis confirmed the electrochemical pathway for conversion reaction of BM-FeS/C composites.

Graphical Abstract

Publisher

Tsinghua University Press

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