Pseudocapacitive behavior of the Fe2O3 anode and its contribution to high reversible capacity in lithium ion batteries
Article
Xiang, Yimo, Yang, Zhigao, Wang, Shengping, Hossain, Md. Shahriar A., Yu, Jingxian, Kumar, Nanjundan Ashok and Yamauchi, Yusuke. 2018. "Pseudocapacitive behavior of the Fe2O3 anode and its contribution to high reversible capacity in lithium ion batteries." Nanoscale. 10 (37), pp. 18010-18018. https://doi.org/10.1039/c8nr04871a
Article Title | Pseudocapacitive behavior of the Fe2O3 anode and its contribution to high reversible capacity in lithium ion batteries |
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ERA Journal ID | 41997 |
Article Category | Article |
Authors | Xiang, Yimo, Yang, Zhigao, Wang, Shengping, Hossain, Md. Shahriar A., Yu, Jingxian, Kumar, Nanjundan Ashok and Yamauchi, Yusuke |
Journal Title | Nanoscale |
Journal Citation | 10 (37), pp. 18010-18018 |
Number of Pages | 9 |
Year | 2018 |
Publisher | The Royal Society of Chemistry |
Place of Publication | United Kingdom |
ISSN | 2040-3364 |
2040-3372 | |
Digital Object Identifier (DOI) | https://doi.org/10.1039/c8nr04871a |
Web Address (URL) | https://pubs.rsc.org/en/content/articlelanding/2018/NR/C8NR04871A |
Abstract | Pseudocapacitance, which is the storage of charge based on continuous and fast reversible redox reactions at the surface of electrode materials, is commonly observed for electrodes in lithium ion batteries, especially for transition metal oxide anodes. In this report, bare Fe2O3 of granular morphology (∼30 nm in diameter) with high purity and decent crystallinity as well as recommendable electrochemical performances is fabricated hydrothermally and employed as the subject to clarify pseudocapacitive behavior in transition metal oxide anodes. Electrochemical technologies such as galvanostatic charging/discharging, differential capacity analysis (dQ/dV) and the power law relationship (i = aνb), which can distinguish pseudocapacitive behaviors of an electrode reaction were employed to analyze the electrodes. Reversible capacities of ∼120 mA h g−1 (0.117 F cm−2) for Fe2O3 were found within particular electrochemical windows (2.3–3.0 V, 0.3–0.8 V for discharging and 2.2–3.0 V, 0.3–1.3 V for charging). A new direction of optimizing the capacities, rate and cycling performances for lithium ion batteries is pointed out with connections between the pseudocapacitive behavior and morphologies of surfaces as well as structures of the electrodes. |
Keywords | Anodes; lithium ion batteries |
ANZSRC Field of Research 2020 | 400404. Electrochemical energy storage and conversion |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | China University of Geosciences, China |
Qingdao University of Science and Technology, China | |
University of Queensland | |
University of Adelaide | |
Kyung Hee University, Korea | |
National Institute for Materials Science, Japan |
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