Abbasi, A, Mirhabibi, A, Arabi, H et al. (2 more authors) (2016) Synthesis, characterization and electrochemical performances of γ-Fe₂O₃ cathode material for Li-ion batteries. Journal of Materials Science: Materials in Electronics, 27 (8). pp. 7953-7961. ISSN 0957-4522
Abstract
Maghemite nanoparticles were successfully synthesized via a co-precipitation method and electrochemical-optical properties of three different sizes were studied. Using this material as a Li-ion battery cathode, the results of charge–discharge tests showed that decreasing the maghemite particle size increased the lithium hosting capacity. First discharge capacities for cathodes made of material of particle size 11 and 19 nm were 206 and 186 mAh g−1 respectively, while for micron-sized cathode material a discharge capacity of 26 mAh g−1 was obtained. Electrochemical impedance spectroscopy (EIS) was used to derive equivalent circuit elements, which confirmed a reduction in lithium insertion resistance for material with a smaller particle size. EIS investigations disclosed that the Rct and ZW reduced with reduction of particle size, which indicates cathode material with lower particle size is more suitable. Band-gaps of the materials were determined using the diffuse reflectance spectroscopy technique on the base of Kubelka–Munk theory. The results showed that the needed energy for electron conduction reduces with reduction of particle size, which results in capacity enhancement.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Institute for Materials Research (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 May 2016 10:04 |
Last Modified: | 23 Jun 2023 22:05 |
Published Version: | http://dx.doi.org/10.1007/s10854-016-4788-7 |
Status: | Published |
Publisher: | Springer Verlag |
Identification Number: | 10.1007/s10854-016-4788-7 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:99601 |