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Mg-doped layered oxide cathode for Na-ion batteries |
Yuejun Ding(丁月君)1,2, Feixiang Ding(丁飞翔)1, Xiaohui Rong(容晓晖)1,†, Yaxiang Lu(陆雅翔)1, and Yong-Sheng Hu(胡勇胜)1,2,‡ |
1 Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; 2 Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences, Beijing 100190, China |
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Abstract Na-ion batteries (NIBs) are regarding as the optimum complement for Li-ion batteries along with the rapid development of stationary energy storage systems. In order to meet the commercial demands of cathodes for NIBs, O3-type Cu containing layered oxide Na0.90Cu0.22Fe0.30Mn0.48O2 with good comprehensive performance and low-cost element components is very promising for the practical use. However, only part of the Cu3+/Cu2+ redox couple participated in the redox reaction, thus impairing the specific capacity of the cathode materials. Herein, Mg2+-doped O3-Na0.90Mg0.08Cu0.22Fe0.30Mn0.40O2 layered oxide without Mn3+ was synthesized successfully, which exhibited improved reversible specific capacity of 118 mAh/g in the voltage range of 2.4-4.0 V at 0.2 C, corresponding to the intercalation/deintercalation of 0.47 Na+ (0.1 more than that of Na0.90Cu0.22Fe0.30Mn0.48O2). This work demonstrates an important strategy to obtain advanced layered oxide cathodes for NIBs.
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Received: 26 November 2021
Revised: 01 December 2021
Accepted manuscript online: 07 February 2022
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PACS:
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82.47.-a
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(Applied electrochemistry)
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82.45.Fk
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(Electrodes)
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84.60.-h
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(Direct energy conversion and storage)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51725206, 52122214, and 52072403), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA21070500), Youth Innovation Promotion Association of the Chinese Academy of Sciences (Grant No. 2020006), and Beijing Municipal Natural Science Foundation, China (Grant No. 2212022). |
Corresponding Authors:
Xiaohui Rong, Yong-Sheng Hu
E-mail: rong@iphy.ac.cn;yshu@iphy.ac.cn
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Cite this article:
Yuejun Ding(丁月君), Feixiang Ding(丁飞翔), Xiaohui Rong(容晓晖), Yaxiang Lu(陆雅翔), and Yong-Sheng Hu(胡勇胜) Mg-doped layered oxide cathode for Na-ion batteries 2022 Chin. Phys. B 31 068201
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