A General Metal‐Organic Framework (MOF)‐Derived Selenidation Strategy for In Situ Carbon‐Encapsulated Metal Selenides as High‐Rate Anodes for Na‐Ion Batteries |
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Authors: | Xijun Xu Jun Liu Jiangwen Liu Liuzhang Ouyang Renzong Hu Hui Wang Lichun Yang Min Zhu |
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Affiliation: | 1. Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, P. R. China;2. SUNWODA‐SCUT Joint Laboratory for Advanced Energy Storage Technology, South China University of Technology, Guangzhou, P. R. China |
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Abstract: | On account of increasing demand for energy storage devices, sodium‐ion batteries (SIBs) with abundant reserve, low cost, and similar electrochemical properties have the potential to partly replace the commercial lithium‐ion batteries. In this study, a facile metal‐organic framework (MOF)‐derived selenidation strategy to synthesize in situ carbon‐encapsulated selenides as superior anode for SIBs is rationally designed. These selenides with particular micro‐ and nanostructured features deliver ultrastable cycling performance at high charge–discharge rate and demonstrate ultraexcellent rate capability. For example, the uniform peapod‐like Fe7Se8@C nanorods represent a high specific capacity of 218 mAh g?1 after 500 cycles at 3 A g?1 and the porous NiSe@C spheres display a high specific capacity of 160 mAh g?1 after 2000 cycles at 3 A g?1. The current simple MOF‐derived method could be a promising strategy for boosting the development of new functional inorganic materials for energy storage, catalysis, and sensors. |
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Keywords: | carbon‐encapsulation metal selenides MOF templates Na‐ion batteries rate capability |
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