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A General Metal‐Organic Framework (MOF)‐Derived Selenidation Strategy for In Situ Carbon‐Encapsulated Metal Selenides as High‐Rate Anodes for Na‐Ion Batteries
Author(s) -
Xu Xijun,
Liu Jun,
Liu Jiangwen,
Ouyang Liuzhang,
Hu Renzong,
Wang Hui,
Yang Lichun,
Zhu Min
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201707573
Subject(s) - materials science , anode , metal organic framework , electrochemistry , energy storage , nanorod , nanotechnology , carbon fibers , lithium (medication) , chemical engineering , porosity , electrode , composite material , composite number , adsorption , organic chemistry , chemistry , engineering , medicine , power (physics) , physics , quantum mechanics , endocrinology
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 Fe 7 Se 8 @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.