材料科学
阳极
金属有机骨架
储能
纳米棒
纳米技术
碳纤维
锂(药物)
化学工程
多孔性
电极
电化学
复合材料
复合数
吸附
有机化学
工程类
内分泌学
物理
物理化学
功率(物理)
医学
化学
量子力学
作者
Xijun Xu,Jun Liu,Jiangwen Liu,Liuzhang Ouyang,Renzong Hu,Hui Wang,Lichun Yang,Min Zhu
标识
DOI:10.1002/adfm.201707573
摘要
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 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.
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