Highly Porous NiCoSe4 Microspheres as High-Performance Anode Materials for Sodium-Ion Batteries.,Chemistry - An Asian Journal

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Highly Porous NiCoSe4 Microspheres as High-Performance Anode Materials for Sodium-Ion Batteries.
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2020-03-24 , DOI: 10.1002/asia.202000132
Xiaolian Huang ₁ , Shuang Men ₂ , Hui Zheng ₂ , Dong-Dong Qin ₁ , Xiongwu Kang ₂

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Binary transition metal selenides have been more promising than single transition metal selenides as anode materials for sodium-ion batteries (SIBs). However, the controlled synthesis of transition metal selenides, especially those derived from metal-organic-frameworks with well-controlled structure and morphology is still challenging. In this paper, highly porous NiCoSe4 @NC composite microspheres were synthesized by simultaneous carbonization and selenization of a Ni-Co-based metal-organic framework (NiCo-MOF) and characterized by scanning electron microscopy, transition electron microscopy, X-Ray diffraction, X-Ray photoelectron spectroscopy and electrochemical techniques. The rationally engineered NiCoSe4 @NC composite exhibits a capacity of 325 mAh g-1 at a current density of 1 A g-1 , and 277.8 mAh g-1 at 10 A g-1 . Most importantly, the NiCoSe4 @NC retains a capacity of 293 mAh g-1 at 1 A g-1 after 1500 cycles, with a capacity decay rate of 0.025 % per cycle.

中文翻译：

高度多孔的NiCoSe4微球作为钠离子电池的高性能阳极材料。

作为钠离子电池（SIB）的负极材料，二元过渡金属硒化物比单过渡金属硒化物更有前景。然而，过渡金属硒化物的可控合成，尤其是那些衍生自具有良好控制的结构和形态的金属有机骨架的合成，仍然具有挑战性。本文通过同时碳化和硒化Ni-Co基金属有机骨架（NiCo-MOF）合成了高孔隙度NiCoSe4 @NC复合微球，并通过扫描电子显微镜，过渡电子显微镜，X射线衍射， X射线光电子能谱和电化学技术。合理设计的NiCoSe4 @NC复合材料在1 A g-1的电流密度下显示325 mAh g-1的容量，在10 A g-1时显示277.8 mAh g-1的容量。最重要的是，

更新日期：2020-03-24

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