Highly Porous NiCoSe4 Microspheres as High-Performance Anode Materials for Sodium-Ion Batteries

作者：Huang, Xiaolian; Men, Shuang; Zheng, Hui; Qin, Dong-Dong^*; Kang, Xiongwu^*

来源：Chemistry - An Asian Journal, 2020, 15(9): 1456-1463.

DOI：10.1002/asia.202000132

• Energy conversion
• intercalation
• NiCoSe4
• metal-organic frameworks
• sodium-ion batteries

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.

• 单位
  广州大学