1. Constructing Three-Dimensional Porous Carbon Framework Embedded with FeSe2 Nanoparticles as an Anode Material for Rechargeable Batteries
- Author
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Jie Xu, Haiguang Zhao, Xia Wang, Yinliang Tang, Haifei Zhao, Xueying Li, Guoxia Zhao, Hongliang Li, Qiang Li, Hongsen Li, Hong Wang, and Shandong Li
- Subjects
Materials science ,Composite number ,Nanoparticle ,chemistry.chemical_element ,02 engineering and technology ,Conductivity ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Anode ,chemistry ,Chemical engineering ,General Materials Science ,0210 nano-technology ,Porosity ,Carbon ,Current density - Abstract
Metal selenides have caused widespread concern due to their high theoretical capacities and appropriate working potential; however, they suffer from large volume variation during cycling and low electrical conductivity, which limit their practical applications. In this article, a three-dimensional (3D) porous carbon framework embedded with homogeneous FeSe2 nanoparticles (3D porous FeSe2/C composite) was synthesized by a facile calcined approach, following a selenized method without a template. As the uniformity of FeSe2 nanoparticles and 3D porous structure are beneficial to accommodate volume stress upon cycling and shorten electrons/ions transport path, associated with carbon as a buffer matrix for increasing conductivity, the 3D porous FeSe2/C composite displays excellent electrochemical properties with high reversible capacities of 798.4 and 455.0 mA h g–1 for lithium-ion batteries and sodium-ion batteries, respectively, when the current density is 100 mA g–1 after 100 cycles. In addition, the as-pre...
- Published
- 2018