Low-Temperature Solution-Based Phosphorization Reaction Route to Sn4P3/Reduced Graphene Oxide Nanohybrids as Anodes for Sodium Ion Batteries

详细信息    查看全文

• 作者：Qun Li ; Zhaoqiang Li ; Zhiwei Zhang ; Caixia Li ; Jingyun Ma ; Chengxiang Wang ; Xiaoli Ge ; Shihua Dong and Longwei Yin
• 刊名：Advanced Energy Materials
• 出版年：2016
• 出版时间：August 10, 2016
• 年：2016
• 卷：6
• 期：15
• 全文大小：2299K
• ISSN：1614-6840

文摘

Different from previously reported mechanical alloying route to synthesize Sn _x P₃, novel Sn₄P₃/reduced graphene oxide (RGO) hybrids are synthesized for the first time through an in situ low-temperature solution-based phosphorization reaction route from Sn/RGO. Sn₄P₃ nanoparticles combining with advantages of high conductivity of Sn and high capacity of P are homogenously loaded on the RGO nanosheets, interconnecting to form 3D mesoporous architecture nanostructures. The Sn₄P₃/RGO hybrid architecture materials exhibit significantly improved electrochemical performance of high reversible capacity, high-rate capability, and excellent cycling performance as sodium ion batteries (SIBs) anode materials, showing an excellent reversible capacity of 656 mA h g⁻¹ at a current density of 100 mA g⁻¹ over 100 cycles, demonstrating a greatly enhanced rate capability of a reversible capacity of 391 mA h g⁻¹ even at a high current density of 2.0 A g⁻¹. Moreover, Sn₄P₃/RGO SIBs anodes exhibit a superior long cycling life, delivering a high capacity of 362 mA h g⁻¹ after 1500 cycles at a high current density of 1.0 A g⁻¹. The outstanding cycling performance and rate capability of these porous hierarchical Sn₄P₃/RGO hybrid anodes can be attributed to the advantage of porous structure, and the synergistic effect between Sn₄P₃ nanoparticles and RGO nanosheets.