One-Step Solvothermal Route to Sn4P3-Reduced Graphene Oxide Nanohybrids as Cycle-Stable Anode Materials for Sodium-Ion Batteries.
One-Step Solvothermal Route to Sn4P3-Reduced Graphene Oxide Nanohybrids as Cycle-Stable Anode Materials for Sodium-Ion Batteries.
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DOI：
10.1021/acsami.0c23052
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发表时间：
2021-03
影响因子：
9.5
通讯作者：
Weili Liu;Xianxia Yuan;Xuebin Yu
中科院分区：
文献类型：
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作者：
Weili Liu;Xianxia Yuan;Xuebin Yu
Sn_4P_3具有较高的理论容量、良好的导电性和相对合适的电位平台，被认为是钠离子电池的理想负极材料。然而，目前Sn 4P 3基纳米杂化物的合成路线通常涉及基于外来模板的多步程序，限制了它们在NIB中的大规模生产和应用。本文报道了一种简单易行的溶剂热方法，以商业化的赤磷（CRP）为磷源，无毒的乙醇胺为溶剂，一步合成了Sn 4P 3-还原氧化石墨烯（Sn 4P 3-rGO）杂化材料。得益于新的策略和精心设计，超小的Sn 4P 3纳米颗粒（平均2.7 nm）均匀地锚定在rGO上。rGO网络的高导电性和超小Sn 4P 3纳米颗粒的短电子/离子扩散路径赋予Sn 4P 3-rGO混合物高容量和稳定的长期循环能力。具体地，优化的Sn 4P 3-rGO杂化物显示出在200 mA g-1的电流密度下663.5mA h g-1的显著可逆容量、超长的循环寿命（在2000 mA g-1的高电流密度下2500次循环后301 mA h g-1）和优异的倍率性能，将其本身呈现为非常有前途的用于NIB的阳极材料。
Sn4P3, owing to its high theoretical volumetric capacity, good electrical conductivity, and relatively appropriate potential plateau, has been recognized as an ideal anode for sodium-ion batteries (NIBs). However, the current synthetic routes for Sn4P3-based nanohybrids typically involve foreign-template-based multistep procedures, limiting their large-scale production and applications in NIBs. Using commercial red phosphorus (CRP) as the phosphorus source and nontoxic ethanolamine as the solvent, we herein report a facile and scalable solvothermal protocol for the one-step preparation of Sn4P3-reduced oxide graphene (denoted as Sn4P3-rGO) hybrid materials. Benefiting from the novel strategy and elaborate design, ultrasmall Sn4P3 nanoparticles (2.7 nm on average) are homogeneously anchored onto rGO. The high conductivity of the rGO network and the short electron/ion diffusion path of ultrasmall Sn4P3 nanoparticles give the Sn4P3-rGO hybrid high capacities and stable long-term cyclability. Specifically, the optimized Sn4P3-rGO hybrid displays a remarkable reversible capacity of 663.5 mA h g-1 at a current density of 200 mA g-1, ultralong-term cycle life (301 mA h g-1 after 2500 cycles at a high current density of 2000 mA g-1), and excellent rate capability, presenting itself as a highly promising anode material for NIBs.