Three-dimensional porous carbon doped with N, O and P heteroatoms as high-performance anode materials for sodium ion batteries
Three-dimensional porous carbon doped with N, O and P heteroatoms as high-performance anode materials for sodium ion batteries
复制标题
掺杂N、O、P杂原子的三维多孔碳作为高性能钠离子电池负极材料
DOI：
10.1016/j.cej.2019.122457
复制
发表时间：
2020
影响因子：
15.1
通讯作者：
Huaihe Song
中科院分区：
文献类型：
--
作者：
Chunli Zhou;Dengke Wang;Ang Li;Erzhuang Pan;Haiyan Liu;Xiaohong Chen;Mengqiu Jia;Huaihe Song
多孔碳（PC）材料是高性能钠离子电池（SIB）阳极的绝佳替代品。然而，大多数PC材料都是通过复杂且多步骤的模板方法制备的，这限制了大规模生产。在此，我们提出了一种简单且可重复的煅烧方法，以聚对苯二胺水凝胶作为前体合成三维多孔碳（3D-PC）材料。 N、O和P杂原子被成功引入3D-PC中以提供更多的钠储存位点。获得的3D-PC在50mAg−1时具有332mAhg−1的高钠存储容量，并且在10Ag−1时可逆容量仍保留139mAhg−1。此外，3D-PC还表现出超长的循环寿命，即使在0.5Ag-1和5Ag-1的高电流密度下，1000次循环后容量也分别达到212mAhg−1和120mAhg−1的稳定容量。这些结果表明，3D-PC电极表现出良好的倍率性能和优异的循环稳定性，根据定量分析，这归因于表面主导的钠存储机制。该方法成本低廉，可有效制备高性能SIB多孔碳负极。
Porous carbon (PC) materials are the excellent alternative to anodes of high performance sodium ion batteries (SIBs). However, most PC materials are prepared with complicated and multi-step template method, which limits the mass production. Herein, we present a simple and repeatable calcination approach to synthesize three-dimensional porous carbon (3D-PC) materials using poly(p-phenylenediamine) hydrogel as precursor. N, O and P heteroatoms are successfully introduced into 3D-PC to provide more sodium storage sites. The obtained 3D-PC delivers high sodium storage capacity of 332 mAh g−1at 50 mA g−1and the reversible capacity still retains 139 mAh g−1at 10 A g−1. Moreover, 3D-PC also shows ultralong cycling life, the stable capacities of 212 mAh g−1and 120 mAh g−1after 1000 cycles even at the high current density of 0.5 A g−1and 5 A g−1, respectively. These results illustrate that 3D-PC electrode displays great rate capability and excellent cycling stability, which would be ascribed to surface-dominated sodium storage mechanism according to quantitative analysis. This method is low cost and effective for preparing high-performance porous carbon anodes for SIBs.