阳极
杂原子
材料科学
碳纤维
背景(考古学)
碳化
纳米技术
化学工程
硼
兴奋剂
钠
复合材料
化学
电极
冶金
光电子学
有机化学
物理化学
扫描电子显微镜
复合数
戒指(化学)
古生物学
工程类
生物
作者
Najid Ahmad,Nisar Muhammad,Hong Chen,Wang Ji,Chaohui Wei,Muhammad Abdullah Khan,Ruizhi Yang
标识
DOI:10.1016/j.jcis.2023.07.082
摘要
Developing improved anode materials is critical to the performance enhancement and the lifespan prolonging of sodium-ion batteries (SIBs). In this context, carbon-based nanostructures have emerged as a promising candidate. In this work, we have synthesized N, B, and P tri-doped carbon (NBPC) spheres using a one-step carbonization method. The as-prepared NBPC exhibits exceptional properties, including an expanded layer space, sufficient structural defects, and enhanced electrical conductivity. These characteristics synergistically contribute to the remarkable rate capability and ultra-long lifespan when NBPC is employed as an anode material for SIBs. The as-prepared NBPC demonstrates a reversible capacity of 290.6 mAh/g at 0.05 A/g, with a capacity retention of 98.4% after 800 cycles. Furthermore, NBPC exhibits an impressively ultra-long cycle life of 2400 cycles at 1.0 A/g with a reversible capacity of 140.2 mAh/g. First principle calculations confirm that the introduction of N, B, and P heteroatoms in carbon enhances the binding strength of sodium ions within NBPC. This work presents a novel approach for fabricating advanced anode materials, enabling the development of long-life SIBs for practical applications.
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