部分
俘获
电池(电)
GSM演进的增强数据速率
硫黄
化学
氧化还原
兴奋剂
离子
Atom(片上系统)
化学工程
材料科学
纳米技术
计算机科学
立体化学
无机化学
光电子学
物理
有机化学
电信
生物
嵌入式系统
生态学
功率(物理)
工程类
量子力学
作者
Fanchao Zhang,Zihuan Tang,Lirong Zheng,Tengfei Zhang,Maowen Xu,H. Xiao,Huifeng Zhuang,Pinyu Han,Qiuming Gao
标识
DOI:10.1016/j.apcatb.2023.122876
摘要
Great efforts are exploring single-atom (SA) sites for tailoring catalytic effects on the sulfur-related redox reaction in Li-S battery, while edge-distributed SA sites lack attention. Herein, we implanted SA iron sites in N-doped porous carbon on CNTs (Fe-NPC@CNTs) to obtain edge-distributed FeN4 moieties via a polymer inductive strategy. The Fe-NPC@CNTs own enhanced “trapping-conversion” ability for polysulfides. The Li-S battery based on Fe-NPC@CNTs achieves a wonderful capacity of 1004 mAh g−1 at 1 C with long-term cycling stability, where the capacity fading rate is 0.032% per cycle over 1200 cycles. Noteworthy, the cell delivers very large capacities of 3.94/6.12 mAh cm−2 under high sulfur loadings of 4.50/5.04 mg cm−2 at 0.5/0.2 C, corresponding to 82.5/82.4% capacity retentions over 100 cycles. Under ultrahigh sulfur loadings (7.8/10.9 mg cm−2), the cell exhibits amazing large areal capacities of 7.63/10.76 mAh cm−2. The edge-distributed SA sites engineering provides a bright blueprint for advanced Li-S battery.
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