Edge-distributed iron single-atom moiety with efficient "trapping-conversion" for polysulfides driving high-performance of Li-S battery

被引：23

作者：

Zhang, Fanchao ^{[1
]}

Tang, Zihuan ^{[2
]}

Zheng, Lirong ^{[3
]}

Zhang, Tengfei ^{[1
]}

Xu, Mengyuan ^{[1
]}

Xiao, Hong ^{[1
]}

Zhuang, Huifeng ^{[1
]}

Han, Pinyu ^{[1
]}

Gao, Qiuming ^{[1
]}

机构：

[1] Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Sch Chem, Key Lab Bioinspired Smart Interfacial Sci & Techno, Beijing 100191, Peoples R China

[2] Wuhan Univ Sci & Technol, Inst Adv Mat & Nanotechnol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China

[3] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2023年 / 334卷

基金：

美国国家科学基金会;

关键词：

Single-atom sites; Edge-distributed; Li-S battery; Shuttle effect; Trapping-conversion;

D O I：

10.1016/j.apcatb.2023.122876

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

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.

引用

页数：11

共 42 条

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[42] Dual-Atom Nickel Moieties of Ni(II)2N4(μ2-N)2 Anchored on Alfalfa-Derived Developed Porous N-Doped Carbon for High-Performance Li-S Battery
Zhang, Tengfei
Xiao, Hong
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Zhang, Fanchao
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Gao, Qiuming
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