Clustering Bimetallic M-N-C Catalyst: A Synergistic Approach to Advancing Sulfur Conversion Kinetics for High-Performance Lithium-Sulfur Batteries

被引:22
作者
Wang, Xingbo [1 ]
Zhang, Xiaomin [1 ]
Zhang, Yongguang [2 ]
Wang, Jiayi [3 ]
Liu, Jiabing [4 ]
Li, Shibin [1 ]
Liu, Xin [4 ]
Jin, Mingliang [1 ]
Zhao, Lingzhi [5 ]
Li, Gaoran [6 ]
Wang, Xin [1 ,3 ]
机构
[1] South China Normal Univ, South China Acad Adv Optoelect, Int Acad Optoelect Zhaoqing, Guangzhou 510006, Peoples R China
[2] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
[3] Zhejiang Wanli Univ, Inst Carbon Neutral, Ningbo 315100, Peoples R China
[4] Hebei Univ Technol, Sch Mat Sci & Engn, State Key Lab Reliabil & Intelligence Elect Equipm, Tianjin 300130, Peoples R China
[5] South China Normal Univ, Coll Semicond Sci & Technol, Guangdong Prov Engn Technol Res Ctr Low Carbon & A, Foshan 528225, Peoples R China
[6] Nanjing Univ Sci & Technol, Coll Mat Sci & Engn, Nanjing 210094, Peoples R China
关键词
bimetal; electrocatalysis; Lithium-sulfur batteries; nanoclusters;
D O I
10.1002/aenm.202400926
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
Lithium-sulfur (Li-S) batteries stand out as a promising candidate for future energy storage, characterized by their notable energy density and affordability. However, the impediments raised by polysulfide shuttling and sluggish reaction kinetics pose substantial challenges to the widespread implementation of this technology. Herein, a unique Fe-Co bimetallic single-atom-cluster catalyst (FeCo-SACC) for Li-S batteries are developed. The synergistic integration of single atoms and clusters guarantees not only a commendable specific catalytic activity but also a high metal loading of up to 25 wt%. Meanwhile, the intermetallic interactions regulate the electronic structure, enabling higher sulfur affinity and faster conversion kinetics. The unique 3D-ordered mesoporous (3DOM) carbon architecture further affords conducive sulfur accommodation, efficient active site exposure, and facile ion/mass transfer. As a result, facile and stable sulfur electrochemistry is realized, contributing to excellent cyclability over 1000 cycles and rate capability up to 5 C. Decent cell performances can still be achievable under practical criteria, e.g., high sulfur loading of 15 mg cm-2, lean electrolyte of 4.6 mu L mg-1, and 1.91-Ah pouch configuration. This work establishes a novel paradigm for the development of advanced sulfur electrocatalysts and high-performance Li-S batteries. A unique Fe-Co bimetallic single-atom-cluster catalyst (FeCo-SACC) for Li-S batteries is prepared. The synergistic integration of single atoms and clusters guarantees a commendable specific catalytic activity. Meanwhile, the intermetallic interactions regulate the electronic structure, enabling higher sulfur affinity and faster conversion kinetics. Therefore, decent cell performances can be achievable. image
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页数:12
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