Space-Confined Yolk-Shell Construction of Fe3O4Nanoparticles Inside N-Doped Hollow Mesoporous Carbon Spheres as Bifunctional Electrocatalysts for Long-Term Rechargeable Zinc-Air Batteries

被引：156
作者：
Wang, Bin [1 ]
Ye, Yuzhen [1 ]
Xu, Li [1 ]
Quan, Yu [1 ]
Wei, Wenxian [2 ]
Zhu, Wenshuai [1 ]
Li, Huaming [1 ]
Xia, Jiexiang [1 ]
机构：
[1] Jiangsu Univ, Inst Energy Res, Sch Chem & Chem Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Yangzhou Univ, Testing Ctr, Yangzhou 225009, Jiangsu, Peoples R China
来源：
ADVANCED FUNCTIONAL MATERIALS | 2020年 / 30卷 / 51期
基金：
中国国家自然科学基金;
关键词：
carbon spheres; Fe(3)O(4)nanoparticles; space-confined; yolk-shell constructions; zinc-air batteries; OXYGEN REDUCTION REACTION; METAL-ORGANIC-FRAMEWORK; POROUS CARBON; RATIONAL DESIGN; IONIC LIQUID; NANOPARTICLES; CATALYSTS; IRON; FE3O4; PERSPECTIVES;
D O I：
10.1002/adfm.202005834
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Development of efficient, durable and inexpensive oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalysts with accelerated kinetics and high-performance remain a grand challenge in the context of reversible metal-air batteries. Herein, the Fe(3)O(4)nanoparticles inside N-doped hollow mesoporous carbon spheres (N/HCSs) yolk-shell structure (Fe-x@N/HCSs) is constructed as an excellent bifunctional electrocatalyst for ORR and OER via an innovative approach. The N/HCSs effectively control and confine in situ growth of Fe(3)O(4)nanoparticles using the melting-diffusion strategy via capillary force and significantly improve the conductivity and structural stability of the hybrid material. The constructed yolk-shell structured Fe-20@N/HCSs ecosystem with Fe-N(x)active sites exhibits excellent ORR and OER activity and stability, which even surpass commercial grade Pt/C, RuO2, IrO(2)and many reported catalysts. Moreover, the zinc-air battery assembled with Fe-20@N/HCSs as a cathode achieves high open circuit voltage (1.57 V), large power density (140.8 mW cm(-2)), and excellent long-term cycling performance (over 300h), revealing superior performance compared to commercial Pt/C + RuO2. This work provides a new avenue for the design and optimization of other high-performance yolk-shell materials with nanoscale confinement structures.
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页数：8
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