Nanopore Confinement of Electrocatalysts Optimizing Triple Transport for an Ultrahigh-Power-Density Zinc-Air Fuel Cell with Robust Stability

被引：142

作者：

Zhou, Tianpei ^{[1
]}

Shan, Huan ^{[1
]}

Yu, Hao ^{[2
]}

Zhong, Cheng'an ^{[1
]}

Ge, Jiankai ^{[1
]}

Zhang, Nan ^{[3
]}

Chu, Wangsheng ^{[3
]}

Yan, Wensheng ^{[3
]}

Xu, Qian ^{[3
]}

Wu, Heng'an ^{[2
]}

Wu, Changzheng ^{[1
,4
]}

Xie, Yi ^{[1
,4
]}

机构：

[1] Univ Sci & Technol China, CAS Ctr Excellence Nanosci, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, CAS Ctr Excellence Complex Syst Mech, Hefei 230027, Peoples R China

[3] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China

[4] Hefei Comprehens Natl Sci Ctr, Inst Energy, Hefei 230031, Peoples R China

来源：

ADVANCED MATERIALS | 2020年 / 32卷 / 47期

关键词：

nanopore confinement; oxygen reduction reaction; triple-phase interphases; zinc-air fuel cell; OXYGEN REDUCTION; POROUS CARBON; EFFICIENT;

D O I：

10.1002/adma.202003251

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Metal-air fuel cells with high energy density, eco-friendliness, and low cost bring significantly high security to future power systems. However, the impending challenges of low power density and high-current-density stability limit their widespread applications. In this study, an ultrahigh-power-density Zn-air fuel cell with robust stability is highlighted. Benefiting from the water-resistance effect of the confined nanopores, the highly active cobalt cluster electrocatalysts reside in specific nanopores and possess stable triple-phase reaction areas, leading to the synergistic optimization of electron conduction, oxygen gas diffusion, and ion transport for electrocatalysis. As a result, the as-established Zn-air fuel cell shows the best stability under high-current-density discharging (>90 h at 100 mA cm(-2)) and superior power density (peak power density: >300 mW cm(-2), specific power: 500 Wg(cat)(-1)) compared to most reported non-noble-metal electrocatalysts. The findings will provide new insights in the rational design of electrocatalysts for advanced metal-air fuel cell systems.

引用

页数：8

共 37 条

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