Two-Dimensional Hierarchical Fe-N-C Electrocatalyst for Zn-Air Batteries with Ultrahigh Specific Capacity

被引：42
|
作者：
Yuan, Ruilin [1 ,2 ]
Bi, Wentuan [1 ,2 ]
Zhou, Tianpei [1 ,2 ]
Zhang, Nan [3 ]
Zhong, Cheng'an [1 ,2 ]
Chu, Wangsheng [3 ]
Yan, Wensheng [3 ]
Xu, Qian [3 ]
Wu, Changzheng [1 ,2 ]
Xie, Yi [1 ,2 ]
机构：
[1] Univ Sci & Technol China, iChEM Collaborat Innovat Ctr Chem Energy Mat, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
[2] Univ Sci & Technol China, CAS Key Lab Mech Behav & Design Mat, Hefei 230026, Anhui, Peoples R China
[3] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China
来源：
ACS MATERIALS LETTERS | 2020年 / 2卷 / 01期
关键词：
NITROGEN-DOPED CARBON; OXYGEN REDUCTION; EFFICIENT ELECTROCATALYST; ACTIVE-SITES; POROUS CARBON; FUEL-CELLS; PERFORMANCE; CATALYSTS; DESIGN; IRON;
D O I：
10.1021/acsmaterialslett.9b00386
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Promoting the performance of Zn-air batteries urgently requires rational design of electrocatalysts with highly efficient mass and charge transfer capacity. In this study, two-dimensional (2D) hierarchical Fe-N-C materials were developed as highly active oxygen reduction reaction (ORR) catalysts. Benefiting from the enhanced mesoporosity and two orders of magnitude higher electrical conductivity, the as-obtained catalysts unify efficient mass transport and expedite charge transfer. Therefore, Zn-air battery integrated with this catalyst achieves an ultrahigh specific capacity of 798 mAh g(zn)(-1) (close to theoretical value of 820 mAh g(zn)(-1)) and excellent durability for over 130 h. Our work paves a new way to engineer the transfer capacity of triple-phase boundary to boost metal-air battery. the performance of metal-air battery.
引用
收藏
页码：35 / +
页数：13
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