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Two-Dimensional Hierarchical Fe–N–C Electrocatalyst for Zn-Air Batteries with Ultrahigh Specific Capacity
ACS Materials Letters ( IF 9.6 ) Pub Date : 2019-11-22 , DOI: 10.1021/acsmaterialslett.9b00386 Ruilin Yuan 1 , Wentuan Bi 1 , Tianpei Zhou 1 , Nan Zhang 2 , Cheng’an Zhong 1 , Wangsheng Chu 2 , Wensheng Yan 2 , Qian Xu 2 , Changzheng Wu 1 , Yi Xie 1
ACS Materials Letters ( IF 9.6 ) Pub Date : 2019-11-22 , DOI: 10.1021/acsmaterialslett.9b00386 Ruilin Yuan 1 , Wentuan Bi 1 , Tianpei Zhou 1 , Nan Zhang 2 , Cheng’an Zhong 1 , Wangsheng Chu 2 , Wensheng Yan 2 , Qian Xu 2 , Changzheng Wu 1 , Yi Xie 1
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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 gZn–1 (close to theoretical value of 820 mAh gZn–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 the performance of metal-air battery.
中文翻译：
超高比容量锌空气电池的二维分层Fe–N–C电催化剂
迫切需要提高锌空气电池的性能，这需要合理设计具有高效质量和电荷转移能力的电催化剂。在这项研究中，二维（2D）分层Fe–N–C材料被开发为高活性氧还原反应（ORR）催化剂。得益于增强的介孔性和较高的两个数量级的电导率，所获得的催化剂统一了有效的传质和加速了电荷转移。因此，与该催化剂集成的锌空气电池可实现798 mAh g Zn –1的超高比容量（接近于820 mAh g Zn –1的理论值））和超过130小时的出色耐久性。我们的工作为工程设计三相边界的传递能力以提高金属空气电池的性能开辟了一条新途径。
更新日期：2019-11-28
中文翻译：
超高比容量锌空气电池的二维分层Fe–N–C电催化剂
迫切需要提高锌空气电池的性能，这需要合理设计具有高效质量和电荷转移能力的电催化剂。在这项研究中，二维（2D）分层Fe–N–C材料被开发为高活性氧还原反应（ORR）催化剂。得益于增强的介孔性和较高的两个数量级的电导率，所获得的催化剂统一了有效的传质和加速了电荷转移。因此，与该催化剂集成的锌空气电池可实现798 mAh g Zn –1的超高比容量（接近于820 mAh g Zn –1的理论值））和超过130小时的出色耐久性。我们的工作为工程设计三相边界的传递能力以提高金属空气电池的性能开辟了一条新途径。
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