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Bifunctional oxygen electrodes of homogeneous Co4N nanocrystals@N-doped carbon hybrids for rechargeable Zn-air batteries
Carbon ( IF 10.5 ) Pub Date : 2019-10-01 , DOI: 10.1016/j.carbon.2019.05.063
Lulu Chen , Yelong Zhang , Xiangjian Liu , Ling Long , Siyu Wang , Xiaolong Xu , Minchao Liu , Wenxiu Yang , Jianbo Jia
Carbon ( IF 10.5 ) Pub Date : 2019-10-01 , DOI: 10.1016/j.carbon.2019.05.063
Lulu Chen , Yelong Zhang , Xiangjian Liu , Ling Long , Siyu Wang , Xiaolong Xu , Minchao Liu , Wenxiu Yang , Jianbo Jia
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Abstract The development of transition metal nitrides/carbon hybrids with well-organized morphology, outstanding efficiency and durability for Zn-air batteries are of great urgency. Herein, a morphology-controlled strategy to efficiently fabricate uniform Co4N nanoparticles anchored on N-doped carbon (Co4N@NC-m) is reported. The diameters and distribution of Co4N nanocrystals can be tuned to be homogeneous profited by abundant N sources in melamine. Moreover, thanks to the advantages of higher nitrogen doping content, better electrical conductivity, higher degree of graphitization, and larger electrochemical surface area, Co4N@NC-m possesses excellent oxygen reduction reaction (half-wave potential of 0.87 V) and oxygen evolution reaction (overpotential of 398 mV at 10 mA cm−2) activities in basic solution. The Zn-air battery fabricated with Co4N@NC-m owns higher open circuit voltage (1.490 V), larger power density, and better rechargeability than those of the commercial IrO2 + 20% Pt/C catalysts, which proves the potential application in practical energy conversion devices.
中文翻译:
用于可充电锌空气电池的均质 Co4N 纳米晶@N 掺杂碳杂化物的双功能氧电极
摘要 开发具有良好组织形态、出色效率和耐用性的过渡金属氮化物/碳杂化物用于锌-空气电池已迫在眉睫。本文报道了一种形态控制策略,可有效制造锚定在 N 掺杂碳上的均匀 Co4N 纳米粒子(Co4N@NC-m)。通过三聚氰胺中丰富的氮源,可以调整 Co4N 纳米晶体的直径和分布使其均匀。此外,由于具有更高的氮掺杂含量、更好的导电性、更高的石墨化程度和更大的电化学表面积等优点,Co4N@NC-m 具有优异的氧还原反应(半波电位为 0.87 V)和析氧反应(10 mA cm−2 时 398 mV 的过电位)在碱性溶液中的活性。
更新日期:2019-10-01
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
用于可充电锌空气电池的均质 Co4N 纳米晶@N 掺杂碳杂化物的双功能氧电极
摘要 开发具有良好组织形态、出色效率和耐用性的过渡金属氮化物/碳杂化物用于锌-空气电池已迫在眉睫。本文报道了一种形态控制策略,可有效制造锚定在 N 掺杂碳上的均匀 Co4N 纳米粒子(Co4N@NC-m)。通过三聚氰胺中丰富的氮源,可以调整 Co4N 纳米晶体的直径和分布使其均匀。此外,由于具有更高的氮掺杂含量、更好的导电性、更高的石墨化程度和更大的电化学表面积等优点,Co4N@NC-m 具有优异的氧还原反应(半波电位为 0.87 V)和析氧反应(10 mA cm−2 时 398 mV 的过电位)在碱性溶液中的活性。