Hierarchical Co3O4 Nano‐Micro Arrays Featuring Superior Activity as Cathode in a Flexible and Rechargeable Zinc–Air Battery
Abstract All‐solid‐state zinc–air batteries are characterized as low cost and have high energy density, providing wearable devices with an ideal power source. However, the sluggish oxygen reduction and evolution reactions in air cathodes are obstacles to its flexible and rechargeable application. He...
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doaj-8cc76b6d3ca14ea795ed42a6ca046c072020-11-25T01:49:09ZengWileyAdvanced Science2198-38442019-06-01611n/an/a10.1002/advs.201802243Hierarchical Co3O4 Nano‐Micro Arrays Featuring Superior Activity as Cathode in a Flexible and Rechargeable Zinc–Air BatteryYaotang Zhong0Zhenghui Pan1Xianshu Wang2Jie Yang3Yongcai Qiu4Shuyuan Xu5Yitong Lu6Qiming Huang7Weishan Li8School of Chemistry and Environment South China Normal University Guangzhou 510006 ChinaSchool of Chemistry and Environment South China Normal University Guangzhou 510006 ChinaSchool of Chemistry and Environment South China Normal University Guangzhou 510006 ChinaSchool of Environment & Energy South China University of Technology Guangzhou 510006 Guangdong ChinaSchool of Environment & Energy South China University of Technology Guangzhou 510006 Guangdong ChinaSchool of Chemistry and Environment South China Normal University Guangzhou 510006 ChinaSchool of Chemistry and Environment South China Normal University Guangzhou 510006 ChinaSchool of Chemistry and Environment South China Normal University Guangzhou 510006 ChinaSchool of Chemistry and Environment South China Normal University Guangzhou 510006 ChinaAbstract All‐solid‐state zinc–air batteries are characterized as low cost and have high energy density, providing wearable devices with an ideal power source. However, the sluggish oxygen reduction and evolution reactions in air cathodes are obstacles to its flexible and rechargeable application. Herein, a strategy called MOF‐on‐MOF (MOF, metal‐organic framework) is presented for the structural design of air cathodes, which creatively develops an efficient oxygen catalyst comprising hierarchical Co3O4 nanoparticles anchored in nitrogen‐doped carbon nano‐micro arrays on flexible carbon cloth (Co3O4@N‐CNMAs/CC). This hierarchical and free‐standing structure design guarantees high catalyst loading on air cathodes with multiple electrocatalytic activity sites, undoubtedly boosting reaction kinetics, and energy density of an all‐solid‐state zinc–air battery. The integrated Co3O4@N‐CNMAs/CC cathode in an all‐solid‐state zinc–air battery exhibits a high open circuit potential of 1.461 V, a high capacity of 815 mAh g−1 Zn at 1 mA cm−2, a high energy density of 1010 Wh kg−1 Zn, excellent cycling stability as well as outstanding mechanical flexibility, significantly outperforming the Pt/C‐based cathode. This work opens a new door for the practical applications of rechargeable zinc–air batteries in wearable electronic devices.https://doi.org/10.1002/advs.201802243cathodesCo3O4; nano‐micro arrayssuperior activitieszinc–air batteries |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yaotang Zhong Zhenghui Pan Xianshu Wang Jie Yang Yongcai Qiu Shuyuan Xu Yitong Lu Qiming Huang Weishan Li |
spellingShingle |
Yaotang Zhong Zhenghui Pan Xianshu Wang Jie Yang Yongcai Qiu Shuyuan Xu Yitong Lu Qiming Huang Weishan Li Hierarchical Co3O4 Nano‐Micro Arrays Featuring Superior Activity as Cathode in a Flexible and Rechargeable Zinc–Air Battery Advanced Science cathodes Co3O4; nano‐micro arrays superior activities zinc–air batteries |
author_facet |
Yaotang Zhong Zhenghui Pan Xianshu Wang Jie Yang Yongcai Qiu Shuyuan Xu Yitong Lu Qiming Huang Weishan Li |
author_sort |
Yaotang Zhong |
title |
Hierarchical Co3O4 Nano‐Micro Arrays Featuring Superior Activity as Cathode in a Flexible and Rechargeable Zinc–Air Battery |
title_short |
Hierarchical Co3O4 Nano‐Micro Arrays Featuring Superior Activity as Cathode in a Flexible and Rechargeable Zinc–Air Battery |
title_full |
Hierarchical Co3O4 Nano‐Micro Arrays Featuring Superior Activity as Cathode in a Flexible and Rechargeable Zinc–Air Battery |
title_fullStr |
Hierarchical Co3O4 Nano‐Micro Arrays Featuring Superior Activity as Cathode in a Flexible and Rechargeable Zinc–Air Battery |
title_full_unstemmed |
Hierarchical Co3O4 Nano‐Micro Arrays Featuring Superior Activity as Cathode in a Flexible and Rechargeable Zinc–Air Battery |
title_sort |
hierarchical co3o4 nano‐micro arrays featuring superior activity as cathode in a flexible and rechargeable zinc–air battery |
publisher |
Wiley |
series |
Advanced Science |
issn |
2198-3844 |
publishDate |
2019-06-01 |
description |
Abstract All‐solid‐state zinc–air batteries are characterized as low cost and have high energy density, providing wearable devices with an ideal power source. However, the sluggish oxygen reduction and evolution reactions in air cathodes are obstacles to its flexible and rechargeable application. Herein, a strategy called MOF‐on‐MOF (MOF, metal‐organic framework) is presented for the structural design of air cathodes, which creatively develops an efficient oxygen catalyst comprising hierarchical Co3O4 nanoparticles anchored in nitrogen‐doped carbon nano‐micro arrays on flexible carbon cloth (Co3O4@N‐CNMAs/CC). This hierarchical and free‐standing structure design guarantees high catalyst loading on air cathodes with multiple electrocatalytic activity sites, undoubtedly boosting reaction kinetics, and energy density of an all‐solid‐state zinc–air battery. The integrated Co3O4@N‐CNMAs/CC cathode in an all‐solid‐state zinc–air battery exhibits a high open circuit potential of 1.461 V, a high capacity of 815 mAh g−1 Zn at 1 mA cm−2, a high energy density of 1010 Wh kg−1 Zn, excellent cycling stability as well as outstanding mechanical flexibility, significantly outperforming the Pt/C‐based cathode. This work opens a new door for the practical applications of rechargeable zinc–air batteries in wearable electronic devices. |
topic |
cathodes Co3O4; nano‐micro arrays superior activities zinc–air batteries |
url |
https://doi.org/10.1002/advs.201802243 |
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