Three‐dimensional interconnected graphene network‐based high‐performance air electrode for rechargeable zinc‒air batteries

SusMat Pub Date : 2024-05-08 DOI:10.1002/sus2.201
Jia‐Xing An, Yu Meng, Hong-bo Zhang, Yuanzhi Zhu, Xiaohua Yu, Ju Rong, Peng Hou, Chang Liu, Huihang Cheng, Jin‐Cheng Li
{"title":"Three‐dimensional interconnected graphene network‐based high‐performance air electrode for rechargeable zinc‒air batteries","authors":"Jia‐Xing An, Yu Meng, Hong-bo Zhang, Yuanzhi Zhu, Xiaohua Yu, Ju Rong, Peng Hou, Chang Liu, Huihang Cheng, Jin‐Cheng Li","doi":"10.1002/sus2.201","DOIUrl":null,"url":null,"abstract":"Although zinc‒air batteries (ZABs) are regarded as one of the most prospective energy storage devices, their practical application has been restricted by poor air electrode performance. Herein, we developed a free‐standing air electrode that is fabricated on the basis of a multifunctional three‐dimensional interconnected graphene network. Specifically, a three‐dimensional interconnected graphene network with fast mass and electron transport ability, prepared by catalyzing growth of graphene foam on nickel foam and then filling reduced graphene oxide into the pores of graphene foam, is used to anchor iron phthalocyanine molecules with atomic Fe‒N4 sites for boosting the oxygen reduction during discharging and nanosized FeNi hydroxides for accelerating the oxygen evolution during charging. As a result, the obtained air electrode exhibited an ultra‐small electrocatalytic overpotential of 0.603 V for oxygen reactions, a high peak power density of 220.2 mW cm‒2, and a small and stable charge‒discharge voltage gap of 0.70 V at 10 mA cm‒2 after 1136 cycles. Furthermore, in situ Raman spectroscopy together with theoretical calculations confirmed that phase transformation of FeNi hydroxides takes place from α‐Ni(OH)x to β‐Ni(OH)x to γ‐Ni(3+δ)+OOH for the oxygen evolution reaction and Ni is the active center while Fe enhances the activity of Ni active sites.","PeriodicalId":506315,"journal":{"name":"SusMat","volume":" 36","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"SusMat","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/sus2.201","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

Although zinc‒air batteries (ZABs) are regarded as one of the most prospective energy storage devices, their practical application has been restricted by poor air electrode performance. Herein, we developed a free‐standing air electrode that is fabricated on the basis of a multifunctional three‐dimensional interconnected graphene network. Specifically, a three‐dimensional interconnected graphene network with fast mass and electron transport ability, prepared by catalyzing growth of graphene foam on nickel foam and then filling reduced graphene oxide into the pores of graphene foam, is used to anchor iron phthalocyanine molecules with atomic Fe‒N4 sites for boosting the oxygen reduction during discharging and nanosized FeNi hydroxides for accelerating the oxygen evolution during charging. As a result, the obtained air electrode exhibited an ultra‐small electrocatalytic overpotential of 0.603 V for oxygen reactions, a high peak power density of 220.2 mW cm‒2, and a small and stable charge‒discharge voltage gap of 0.70 V at 10 mA cm‒2 after 1136 cycles. Furthermore, in situ Raman spectroscopy together with theoretical calculations confirmed that phase transformation of FeNi hydroxides takes place from α‐Ni(OH)x to β‐Ni(OH)x to γ‐Ni(3+δ)+OOH for the oxygen evolution reaction and Ni is the active center while Fe enhances the activity of Ni active sites.
基于三维互联石墨烯网络的高性能空气电极,用于可充电锌-空气电池
尽管锌空气电池(ZABs)被认为是最有前景的储能设备之一,但其实际应用一直受到空气电极性能不佳的限制。在此,我们开发了一种基于多功能三维互联石墨烯网络制造的独立式空气电极。具体来说,通过在镍泡沫上催化生长石墨烯泡沫,然后在石墨烯泡沫的孔隙中填充还原氧化石墨烯,制备出具有快速质量和电子传输能力的三维互连石墨烯网络。因此,所获得的空气电极在 1136 次循环后,氧反应的超小电催化过电位为 0.603 V,峰值功率密度高达 220.2 mW cm-2,在 10 mA cm-2 的条件下,充放电电压间隙小且稳定,为 0.70 V。此外,原位拉曼光谱和理论计算证实,铁镍氢氧化物在氧进化反应中发生了从α-Ni(OH)x到β-Ni(OH)x再到γ-Ni(3+δ)+OOH的相变,Ni是活性中心,而Fe增强了Ni活性位点的活性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信