Wen-Xue Chen, Yue Du, Li-Na Zhou, Zhi-Yi Zhong, Zhi-Xian Shi, Yan Mao, Zi-Quan Zhou, Hao-Yue Feng, Yu Su, Hai-Yan Hu, Shi Li, Dong-Bin Xiong, Jian-Qin Zhou, Yi-Si Liu, Yao Xiao
{"title":"An universal in-situ phosphating strategy to fabricate high-performance Co2P-based bifunctional oxygen electrocatalyst derived from conjugated polyaniline-phytic acid copolymer","authors":"Wen-Xue Chen, Yue Du, Li-Na Zhou, Zhi-Yi Zhong, Zhi-Xian Shi, Yan Mao, Zi-Quan Zhou, Hao-Yue Feng, Yu Su, Hai-Yan Hu, Shi Li, Dong-Bin Xiong, Jian-Qin Zhou, Yi-Si Liu, Yao Xiao","doi":"10.1007/s12598-024-02770-1","DOIUrl":null,"url":null,"abstract":"<p>Electrocatalysts play a crucial role in the performance of rechargeable Zn-air batteries (ZABs), but it is still difficult to produce nonprecious materials with excellent bifunctional oxygen reduction reactions (ORR) and oxygen evolution reactions (OER). Herein, conjugated polyaniline-phytic acid polymer (pANI-PA) was directly calcined to fabricate Co<sub>2</sub>P nanoparticles embedded in N, P-doped carbon network composites (Co<sub>2</sub>P@pDC-PA) for metal-air cathodes. The resulting pANI-PA derived Co<sub>2</sub>P-based carbon composite exhibits exceptional bifunctional ORR/OER activities with a half-wave potential of 0.79 V for ORR and 1.62 V of over-potential for OER at 10 mA·cm<sup>−2</sup>. Owing to the synergistic effect of its unique three-dimensional (3D) structure, N, P-doped carbon framework, and encapsulated Co<sub>2</sub>P nanoparticles, as-fabricated composite can be used as a highly efficient air cathode in the rechargeable metal-air battery. The assembled rechargeable ZAB demonstrates a high-power density of 190.0 mW·cm<sup>−2</sup> and remarkable cycling stability over 1000 h. This study introduced a novel approach that paves the way for the efficient, cost-effective, and scalable production of bifunctional electrocatalysts for rechargeable ZABs.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":null,"pages":null},"PeriodicalIF":9.6000,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rare Metals","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s12598-024-02770-1","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Electrocatalysts play a crucial role in the performance of rechargeable Zn-air batteries (ZABs), but it is still difficult to produce nonprecious materials with excellent bifunctional oxygen reduction reactions (ORR) and oxygen evolution reactions (OER). Herein, conjugated polyaniline-phytic acid polymer (pANI-PA) was directly calcined to fabricate Co2P nanoparticles embedded in N, P-doped carbon network composites (Co2P@pDC-PA) for metal-air cathodes. The resulting pANI-PA derived Co2P-based carbon composite exhibits exceptional bifunctional ORR/OER activities with a half-wave potential of 0.79 V for ORR and 1.62 V of over-potential for OER at 10 mA·cm−2. Owing to the synergistic effect of its unique three-dimensional (3D) structure, N, P-doped carbon framework, and encapsulated Co2P nanoparticles, as-fabricated composite can be used as a highly efficient air cathode in the rechargeable metal-air battery. The assembled rechargeable ZAB demonstrates a high-power density of 190.0 mW·cm−2 and remarkable cycling stability over 1000 h. This study introduced a novel approach that paves the way for the efficient, cost-effective, and scalable production of bifunctional electrocatalysts for rechargeable ZABs.
期刊介绍:
Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.