首页|An universal in-situ phosphating strategy to fabricate high-performance Co2P-based bifunctional oxygen electrocatalyst derived from conjugated polyaniline-phytic acid copolymer

An universal in-situ phosphating strategy to fabricate high-performance Co2P-based bifunctional oxygen electrocatalyst derived from conjugated polyaniline-phytic acid copolymer

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Electrocatalysts play a crucial role in the per-formance of rechargeable Zn-air batteries(ZABs),but it is still difficult to produce nonprecious materials with excel-lent 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-fab-ricated composite can be used as a highly efficient air cathode in the rechargeable metal-air battery.The assem-bled 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 pro-duction of bifunctional electrocatalysts for rechargeable ZABs.

Co2P nanoparticlesPolyaniline-phytic acid polymers(pANI-PA)Bifunctional electrocatalystsRechargeable Zn-air batteries(ZABs)

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

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Hubei Key Laboratory of Photoelectric Materials and Devices,School of Material Science and Engineering,Hubei Normal University,Huangshi 435002,China

College of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325035,China

Hangzhou Hangyang Chemical and Medical Engineering Lo.,Hangzhou 310000,China

Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin 300071,China

Innovative Centre for Flexible Devices(iFLEX),Max Planck-NTU Joint Lab for Artificial Senses,,School of Materials Science and Engineering,Nanyang Technological University,Singapore 639798,Singapore

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2024

10.1007/s12598-024-02770-1

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(11)