Applied Catalysis2022，Vol.30010.DOI:10.1016/j.apcatb.2021.120712

Cobalt-doped basic iron phosphate as bifunctional electrocatalyst for long-life and high-power-density rechargeable zinc-air batteries

Song, Lutao Zheng, Tianlong Zheng, Lirong Lu, Bin Chen, Hengquan He, Qinggang Zheng, Wanzhen Hou, Yang Lian, Jiale Wu, Yang Chen, Jian Ye, Zhizhen Lu, Jianguo
Applied Catalysis2022，Vol.30010.DOI:10.1016/j.apcatb.2021.120712
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  • NSTL
  • Elsevier

Cobalt-doped basic iron phosphate as bifunctional electrocatalyst for long-life and high-power-density rechargeable zinc-air batteries

Song, Lutao 1Zheng, Tianlong 2Zheng, Lirong 3Lu, Bin 1Chen, Hengquan 2He, Qinggang 2Zheng, Wanzhen 2Hou, Yang 2Lian, Jiale 1Wu, Yang 1Chen, Jian 4Ye, Zhizhen 1Lu, Jianguo1
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作者信息

  • 1. Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Key Lab Biomed Engn,Minist Educ, Hangzhou 310027, Peoples R China
  • 2. Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310027, Peoples R China
  • 3. Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
  • 4. Zhejiang Univ, Sch Mech Engn, State Key Lab Fluid Power & Mechatron Syst, Hangzhou 310027, Peoples R China
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Abstract

High-efficient and long-cycle air cathodes are crucial for the development of rechargeable zinc-air batteries (ZABs). Herein, we develop a strategy of micro-spherical cobalt-doped Fe5(PO4)4(OH)3 center dot H2O (Co-FPOH), synthesized by a novel water-oil two-phase hydrothermal method, which was used as ORR/OER bifunctional electrocatalyst for ZABs. The change of local electronic distribution is identified by doping of Co into Fe5(PO4)4(OH)3 center dot H2O (FPOH), effectively improving the electrocatalytic performance of the resulted Co-FPOH. The OER overpotential of Co-FPOH (290 mV) far outperforms state-of-the-art RuO2 (350 mV); the ORR catalytic reaction of Co-FPOH is near 4e-, almost reaching the theoretical value of Pt/C (n = 4.00). The ZAB assembled with Co-FPOH as an air electrode exhibits an ultralong cycling lifetime of 450 h at 5 mA cm-2, a super high peak power density of 167.8 Wh cm- 2, a high open circuit voltage of about 1.42 V and a large discharge specific capacity of 817 mAh gZn- 1 at 10 mA cm-2. The proposed Co-FPOH is expected to outperform precious metal electrocatalysts as a potential bifunctional electrocatalyst for advanced ZABs. Also, this work offers a novel strategy to synthesize excellent bifunctional electrocatalysts for this kind of energy-related electrocatalytic reactions.

Key words

Cobalt-doped basic iron phosphate/Bifunctional electrocatalyst/Oxygen reduction reaction/Oxygen evolution reaction/Rechargeable Zn-air battery/Water-oil two-phase hydrothermal method

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出版年

2022
Applied Catalysis

Applied Catalysis

ISSN：0926-3373
被引量39
参考文献量68
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