英文论文


文献类型
Journal article (JA)
题名
Engineering Two-Phase Bifunctional Oxygen Electrocatalysts with Tunable and Synergetic Components for Flexible Zn-Air Batteries
作者
Niu, Yanli; Teng, Xue; Gong, Shuaiqi; Xu, Mingze; Sun, Shi-Gang; Chen, Zuofeng
作者单位
[Niu, Yanli; Teng, Xue; Gong, Shuaiqi; Xu, Mingze; Chen, Zuofeng] Tongji Univ, Sch Chem Sci & Engn, Shanghai Key Lab Chem Assessment & Sustainabil, Shanghai 200092, Peoples R China. [Sun, Shi-Gang] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China.
通讯作者地址
Tongji Univ, Sch Chem Sci & Engn, Shanghai Key Lab Chem Assessment & Sustainabil, Shanghai 200092, Peoples R China.; Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China.
Email
sgsun@xmu.edu.cn; zfchen@tongji.edu.cn
ResearchID
ORCID
期刊名称
Nano-Micro Letters
出版社
Springer Science and Business Media B.V.
ISSN
2311-6706
出版信息
2021-12, 13 (1):.
JCR
1
影响因子
ISBN
基金
National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21872105, 22072107]; Science & Technology Commission of Shanghai MunicipalityScience & Technology Commission of Shanghai Municipality (STCSM) [19DZ2271500]
会议名称
会议地点
会议开始日期
会议结束日期
关键词
Conversion efficiency; Density functional theory; Doping (additives); Electrocatalysts; Electrodes; Electrolytes; Hydrogels; Iron compounds; Mechanical stability; Oxygen; Oxygen reduction reaction; Reaction intermediates; Reaction kinetics
摘要
HighlightsA novel heterostructured bimetallic Co/CoFe nanomaterial supported on nanoflower-like N-doped graphitic carbon (NC) is prepared through a strategy of coordination construction-cation exchange-pyrolysis.The Co/CoFe@NC exhibits high bifunctional activities with a remarkably small potential gap of 0.70 V between oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), which can be used in liquid and flexible quasi-solid-state rechargeable Zn-air batteries.The density functional theory calculations reveal optimized adsorption energies for intermediates of ORR and OER on heterostructured Co/CoFe@NC. AbstractMetal-air batteries, like Zn-air batteries (ZABs) are usually suffered from low energy conversion efficiency and poor cyclability caused by the sluggish OER and ORR at the air cathode. Herein, a novel bimetallic Co/CoFe nanomaterial supported on nanoflower-like N-doped graphitic carbon (NC) was prepared through a strategy of coordination construction-cation exchange-pyrolysis and used as a highly efficient bifunctional oxygen electrocatalyst. Experimental characterizations and density functional theory calculations reveal the formation of Co/CoFe heterostructure and synergistic effect between metal layer and NC support, leading to improved electric conductivity, accelerated reaction kinetics, and optimized adsorption energy for intermediates of ORR and OER. The Co/CoFe@NC exhibits high bifunctional activities with a remarkably small potential gap of 0.70 V between the half-wave potential (E-1/2) of ORR and the potential at 10 mA cm(2) (E-j=10) of OER. The aqueous ZAB constructed using this air electrode exhibits a slight voltage loss of only 60 mV after 550-cycle test (360 h, 15 days). A sodium polyacrylate (PANa)-based hydrogel electrolyte was synthesized with strong water-retention capability and high ionic conductivity. The quasi-solid-state ZAB by integrating the Co/CoFe@NC air electrode and PANa hydrogel electrolyte demonstrates excellent mechanical stability and cyclability under different bending states.
一级学科
Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
WOS入藏号
WOS:000658429800001
EI收录号
20212010364438
DOI
10.1007/s40820-021-00650-2
ESI
收录于
SCIE, EI

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