首页|Superhydrophobic Co/Fe sulfide nanoparticles and single-atoms doped carbon nanosheets composite air cathode for high-performance zinc-air batteries

Superhydrophobic Co/Fe sulfide nanoparticles and single-atoms doped carbon nanosheets composite air cathode for high-performance zinc-air batteries

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Development of a high-performance bifunctional catalyst is essential for the actual implementation of zinc-air batteries in practical applications.Herein,a bifunctional cathode of Co3S4/FeS heterogeneous nanoparticles embedded in Co/Fe single-atom-loaded nitrogen-doped carbon nanosheets is designed.Cobalt-iron sulfides and single atomic sites with Co-N4/Fe-N4 configurations are confirmed to coexist on the carbon matrix by EXAFS spectroscopy.3D self-supported super-hydrophobic multiphase compos-ite cathode provides abundant active sites and facilitates gas-liquid-solid three-phase interface reactions,resulting in excellent electrocatalytic activity and batteries performance,i.e.,an OER overpotential(η10)of 260 mV,a half-wave potential(E1/2)of 0.872 V for ORR,a ΔE of 0.618 V,and a discharge power density of 170 mW cm-2,a specific capacity of 816.3 mAh g-1.DFT analysis shows multiphase coupling of sulfide heterojunction through single-atomic metal doped carbon nanosheets reduces offset on center of elec-tronic density of states before and after oxygen adsorption,and spin density of adsorbed oxygen with same spin orientation,leading to weakened charge/spin interactions between adsorbed oxygen and sub-strate,and a lowered oxygen adsorption energy to accelerate OER/ORR.

Zn-air batterySuperhydrophobic interfaceMetal sulfideHeterostructureSpin density

Yan Tan、Yijie Wang、Aoshuang Li、Xiucai Jiang、Yuzhong Zhang、Chuanwei Cheng

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Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaScience and Technology Commission of Shanghai MunicipalityShanghai Key Laboratory of Special Artificial Microstructure Materials and Technology

51772213120042831227432421JC405700

2024

10.1016/j.jechem.2024.05.013

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.96(9)