首页|Te-doped Fe3O4 flower enabling low overpotential cycling of Li-CO2 batteries at high current density

Te-doped Fe3O4 flower enabling low overpotential cycling of Li-CO2 batteries at high current density

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Li-CO2 batteries(LCBs)suffer from high overpotentials caused by sluggish CO2 reaction kinetics.This work designs a Te-doped Fe3O4(Te-Fe3O4)flower-like microsphere catalyst to lower the overpotential and improve the reversibility of LCBs.Experimental results reveal that Te doping modifies the electronic structure of Fe3O4 and reduces the overpotential.The stable Te-O bond between Te and C2O4-could effectively inhibit the dispro-portionation reaction of the latter,enabling the Te-Fe3O4 cathodes to exhibit a remarkable capacity(9485 mAh g-1)and a long cycling life(155 cycles)with an overpotential of 1.21 V and an energy efficiency of about 80％at a high current density(2000 mA g-1).Through the interaction between Te and Li2C2O4 to inhibit the dispro-portionation reaction,this work successfully achieves long-term cycling of LCBs with low overpotential at high current density.

Li-CO2 batteriesCatalystTelluriumLi2C2O4Large current density

Huyi Yu、Renshu Huang、Qian Liu、Xingfa Chen、Tianqi Yu、Haiquan Wang、Xincheng Liang、Shibin Yin

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Guangxi Key Laboratory of Electrochemical Energy Materials,School of Chemistry and Chemical Engineering,Guangxi University,100 Daxue Road,Nanning,530004,China

国家自然科学基金广西自然科学基金Innovation Project of Guangxi Graduate EducationInnovation Project of Guangxi Graduate EducationInnovation Project of Guangxi Graduate Education

221620042022JJD120011YCBZ2023012YCSW2023115YCBZ2023048

2024

10.1016/j.cjsc.2024.100253

结构化学
中国化学会 中国科学院福建物质结构研究所

结构化学

影响因子：0.44
ISSN：0254-5861
年,卷(期)：2024.43(3)
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