Fe3C decorated wood-derived integral N-doped C cathode for rechargeable Li-O2 batteries

Liang, Huagen; Gai, Zejia; Chen, Fu; Jing, Shengyu; Kan, Wei; Zhao, Bing; Yin, Shibin; Tsiakaras, Panagiotis

doi:10.1016/j.apcatb.2022.122203

Cited by 14 publications

(1 citation statement)

References 57 publications

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“…Even though noble metal-based catalysts exhibit significant improvements in the catalytic activity of the ORR and OER compared with other transition metals, their liability and expensive price limit their broad use in the field. Therefore, many other carbon-support catalysts, including transition metal, transition metal oxide [ 19 , 20 , 21 , 22 , 23 , 24 ], and transition metal carbide [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ] electrocatalysts, are expected to be reliable substitutes because of their low cost, abundant resources, good conductivity, diverse valence states, and high catalytic efficiency. In this way, one- or two-dimensional nanomaterials modified with transition metals or their metal carbides, oxides, or nitrides are considered one of the most promising catalysts for commercialization.…”

Section: Introductionmentioning

confidence: 99%

Efficient Fe3C-CF Cathode Catalyst Based on the Formation/Decomposition of Li2−xO2 for Li-O2 Batteries

Jiang

et al. 2023

Molecules

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Lithium-oxygen batteries have attracted considerable attention in the past several years due to their ultra-high theoretical energy density. However, there are still many serious issues that must be addressed before considering practical applications, including the sluggish oxygen redox kinetics, the limited capacity far from the theoretical value, and the poor cycle stability. This study proposes a surface modification strategy that can enhance the catalytic activity by loading Fe3C particles on carbon fibers, and the microstructure of Fe3C particle-modified carbon fibers is studied by multiple materials characterization methods. Experiments and density functional theory (DFT) calculations show that the discharge products on the Fe3C carbon fiber (Fe3C-CF) cathode are mainly Li2−xO2. Fe3C-CF exhibits high catalytic ability based on its promotion of the formation/decomposition processes of Li2−xO2. Consequently, the well-designed electrode catalyst exhibits a large specific capacity of 17,653.1 mAh g−1 and an excellent cyclability of 263 cycles at a current of 200 mA g−1.

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Section: Introductionmentioning

confidence: 99%

Efficient Fe3C-CF Cathode Catalyst Based on the Formation/Decomposition of Li2−xO2 for Li-O2 Batteries

Jiang

et al. 2023

Molecules

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Unravelling the Capacity Degradation Mechanism of Thick Electrodes in Lithium‐Carbon Dioxide Batteries via Visualization and Quantitative Techniques

Zhang,

Xiao,

Yan

et al. 2024

Adv Funct Materials

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Lithium‐carbon dioxide batteries (LCBs) require a thick cathode electrode to fulfill their theoretical energy density and high areal capacity (mAh cm−2). However, understanding the design of thick porous electrodes in LCBs is challenging because of the complexity of coupled multispecies transport. Herein, a link is established between the microscopic behaviors of thick electrodes and macroscopic electrochemical performance through a spatio‐temporal resolution technique, filling the gap in knowledge on the degradation mechanism of thick electrodes. Surprisingly, the worst utilization site with the least product deposition is in the central part of the electrode rather than the traditionally presumed separator face. The secondary structure and reaction pathway of solid products exhibit a clear tendency toward spatial growth (on the electrode surface or in the interior). Combined with quantitative modeling, a critical current density shifting the dominance is found from CO2 to Li+ ions, thereby reversing the gradient of the product distribution. Finally, a hotspot map of failure mechanisms with different operating protocols is provided, serving as a guideline for the future design of thick electrodes. This work breaks the knowledge of multi‐field coupling within porous thick electrodes and can be extended to advanced Na (Li)‐CO2 (O2) battery design.

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Dual-type atomic Ru promoted bifunctional catalytic process realizing ultralow overpotential for Li-O2 batteries

Guo,

Wang,

Liu

et al. 2024

Applied Catalysis B: Environment and Energy

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Fe3C decorated wood-derived integral N-doped C cathode for rechargeable Li-O2 batteries

Cited by 14 publications

References 57 publications

Efficient Fe3C-CF Cathode Catalyst Based on the Formation/Decomposition of Li2−xO2 for Li-O2 Batteries

Efficient Fe3C-CF Cathode Catalyst Based on the Formation/Decomposition of Li2−xO2 for Li-O2 Batteries

Unravelling the Capacity Degradation Mechanism of Thick Electrodes in Lithium‐Carbon Dioxide Batteries via Visualization and Quantitative Techniques

Dual-type atomic Ru promoted bifunctional catalytic process realizing ultralow overpotential for Li-O2 batteries

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