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Zhen He, Jiaming Liu, Yuqian Wei, Yunfei Song, Wuxin Yang, Aobo Yang, Yuxin Wang, and Bo Li, Polypyrrole-coated triple-layer yolk–shell Fe2O3 anode materials with their superior overall performance in lithium-ion batteries, Int. J. Miner. Metall. Mater., 31(2024), No. 12, pp.2737-2748. https://dx.doi.org/10.1007/s12613-024-2954-0
Zhen He, Jiaming Liu, Yuqian Wei, Yunfei Song, Wuxin Yang, Aobo Yang, Yuxin Wang, and Bo Li, Polypyrrole-coated triple-layer yolk–shell Fe2O3 anode materials with their superior overall performance in lithium-ion batteries, Int. J. Miner. Metall. Mater., 31(2024), No. 12, pp.2737-2748. https://dx.doi.org/10.1007/s12613-024-2954-0
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聚吡咯涂层三层蛋黄壳Fe2O3负极材料及其在锂离子电池中的卓越综合性能

摘要: 氧化铁(Fe2O3)作为一种极具吸引力的阳极候选材料,在迅速扩展的储能市场中崭露头角。然而作为电极材料,它在循环过程中会经历显著的体积变化,导致电池循环寿命大幅缩短。本文创新性地合成了均匀涂覆导电聚吡咯层(Fe2O3@Ppy-TLY)的三层蛋黄壳结构Fe2O3,为制备高性能Fe2O3阳极材料开辟了新途径。均匀的聚吡咯涂层不仅引入了更多的反应位点和吸附位点,还在充放电过程中保持了结构的稳定性。作为锂离子电池的电极材料,Fe2O3@Ppy-TLY 展现出卓越的锂存储性能,包括高可逆比容量(在1 C下循环500次后仍能保持1375.11 mAh⋅g−1的放电容量)、优异的循环稳定性(在6000次循环后仍能保持 544.33 mAh⋅g−1),以及优异的大电流充放电性能(在15 C下循环10000次后仍能保持156.75 mAh⋅g−1的可逆容量)。本研究展示了Fe2O3阳极设计的创新进展,旨在提升其在储能领域的应用性能。

 

Polypyrrole-coated triple-layer yolk–shell Fe2O3 anode materials with their superior overall performance in lithium-ion batteries

Abstract: Iron oxide (Fe2O3) emerges as a highly attractive anode candidate among rapidly expanding energy storage market. Nonetheless, its considerable volume changes during cycling as an electrode material result in a vast reduced battery cycle life. In this work, an approach is pioneered for preparing high-performance Fe2O3 anode materials, by innovatively synthesizing a triple-layer yolk–shell Fe2O3 uniformly coated with a conductive polypyrrole (Ppy) layer (Fe2O3@Ppy-TLY). The uniform polypyrrole coating introduces more reaction sites and adsorption sites, and maintains structure stability through charge-discharge process. In the uses as lithium-ion battery electrodes, Fe2O3@Ppy-TLY demonstrates high reversible specific capacity (maintaining a discharge capacity of 1375.11 mAh·g−1 after 500 cycles at 1 C), exceptional cycling stability (retaining the steady charge-discharge performance at 544.33 mAh·g−1 after 6000 ultrafast charge-discharge cycles at a 10 C current density), and outstanding high current charge-discharge performance (retaining a reversible capacity of 156.75 mAh·g−1 after 10000 cycles at 15 C), thereby exhibiting superior lithium storage performance. This work introduces innovative advancements for Fe2O3 anode design, aiming to enhance its performance in energy storage fields.

 

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