Fe2O3 nano particles embedded Fe2O3/BP2000 composite for Li-S battery

IF 2.5 4区材料科学 Q2 CHEMISTRY, APPLIED

Journal of Porous Materials Pub Date : 2024-05-21 DOI:10.1007/s10934-024-01636-2

Yi Lu, Tao Liu

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引用次数: 0

Abstract

Shuttle effect of lithium polysulfides in lithium sulfur batteries greatly influenced their commercialization. Therefore, it is urgent to develop a cheep and effective way to alleviate the shuttle effect. Fe is an active transition element which has good catalytic ability, in this work, a simple wet impregnation method was used to make Fe ions infiltrate into the pores of BP2000 (a kind of commercial conductive carbon), then it was calcined in N₂ atmosphere to get a Fe₂O₃/BP2000 composite and used as a separator modification layer. The Fe₂O₃ nano particles were decorated in the pores of BP2000 which greatly enhanced the absorption ability on lithium polysulfides, additionally it also showed excellent catalytic effect on lithium polysulfides, thus the Fe₂O₃/BP2000 layer can be served as a secondary collector to re-engage the polysulfides in the cathode reaction. In this way, the lithium sulfur batteries equipped with the Fe₂O₃/BP2000 modified separator showed impressive electrochemical performances.

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用于锂-S 电池的嵌入 Fe2O3/BP2000 复合材料的 Fe2O3 纳米粒子

多硫化锂在锂硫电池中的穿梭效应极大地影响了其商业化。因此，开发一种廉价而有效的方法来缓解穿梭效应迫在眉睫。铁是一种活性过渡元素，具有良好的催化能力，本研究采用简单的湿法浸渍法使铁离子渗入 BP2000（一种商用导电碳）的孔隙中，然后在 N2 气氛中煅烧得到 Fe2O3/BP2000 复合材料，并将其用作隔膜改性层。在 BP2000 的孔隙中装饰的 Fe2O3 纳米颗粒大大提高了对多硫化锂的吸收能力，而且对多硫化锂也有很好的催化作用，因此，Fe2O3/BP2000 层可作为二次收集器，使多硫化物重新参与正极反应。因此，配备了 Fe2O3/BP2000 改性隔膜的锂硫电池显示出令人印象深刻的电化学性能。

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来源期刊

Journal of Porous Materials 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.70%

发文量

203

审稿时长

2.6 months

期刊介绍： The Journal of Porous Materials is an interdisciplinary and international periodical devoted to all types of porous materials. Its aim is the rapid publication of high quality, peer-reviewed papers focused on the synthesis, processing, characterization and property evaluation of all porous materials. The objective is to establish a unique journal that will serve as a principal means of communication for the growing interdisciplinary field of porous materials. Porous materials include microporous materials with 50 nm pores. Examples of microporous materials are natural and synthetic molecular sieves, cationic and anionic clays, pillared clays, tobermorites, pillared Zr and Ti phosphates, spherosilicates, carbons, porous polymers, xerogels, etc. Mesoporous materials include synthetic molecular sieves, xerogels, aerogels, glasses, glass ceramics, porous polymers, etc.; while macroporous materials include ceramics, glass ceramics, porous polymers, aerogels, cement, etc. The porous materials can be crystalline, semicrystalline or noncrystalline, or combinations thereof. They can also be either organic, inorganic, or their composites. The overall objective of the journal is the establishment of one main forum covering the basic and applied aspects of all porous materials.