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原子规模接口工程为先进的硫电池构建高效的电催化剂

Bo Jiang^1,2, Chenghao Zhao¹, Yu Zhang³

¹State Key Laboratory of Urban-rural Water Resources and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China.

|May 7, 2025

概括

研究人员开发了对Fe2O3-CeO2异构的原子规模控制,用于先进的硫电池. 这些接口增强了氧化还原动力学,抑制了聚硫化物穿,改善了长期稳定性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
纳米技术纳米技术

背景情况:

异构材料为优化硫 (Li-S) 电池提供协同性能.
对异构结构接口的精确原子尺度控制仍然是一个重大挑战.
了解对异构结构性质的接口效应对于Li-S电池的开发至关重要.

研究的目的:

介绍Fe2O3-CeO2异构结构的原子级调节策略.
研究高能Fe2O3-CeO2接口对Li-S电池性能的影响.
为了阐明界面微观结构和硫种的催化活性之间的关系.

主要方法:

制造Fe2O3八十二面体作为CeO2纳米晶体异质生长的基质.
原子尺度的表征和理论计算来分析接口相互作用.
包含工程Fe2O3-CeO2异构结构的Li-S电池的电化学测试.

主要成果:

成功构建了Fe2O3-CeO2异构结构,在高能界面上具有特定的原子排列.
在Fe2O3和CeO2之间表现出强烈的界面电子转移,增强了硫种的吸附和催化活性.
取得了优异的Li-S电池性能:在2000个循环中,每个周期的容量衰减为0.016%,在高硫负载时的7.53 mAh cm-2面积容量.

结论:

接口微结构的原子尺度调节是优化异构催化剂的关键.
设计的Fe2O3-CeO2接口有效地抑制了聚硫化物的转移,并加速了硫的转化.
这项工作为设计高性能Li-S电池的先进电催化剂提供了途径.

关键词:

原子尺度界面工程是原子尺度的界面工程.电催化剂是一种电催化剂.异构结构的材料是异构结构的材料.硫电池是硫电池的一种.氧化还原动力学

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