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通过原子接口工程优化FeS₂阳极的可逆相变向快充存储:理论预测和实验验证

Wenxi Zhao^1,2,3, Yanbing Zhou⁴, Hao Zhou¹

¹School of Electronic Information Engineering, Yangtze Normal University, Fuling, Chongqing, 408100, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|November 18, 2024

概括

铁二硫化 (FeS2) 储存被一种新型的FeS2/单原子@配合碳 (SAs Mn@NC) 催化剂增强. 这种材料提高了离子传输和稳定性,克服了更好的离子电池的容量退化.

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:

铁二硫化 (FeS2) 对储存有希望,但由于不可逆转的相变和聚硫化溶解,其容量受损.
优化FeS2基材料的离子运输动力学和结构稳定性对于提高离子电池性能至关重要.

研究的目的:

为了应对FeS2储存中的快速容量退化和电极故障的挑战.
开发一种新型复合材料,增强离子导电性,电荷转移和Na+吸附.

主要方法:

理论计算指导了FeS2纳米颗粒的设计,与单原子相结合,通过原子接口工程在添加碳纳米片 (FeS2/SAs Mn@NC) 上支.
采用了系统的电化学分析,动力学研究和现场表征.
该材料在充满离子的电池和电容器中进行了测试.

主要成果:

FeS2/SAs Mn@NC复合材料显著提高了离子导电性和电荷转移效率.
单原子催化剂 (SAs Mn@NC) 有效地降低了分解障碍,促进了可逆相变和聚硫化物分解.
该材料表现出卓越的速率能力,卓越的周期性耐用性,以及在完整的电池和电容器中令人印象深刻的电化学性能.

结论:

通过将FeS2与SAS Mn@NC相合的原子接口工程提供了一种可行的策略,以克服FeS2在高性能储存中的局限性.
开发的FeS2/SAs Mn@NC材料为先进的离子电池和储能设备提供了一个有前途的途径.

关键词:

阳极是一种极.类似蜂状的FeS2/SAs Mn@NC 是一个可逆相位转换的可逆相位转换.一个原子催化剂.在离子电池中使用.

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