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高体积容量FeS₂/SPAN复合材料,具有促进动力学,用于Li-S电池

Chenran Hao¹, Jiqiong Liu¹, Qihang Wang¹

¹Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.

|June 28, 2025

概括

用FeS2纳米点和碳纳米管增强了硫化聚烯二 (SPAN) 阴极. 这种复合材料实现了更高的硫含量和体积容量,克服了SPAN.

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
储能储能储能储能储能储能

背景情况:

硫化聚烯 (SPAN) 在碳酸电解质中提供固相转化,防止聚硫化物溶解和自放电.
SPAN的局限性包括低硫含量,缓慢的氧化还原动力学和体积能量密度差,阻碍了其实际应用.

研究的目的:

通过结合FeS2纳米点和碳纳米管来提高SPAN的电化学性能.
为了提高基于硫的阴极在含硫量较高时的动态性能,体积容量和稳定性.

主要方法:

使用喷雾颗粒制造的FeS2/SPAN复合阴极的制造.
复合材料结构,离子/电子传输通道和阴极接口稳定性的特征.
电化学测试包括循环稳定性,速率性能和高质量负载时体积容量测量.

主要成果:

FeS2/SPAN复合阴极在0.5°C的140个循环后显示出683.56mAhg-1的高特异性容量,容量保留91.90%.
在0.2°C的温度下达到716.19Ah L-1的体积容量,面积大小负载为6.1mg cm-2.
喷雾颗粒化方法导致间隔的二次粒子,促进离子/电子运输和稳定的阴极接口.

结论:

该FeS2/SPAN复合物有效地解决了纯SPAN的局限性,提供了更好的电化学性能.
这种方法为开发用于先进电池的高能量密度硫基阴极材料提供了可行的策略.
在高硫负载下增强的动态性能和体积容量为下一代储能解决方案铺平了道路.

关键词:

-S电池电池的使用情况.含有高硫含量的人.具有高体积容量的容量.铁硫化物铁硫化物是什么反应动力学反应动力学硫化聚烯二二烯的硫化聚烯二

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