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多功能酸盐/碳纳米管双层修改分离器,用于高性能硫电池

Jing Hu^1,2, Zhenyu Wang¹, Huimin Yuan¹

¹Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.

ACS applied materials & interfaces

|July 22, 2024

概括

使用酸盐和碳纳米管的新分离器涂层通过减少聚硫化物穿和树生长,显著改善了硫电池 (LSB). 这提高了商业应用的电池性能和寿命.

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:

硫电池 (LSB) 面临的挑战包括树的生长和聚硫化物穿效应,阻碍了商业化.
开发先进的分离器对于克服这些局限性和提高LSB性能至关重要.

研究的目的:

通过在聚烯 (PP) 分离器上涂层碳纳米管 (CNT) 和酸盐 (LP) 来制造一个多功能分离器.
通过抑制树生长和聚硫化物穿来提高LSB的电化学性能.

主要方法:

在商用PP分离器上对LP和CNTs进行连续涂层.
修改后的分离器结构和性能的描述.
用修改过的分离器对LSB进行电化学测试,包括速率和周期性性能评估.

主要成果:

LP层起到了离子的作用,减少了聚硫化物穿,并促进了均的Li+流量.
该CNT层作为导电层,加速硫化物转化.
LP和CNT的协同效应改善了电解质可湿性,反应动力学,并抑制了Li树突的生长.
带有修改分离器的LSB显著提高了速度和循环性能.

结论:

多功能分离器有效地解决了LSB的关键局限性.
这种方法为隔离器的接口工程提供了一个可行的策略,以加速LSB商业化.

关键词:

二二二二二二二二酸酸是一种酸.硫电池是硫电池的一种.分离器的修改分离器的修改穿效应的穿效应

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