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硫阴极的高度分支的烯结合剂,具有增强的性能和寿命

Luke Hencz¹, Hao Chen^1,2, Zhenzhen Wu¹

¹Centre for Clean Environment and Energy, School of Environment and Science Griffith University, Gold Coast Campus Southport Queensland Australia.

Exploration (Beijing, China)

|June 16, 2023

概括

高分支氨基乙烯 (HBA) 作为硫电池的可持续粘合剂,显著改善了循环寿命和性能. 这种生物灵感材料增强了阴极稳定性,减少了聚硫化物穿,克服了电池技术的关键局限性.

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
可持续能源可持续能源

背景情况:

硫 (Li-S) 电池面临的挑战是硫阴极的机械不稳定性和多硫化物溶解.
像PVDF这样的传统粘合剂提供有限的性能和环境缺点.

研究的目的:

为Li-S电池硫阴极开发一种低成本,无毒,环保的水性粘合剂.
为了研究高分支胺氨酸 (HBA) 作为一种粘合剂的有效性,以天然粘合剂为灵感.

主要方法:

从自然来源提取高度分支的氨基白蛋白 (HBA).
使用HBA作为阴极粘合剂制造Li-S电池电池.
与传统粘合剂相比,电化学性能测试和循环稳定性分析.

主要成果:

基于HBA的Li-S细胞表现出比使用PVDF或低分支多糖体的Li-S细胞更好的电化学性能.
HBA粘合剂增强了阴极机械强度和离子导电性,在循环过程中保持了框架完整性.
通过基团和C-S键形成,HBA表现出改善的聚硫化物保留,抑制了穿效应.

结论:

高分支氨基乙烯 (HBA) 是硫电池阴极的高效和可持续的粘合剂.
由于增强的机械性能和聚硫化物捕获,HBA可实现长周期寿命 (在2°C下500个周期),并且由于增强的机械性能和聚硫化物捕获,最小的容量色 (每周期0.104%).
这种以生物为灵感的方法为开发先进和环保的储能解决方案提供了有希望的途径.

关键词:

结合剂结合剂结合剂高度分支的氨基菌素.硫电池是硫电池的一种.低分支的多糖是低分支的多糖.

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