一种由MoS修改的异构凝聚合物电解质,用于高性能硫电池
Ziyun Chi1, Jianlong Ding1, Chao Ding1
1Shanghai Engineering Research Center of Hierarchical Nanomaterials, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.
ACS applied materials & interfaces
|August 9, 2023
概括
这项研究引入了一种具有MoS2@rGO涂层的新型凝电解质,通过抑制聚硫化物穿和树突来提高硫 (Li-S) 电池性能. 开发的Li-S电池显示出出色的容量保留和循环稳定性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 硫 (Li-S) 电池面临着诸如聚硫化物穿和树生长等挑战,限制了循环寿命.
- 解决Li-S电池中的不同化学环境对于提高性能至关重要.
研究的目的:
- 为高性能Li-S电池开发具有单面电催化涂层的异构凝电解质.
- 为了减轻 Li-S 细胞中的穿效应和树状物问题.
主要方法:
- 使用MoS2@rGO涂层 (MoS2@rGO-GPE) 制造一个异构的聚乙烯酸-共离子液体) 凝电解质.
- 组装一个Li-S电池,使用自支石墨烯硫阴极和开发的凝电解质.
- 电解质的离子导电性和离子转移数的表征.
主要成果:
- 这种MoS2@rGO-GPE的离子导电率为1.98 mS cm-1,离子转移数为0.81.
- 组装的Li-S电池在0.1°C时实现了1027mAhg-1的高初始放电能力.
- 经过500个循环后80%的容量保留和出色的速率性能,证明了卓越的循环稳定性.
结论:
- 异构的MoS2@rGO-GPE通过多位置机制有效地抑制了穿效应.
- 开发的Li-S电池设计为实现高性能和长周期寿命的储能设备提供了一个有前途的战略.
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