谷氨胺排斥吸附剂对高稳定硫电池的金属表面的阴离子电荷效应
Chaehyeong Lee1,2, Jin Won Kim1,2,3, Jaeyoung Lee1,2,3
1School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-Ro, Gwangju, 61005, South Korea. jaeyoung@gist.ac.kr.
Dalton transactions (Cambridge, England : 2003)
|January 30, 2024
概括
这项研究引入了谷氨胺作为硫电池 (LSB) 的电解质添加剂,通过防止树突形成和聚硫化物穿以延长电池寿命,显著提高了循环稳定性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 硫电池 (LSB) 的能量密度比离子电池 (LiB) 高.
- 由于聚硫化物穿和树形成,LSBs的商业化受到长期循环性能差的阻碍.
- 对于LSB稳定性的现有解决方案是不够的.
研究的目的:
- 为了提高硫电池的循环稳定性.
- 研究氨基酸谷氨胺作为LSB中的电解质添加剂的潜力.
- 为了减轻聚硫化物穿和树生长.
主要方法:
- 使用谷氨的电解质添加剂配方.
- 用谷氨胺添加剂对LSB进行电化学测试.
- 分析离子流量,涂层/剥离过电压和聚硫化物氧化回氧反应.
- 在高C率下对长期骑自行车性能进行评估.
主要成果:
- 添加谷氨胺有效地使离子流同质化,防止树状石的形成.
- 添加剂减少了涂层和剥离过程中的过电压.
- 观察到多硫化物增强的氧化还原反应,减轻了穿.
- 细胞降解率显著降低 (大约. 0.066%) 在高C率循环过程中实现.
结论:
- 胺是一种有前途的电解质添加剂,可提高硫电池的稳定性和寿命.
- 该机制涉及调节离子流量和增强聚硫化物化学.
- 这种方法提供了一种可行的策略,以克服LSB商业化中的关键挑战.
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