基于硫电解质的室温可逆F离子电池,具有温和的阳离子受体添加剂
Yifan Yu1,2,3, Meng Lei1,3, Chilin Li1,2,3
1State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 585 He Shuo Road, Shanghai 201899, China. chilinli@mail.sic.ac.cn.
Materials horizons
|November 15, 2023
概括
可充电的离子电池 (FIB) 在储能方面表现有前途. 这项研究介绍了6-thioguanine作为液体电解质的新型阳离子受体,改善离子溶解和电池性能.
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:
- 可充电离子电池 (FIB) 是一种新兴的储能技术,在能量密度,成本和安全方面具有潜在的优势.
- 与固态电解质相比,液态电解质为FIB提供了更高的离子导电性,使得低温操作成为可能.
- 在开发液体FIB电解质的过程中,一个关键的挑战是化盐在离子溶剂中的有限可溶性.
研究的目的:
- 为了解决现有的离子受体 (AAs) 在溶解化盐的局限性,用于液体FIB电解质.
- 为了研究一种新的非 AA,6-thioguanine,具有中度的易斯酸度,以改善化物离子溶解.
- 为了评估FIBs的电化学性能,使用新型AA的电解质.
主要方法:
- 一个新的非离子受体,6-thioguanine,被合成和特征.
- 用硫溶剂中使用6-thioguanine制备电解质,以溶解化盐.
- 电解质的离子导电性在室温下测量.
- 组装了一个模型FIB硬币电池并进行测试,以评估电化学性能,包括超电位和可逆容量.
主要成果:
- 拟议的6-thioguanine有效地在硫溶剂中溶解了化物离子.
- 在室温下,电解质达到约mS cm-1的离子导电性.
- FIB硬币单元表现出高转换反应可逆性,具有0.36V的低超电位.
- 在40个循环后,可逆容量为126mA hg-1被维持.
结论:
- 6-thioguanine 作为一种有效的非离子接受器,用于液体化物离子电池电解质.
- 6-thioguanine中等的易斯酸度有助于化物离子的溶解,并降低了溶解能量障碍.
- 开发的电解质系统使FIB能够稳定和可逆运行,显示了未来储能应用的潜力.
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