全方位的离子液体用于无穿离子电池
Tao Xiao1, Jin-Lin Yang1, Bao Zhang1
1School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore.
Angewandte Chemie (International ed. in English)
|January 5, 2024
概括
离子液体EMIM[OAc]有效地溶解树突和聚化在水性-电池中的穿. 这提高了电池的周期寿命和稳定性,使其能够在最小容量衰减的情况下进行超过18,000个周期.
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
背景情况:
- 水性-电池 (ZIBs) 面临的挑战包括树状石的生长,腐蚀和聚酸的运输,这限制了它们的实际应用.
- 这些问题大大降低了电池寿命和性能.
研究的目的:
- 调查使用离子液体EMIM[OAc]作为改善ZIB性能的综合解决方案.
- 为了应对阳极和阴极的挑战.
主要方法:
- 使用EMIM[OAc]修改阳极接口,创建一个薄水内赫尔姆霍尔茨平面和一个惰性溶解.
- 使用EMIM[OAc]来抑制聚化溶解,并在阴极形成稳定的EMIM+-I3-阶段.
- 测试性能使用Zn下载Zn对称细胞和Zn-I2全细胞.
主要成果:
- 埃米米[OAc]有效地排斥阳极中的水,促进均的核和抑制树突的形成.
- 通过阻碍溶解,EMIM[OAc]减少了聚化的穿,从而提高了阴极的稳定性.
- 带有EMIM[OAc]的ZIB显示出超长周期寿命超过18,000个周期,低容量衰变率为每周期0.01‰.
- 与没有离子液添加剂的ZIB相比,提高了自放电和日历寿命.
结论:
- 离子液体EMIM[OAc]作为水性-电池的有效全方位添加剂.
- 通过解决关键的降解机制,EMIM[OAc]显著提高了电池的稳定性,循环寿命和整体性能.
- 这些发现为高性能和耐用ZIB的实际实施铺平了道路.
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