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Updated: Jun 4, 2025

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Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
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由和离子之间的"Z键"诱导的协同效应实现了高度可逆的阳极
Maojun Zhou1, Kun Zhang2, Li Gong3
1School of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, PR China; Zhejiang Provincial Engineering Research Center of Oxide Semiconductors for Environmental and Optoelectronic Applications, Institute of Wenzhou, Zhejiang University, Wenzhou 325006, PR China.
Journal of colloid and interface science
|December 26, 2024
概括
离子液体添加剂通过调节电气双层来防止水性离子电池中的树生长. 这提高了电池的稳定性和性能,为离子电池提供了一个有希望的替代品.
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:
- 水性离子电池 (AZIB) 由于其高能量密度,低成本和环境效益而具有吸引力.
- 对于AZIBs来说,关键的挑战包括树的形成和涉及水分子的寄生反应.
- 这些问题阻碍了AZIBs的实际应用和长期稳定性.
研究的目的:
- 为AZIBs引入一种离子液添加剂,1-基-3-甲基利米达 Bis(fluorosulfonyl) imide (BMImFSI),用于AZIBs.
- 研究BMImFSI调节Zn阳极的电双层 (EDL) 的机制.
- 为了证明抑制树生长和寄生反应,以提高电池性能.
主要方法:
- 将BMImFSI添加到一个ZnSO4电解质中.
- Zn‖Zn对称细胞和 Zn‖Cu不对称细胞的电化学表征.
- 分析固体电解质介相 (SEI) 的形成和结构.
主要成果:
- BMImFSI 在 Zn 阳极上形成一个缺水的 EDL,抑制副作用.
- BMIm+和分解的FSI-的协同作用产生了矿化SEI和离子分散层,促进了均的Zn沉积.
- Zn‖Zn对称电池在10 mA cm−2下实现了1060小时的稳定运行,在20 mA cm−2下实现了560小时的稳定运行.
- 不对称的Zn‖Cu细胞在1000个循环中显示了99.4%的平均库伦比效率.
- 带有α-MnO2阴极的全细胞显著改善了容量保留.
结论:
- 在AZIBs中,BMImFSI有效地抑制了树的生长和寄生虫反应.
- 离子液体添加剂增强了AZIBs的稳定性和循环性能.
- 经过BMImFSI修改的AZIB显示出作为离子电池的可行替代品的潜力.
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