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非易燃的化电解质实现了高压无阳极的 Zn 双离子电池
Kang Zhou1, Gaohong Liu1, Xiao Zhu1
1Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433, China.
Angewandte Chemie (International ed. in English)
|August 30, 2024
概括
这项研究引入了一种用于金属电池的新型电解质,使用化溶剂和添加剂,增强电化学稳定性和利用率. 新的电解质使得高性能电池具有更好的循环寿命和电压.
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:
- 水性金属电池由于水的低分解潜力和腐蚀性而面临局限性,限制了它们的电化学窗口和阳极利用.
- 含有低最高占成分子轨道 (HOMO) 能量水平的碳酸 Ester 对高压应用具有前景,但在电池中尚未得到充分探索.
研究的目的:
- 开发一种用于金属电池的新型电解质,克服水性电解质的局限性.
- 为了提高金属电池的电化学稳定性和性能,使用化溶剂和特定的添加剂.
主要方法:
- 使用化碳酸盐和乙氧化 (五) 环三 (PFPN) 添加剂制备一种新的电解质.
- 在 Zn//Zn, Zn//石墨双离子和无阳极电池中的电解质的电化学表征.
- 对阳极-电解质接口层形成的分析.
主要成果:
- 开发的电解质在电池中具有2.75V的高分解电压.
- 阳极上的独特的离子衍生的接口层促进了紧和平面沉积,在140小时内实现了91%的利用率.
- /石墨双离子电池证明了 1000 个循环的延长循环寿命.
- 无阳极电池在100个周期内稳定运行,平均高放电中点电压为1.84V.
结论:
- 拟议的电解质通过提高电化学稳定性和阳极利用率来提高金属电池的性能.
- 化溶剂和PFPN添加剂有助于形成一个强大的接口层,使高效的沉积和延长电池寿命.
- 这项工作为高压,稳定和持久的金属电池铺平了道路.
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