非化循环以太基电解质,具有准结合效应,用于高性能金属电池
Xiao Zhu1, Jiawei Chen1, Gaopan Liu1
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 29, 2024
概括
一种新的非化电解质通过使用 methoxy-functionalized 循环以太来提高金属电池的性能. 这种设计改善了Li+的溶解,使稳定的循环和广泛的温度操作成为先进的能量存储.
科学领域:
- 电化学和材料科学 材料科学
- 储能技术 储能技术是一种储能技术.
- 电池化学 电池化学
背景情况:
- 化以太电解质是金属电池 (LMB) 中的标准,用于稳定的相间形成.
- 化带来了诸多挑战,包括高成本和环境问题.
- 需要采用替代策略来实现高性能LMB,而不依赖化化合物.
研究的目的:
- 为金属电池开发一种非化电解质.
- 为了研究一个分子设计策略,使用甲基组调整Li+-溶剂相互作用.
- 为了评价LiidiyeLiFePO4全细胞中的新型电解质在广泛的温度范围内的性能.
主要方法:
- 概念化了一种非化分子设计策略,将甲基组纳入循环以太溶剂中.
- 合成并优化了2-甲基-1,3-二索兰电解质.
- 制造并测试了Li的原材料LiFePO4全电池,评估了Li/剥离效率,循环稳定性和在不同温度下的性能.
主要成果:
- 优化的电解质表现出一种阳离子主导的溶解结构,导致一种富含无机物的间相.
- 取得了令人印象深刻的涂/剥离库伦比克效率99.6%.
- 完整细胞表现出高容量保留 (83%在150个循环后) 和在-20°C至60°C之间表现出色 (在110个循环后在-20°C时90%的保留).
结论:
- 使用2-甲基-1,3-二氧化的非化分子设计策略为化电解质提供了可行的替代方案.
- 这种方法使弱+溶解成为可能,促进稳定的无机界面,并确保了优异的电化学性能.
- 开发的电解质显示出对高性能,成本效益和更环保的金属电池具有重大承诺.
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