在分子尺度上混合碳酸盐和以太,用于高能量和高安全性金属电池
Jiawei Chen1, Daoming Zhang2, Lei 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.
一种新型的二二甲基乙基碳酸盐 (BMC) 电解质使得更安全,高能金属电池成为可能. 这种功能化溶剂结合了以太和碳酸盐的好处,改善了先进的能量存储的稳定性和性能.
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:
- 以太电解质与金属阳极卓越,而碳酸盐电解质则适用于高压阴极.
- 这些电解质的物理混合并不能充分利用它们的互补性质来制造先进的金属电池.
研究的目的:
- 通过分子内混合以太和碳酸功能来开发一种新的单溶剂电解质.
- 为了研究 bis(2-甲乙烯) 碳酸盐 (BMC) 的性能和性能,用于高能金属电池.
主要方法:
- 通过整合以太和碳酸盐组合成二二甲基乙基碳酸盐 (BMC).
- 电解质特征,包括氧化/还原稳定性,溶解能力和LiNO3溶解.
- 在金属电池中测试基于BMC的电解质的电化学测试,评估高压耐受性和涂/脱落效率.
主要成果:
- BMC表现出平衡的电荷分布,导致显著的氧化/还原稳定性和弱溶解.
- 该BMC电解质表现出高电压耐受性 (4.4V) 和优异的涂/剥离库伦比克效率 (99.4%).
- 使用BMC电解质的电池显示出令人满意的循环性能和对热/机械应力的增强耐受性.
结论:
- 乙二甲基乙烯碳酸盐 (BMC) 是一种有前途的单溶剂电解质,用于安全的高能金属电池.
- BMC的独特分子结构促进了以太和碳酸盐电解质的协同效益.
- 基于BMC的电解质为开发下一代储能解决方案提供了可行的途径.
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