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终端化以太作为高性能金属电池电解质溶剂

Alexander A Hizbullin¹, Irina V Kutovaya¹, Gayane A Kirakosyan^2,3

¹Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Blvd. 30 build. 1, 121205, Moscow, Russia. o.shmatova@skoltech.ru.

Chemical communications (Cambridge, England)

|January 16, 2025

概括

一种含有5FDEE (终端化) 和LiPF6的新型电解质使高性能金属电池成为可能. 这种配方证明了用于先进的储能应用的特殊循环稳定性和效率.

科学领域:

电化学和材料科学材料科学
先进的电池技术电池技术

背景情况:

金属电池 (LMB) 提供高能量密度,但在电解质稳定性和循环性能方面面临挑战.
开发兼容的电解质对于实现LMB的全部潜力至关重要,特别是在下一代能源存储方面.

研究的目的:

研究一种基于终端化以太 (5FDEE) 的新型电解质的性能,用于高性能金属电池.
评估5FDEE与六酸 (LiPF6) 的兼容性及其对Li‖NMC811细胞稳定性的影响.

主要方法:

电解质配方:在5FDEE:FEC (9:1v/v) 中制备了一种1M LiPF6的混合物.
电化学测试:组装了Li‖NMC811电池,并在电压窗口内进行了长期循环测试,电压窗口为2.7-4.3V与Li+/Li.

主要成果:

基于5FDEE的电解质与LiPF6表现出极好的兼容性,促进了高性能LMBs.
NMC811细胞表现出了显著的循环稳定性,保持了超过99.9%的平均库伦比效率.
在550个循环中没有观察到容量衰减,这表明长期耐用性很好.

结论:

终端化以太 (5FDEE) 是先进的金属电池的一个有前途的电解质成分.
开发的电解质配方显著提高了循环稳定性和效率,为实际的LMB应用铺平了道路.

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