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五伏电池与先进的碳酸盐基电解质:通过三功能添加材料的合理设计

Fuming Zhang^1,2, Peng Zhang³, Wenhua Zhang⁴

¹Department of Materials Science and Engineering, Guangdong Technion-Israel Institute of Technology, 241 Daxue Road, Shantou, 515063, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|September 9, 2024

概括

带有三功能添加剂的先进电解质增强了金属电池. 这提高了高压,,氧化物 (LNMO) 电池的稳定性和性能,在500个循环后实现了88.3%的容量保留.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

高压,,氧化物 (LNMO) 阴极对于高能量密度电池至关重要.
持久的固体电解质界面 (SEI) 和阴极电解质界面 (CEI) 对于电池的寿命至关重要.
高电位的氧化稳定性是先进电解质的一个关键挑战.

研究的目的:

为5V电池和石墨电池设计先进的电解质.
为了提高金属电池的稳定性和性能,使用新的电解质添加剂.
了解电解质添加剂在提高电池性能方面的机制.

主要方法:

在碳酸盐基电解质中使用三功能添加剂开发先进的电解质.
电化学测试LNMO和石墨LNMO电池的电化学测试.
理论计算 (DFT) 阐明了添加剂在离子溶解和脱溶中的作用.
低温传输电子显微镜 (Cryo-TEM) 和同步子研究,以分析接口结构.

主要成果:

在LNMO电池和石墨LNMO电池中,在500个充放电周期后实现了88.3%的容量保留.
理论计算显示,由于等级化的DFOB和PF6双离子结构,增强了Li+脱溶.
和酸添加剂的协同作用形成了坚固的无机SEI和CEI薄膜.
抑制了树的生长,并减轻了从阴极中的过渡金属溶解.

结论:

三重功能添加剂创建稳定的SEI和CEI层,对于高压LNMO电池至关重要.
设计的电解质显著提高了金属电池的循环寿命和稳定性.
添加剂的协同效应为下一代高能量密度电池提供了一个有希望的战略.

关键词:

5伏的操作操作操作.离子电池是一种离子电池.金属的是金属的电解质设计电解质设计具有高潜力的高潜力

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