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潜在控制的SEI前规则,以提高无阳极固态金属电池中的可逆性

Qianwen Yin^1,2, Yuhao Duan^1,2, Jinlong Du¹

¹Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.

Advanced materials (Deerfield Beach, Fla.)

|June 9, 2025

概括

研究人员开发了一个SEI前层,以改进无阳极固态金属电池. 这一创新提高了Coulombic的效率和电池寿命,通过尽量减少运行期间的损耗.

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:

没有阳极的固态金属电池 (AF-SSLMB) 提供高安全性和能量密度.
由于不良的固体电解质接口 (SEI) 形成和不可逆转的 (Li) 沉积/溶解,低库伦比效率 (CE) 阻碍了AF-SSLMB的性能.

研究的目的:

制定SEI前策略,以减轻Li的损失,并改善AF-SSLMB中的Li沉积/溶解行为.
提高 AF-SSLMB 的库伦比克效率和循环稳定性.

主要方法:

一个预先SEI的工程使用一个潜在静电解质分解方法与乙氧-五-环三 (PFPN) 作为添加剂.
在0.5V的电位静态保持诱导PFPN和盐的同时分解,形成密集的,双层的前SEI.
使用前SEI和不使用前SEI的AF-SSLMB的性能被评估,使用的是LiidiyeCu细胞和CuidiyegaLFP袋细胞.

主要成果:

前SEI表现出高离子导电性,促进快速Li+运输,并抑制SEI形成期间的Li损失.
在Li水性Cu细胞中,初始高CE (ICE) 为95.5%,稳定的CE为98.7%,这代表了对控制的显著改进.
AF-SSLMB袋式电池的循环寿命延长了五倍,在100个循环后保持44.9%的容量保留.

结论:

前SEI策略有效地减少了与SEI形成和AF-SSLMB中化/脱落过程相关的损失.
这种方法提供了一种可扩展的方法,以提高高安全性,高能量密度的AF-SSLMB的库伦比克效率和周期寿命.

关键词:

没有阳极的无极管.现在的PFPN就是PFPN 潜在静态方法潜在静态方法关于SEI法规的规定固态金属电池固态金属电池

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