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在碳酸盐基凝聚合物电解质中的1,3,2-二氧化添加剂可实现高性能长循环金属电池的双接口稳定

Qiujun Wang¹, Yelun Xin¹, Gaofeng An¹

¹Hebei Key Laboratory of Flexible Functional Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, China.

Journal of colloid and interface science

|August 30, 2025

概括

该研究使用分子工程方法开发了用于金属电池的新型凝聚合物电解质. 新的电解质增强了稳定性和离子导电性,使得超长循环性能和高容量保留.

科学领域:

材料科学
电化学
能量储存

背景情况:

金属电池 (SMB) 具有较高的理论容量,但存在不稳定的固体电解质间相 (SEI) 形成和寄生反应.
不同质的沉积导致SEI恶化,限制了SMB的实际应用.

研究的目的:

设计一种新型碳酸基聚合物电解质 (GPE),以提高中小企业的界面稳定性和离子传输.
调查 1,3,2-二氧化二 (DTD) 作为优化溶解结构和SEI形成的功能添加剂的作用.

主要方法:

在现场进行热聚合,以合成THEP GPE系统 (TMPTMA,HDDA,EMC,PC).
加入DTD作为功能添加剂,以修改溶解和界面特性.
电解质导电率的电化学表征,NavigationTHEP-D5VigationNa对称细胞,和Na3V2(PO4)3 (NVP) 的NavigationTHEP-D5VigationNa全细胞.

主要成果:

优化的THEP-D5电解质具有4.26×10−3 S cm−1的高离子导电性.
在0.1 mA cm−2下,NADHEP-D5ADHNA对称细胞表现为稳定的循环运行1500小时.
在2000个循环后,NVPadderTHEP-D5adderNa电池在1°C下保持了82%的容量,在5°C下保持了83%.

结论:

DTD添加剂有效地优化了溶解,并促进了稳定的SEI形成,这对中小企业的业绩至关重要.
开发的GPE系统为推进安全和耐用的金属电池提供了有前途的途径.
这项工作为下一代能源存储提供了调节溶解化学和界面动态的基本见解.

关键词:

1,3,2-二氧二氧化物碳酸盐基凝聚合物电解质双接口稳定长时间循环金属电池

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