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在现场渐变聚合和相位分离之间的协同作用使实用固态离子电池成为可能

Hao Zhang^1,2,3,4, Yalan Zhang^1,2,3,5, Xiaofan Du^1,2,3

¹Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|July 21, 2025

概括

这项研究引入了一种新的固体聚合物电解质 (SPE),用于更安全,高能离子电池. 新的SPE增强了离子导电性和稳定性,在高负载电池应用中提高了性能.

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
聚合物化学聚合物化学

背景情况:

固体聚合物电解质 (SPEs) 提供了安全优势,但与低离子导电性和有限的阳极稳定性作斗争,阻碍了它们与高压阴极的使用.
现有的SPE与高负荷和高压阴极材料不兼容.

研究的目的:

为高负载,高压离子电池开发一种具有增强离子导电性和阳极稳定的新型SPE.
为了提高离子电池的安全性和能量密度.

主要方法:

在现场的梯度聚合深度解电解质,以创建一个SPE.
聚合诱导的花状相分离结构的制造,以增强界面离子传输.
组装和测试NCM811手持式石墨全电池和NCM811手持式SiOx袋式电池.

主要成果:

实现了室温离子导电率为1.5 × 10−3 S cm−1.1.
高负载 (19.5毫克/厘米-2) NCM811红色白色石墨完整电池在200个循环后显示了85.3%的容量保留和出色的速率性能.
一个1.2Ah的NCM811下载的SiOx袋式电池显示能量密度为382Wh kg-1.1.
通过延迟热释放开始 (266 °C) 和热失控 (312 °C) 提高了安全性.

结论:

开发的SPE表现出与高负载的丰富阴极的卓越兼容性.
这项工作为开发高能量密度和更安全的离子电池提供了实用方法.
新的SPE结构显著改善了界面离子传输和电池性能.

关键词:

深层欧特克溶剂溶剂的使用在现场的梯度聚合物化.离子电池的离子电池阶段分离的阶段分离.固体聚合物电解质的电解质.

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