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低粘度溶剂辅助的不可燃性深层欧特克电解质增强Li/CF_x电池的热稳定性和能量密度

Gaoyu Zhou¹, Wenxuan Fu¹, Chencheng Xu¹

¹Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, China.

Small (Weinheim an der Bergstrasse, Germany)

|September 30, 2025

概括

一种新型的非易燃,低粘度的深度电解质 (DEE-DME) 提高了/碳 (Li/CFx) 电池的性能和安全性. 这种先进的电解质改善了离子运输和能量密度,解决了电池技术的关键局限性.

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:

深度环氧电解质 (DEE) 为更安全的电池提供不易燃性,但受到高粘度和较差离子传输的影响.
这限制了它们在/碳 (Li/CFx) 主电池等高性能系统中的应用,导致容量降低.
解决这些局限性对于提高电池安全性和性能至关重要.

研究的目的:

开发一种新型的非易燃,低粘度的深度电解质 (DEE-DME),以提高Li/CFx电池的性能.
调查N-甲基胺 (NMAC) 和二甲基乙 (DME) 在改善电解质特性和电化学行为的作用.
通过使用设计的电解质来证明Li/CFx电池的热稳定性,离子导电性和速率能力的提高.

主要方法:

使用N-甲基胺 (NMAC) 作为键捐赠剂和二甲基乙 (DME) 降低粘度的新型深度电解质 (DEE-DME) 的合成.
电解质性质的表征,包括粘度,离子导电性和Li+溶解结构.
使用DEE-DME对Li/CFx电池进行电化学测试,评估能量密度,速率能力和自放电特性.

主要成果:

该DEE-DME表现出内在的不易燃性,具有快速的自灭时间 (≈1s g-1).
由于调节的Li+溶解结构,提高了离子导电性 (13.03mS cm-1),改善了Li+运输动力学.
组装的Li/CFx电池表现出高能量密度 (961.2 Wh kg-1 在6000 mA g-1 时) 和在高温下低自放电.

结论:

开发的DEE-DME为内在安全和高性能Li/CFx电池提供了一个有前途的解决方案.
NMAC和DME的组合有效地克服了传统DEE的粘度和离子传输限制.
这项工作代表了电解质设计的重大进步,为更安全,更高效的储能应用提供了帮助.

关键词:

/CFx电池的使用情况深层欧特克斯电解质的使用.具有低粘度的低粘度不易燃的不易燃的较小的 LiF 颗粒.溶解结构是一个溶解结构.

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