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Updated: Jun 2, 2025

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合理的电解质设计,用于高温和热稳定的离子电池与丰富的阴极

Hao Jia¹, Benjamin Broekhuis^1,2, Yaobin Xu³

¹Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States.

ACS applied materials & interfaces

|January 14, 2025

概括

新的局部高度电解质 (LHCE) 提高了离子电池 (LIB) 的安全性和周期寿命. 这些非易燃的LHCE提高了能量密度和性能,解决了先进电池设计中的关键问题.

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:

离子电池 (LIB) 的能量密度增加引发了人们对周期寿命缩短和安全危害的担忧.
开发先进的电解质对于下一代高能量密度LIBs至关重要.

研究的目的:

设计和评估新的局部高度电解质 (LHCEs),以提高LIB性能和安全性.
为了应对高能量密度LIBs中缩短周期寿命和安全问题所带来的挑战.

主要方法:

设计的LHCE使用溶解溶剂混合物 (四甲硫和三甲酸盐) 和高燃点稀释剂.
测试了LHCEs在石墨底管中的LiNi0.8Mn0.1Co0.1O2电池,以测试循环寿命和热稳定性.
进行了机制研究,以了解固体电解质间相 (SEI) 形成和阳极稳定性.

主要成果:

在高温下,LHCE 证明了不易燃性和抑制热释放.
在25°C和45°C的500个循环后,最佳的LHCE实现了87.1%和81.7%的容量保留.
与传统电解质相比,LHCEs形成了更强大的SEI,并表现出更好的阳极稳定性.

结论:

高能量密度LIB提供了一个有前途的解决方案,以提高高能量密度LIB的安全性和循环寿命.
合理的电解质设计是实现高电池性能与降低安全问题的关键.
这些发现为更安全,更持久的高级LIB铺平了道路.

关键词:

年龄化机制的衰老机制.电池安全电池安全离子电池是一种离子电池.局部化的高度电解质电解质热稳定性的热稳定性

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