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纳米沟超填充为高实际容量的固态电池提供嵌入式阳极

Chunli Shen¹, Mengyu Yan¹, Xiaobin Liao¹

¹State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, People's Republic of China.

|January 30, 2024

概括

研究人员使用性纳米沟开发了一种用于固态电解质的新型准3D介相. 这项创新提高了金属阳极稳定性和固态电池的性能,实现了高临界电流密度和可逆容量.

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:

固态电池 (SSB) 提供高能量密度和比传统离子电池更好的安全性.
金属阳极对于高能SSB至关重要,但由于与固态电解质 (SSE) 的接口降解而面临挑战.
金属和SSEs之间的快速接口降解导致高接口电阻,并限制了电池性能.

研究的目的:

为石榴基固态电池中的金属阳极开发稳定高性能接口.
为了减轻接口退化,并改善Li-SSE接口上的离子运输.
为了提高金属阳极的临界电流密度和循环稳定性.

主要方法:

在石榴石SSE上制造一个准3D介面,使用性纳米沟.
在创建的纳米沟中诱导金属超填充.
介面电阻和沉积/剥离行为的表征.
测试使用修改过的极的LiLiFePO4固态电池.

主要成果:

由于金属超填充到纳米沟中,实现了4 Ω cm2的低界面电阻.
扩展沉积/剥离到散装阳极 (∼10μm),增强稳定性.
在室温下实现了高临界电流密度1.8-2.0 mA cm−2.
在室温下,在Lithium-LiFePO4 SSB中显示出高可逆面积容量≥3.0 mAh cm−2.

结论:

拟议的准3D介面有效地稳定了金属阳极-SSE接口.
性纳米沟促进了统一的涂层和剥离,提高了电池性能.
这种方法为开发安全和高能量的固态电池提供了一个有前途的战略.

关键词:

嵌入式阳极阳极性纳米沟的性纳米沟.纳米沟的超级填充准3D相间阶段固态电池是一种固态电池.

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