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压电介层使可充电的近固态电池在0°C时能够充电

Qing Ni¹, Yu Ding^1,2, Chengzhi Wang^1,2

¹School of Materials Science and Engineering, Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China.

Advanced materials (Deerfield Beach, Fla.)

|December 26, 2023

概括

本研究引入了固态电池 (SSNB) 的压电介层,以克服接口电阻和状物问题. ZnO中间层显著改善涂层和循环稳定性,特别是在低温下.

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
固态电池固态电池是什么

背景情况:

固态电池 (SSNBs) 提供高安全性和能量密度,但面临的挑战是界面电阻和树的生长.
固体电解质/电极接口对于SSNB性能至关重要,高电阻阻碍离子传输和均.
开发有效的中间层对于实现稳定和高效的SSNB运行至关重要.

研究的目的:

建议和研究用于SSNB中的Na3Zr2Si2PO12 (NZSP) 固体电解质的压电介层设计.
解决SSNB中的高界面电阻和树生长问题.
为了提高SSNB的低温性能和循环稳定性.

主要方法:

用压电膜 (AlN和ZnO) 覆盖NZSP固体电解质,以创建间层.
描述介质层产生应力诱导电场的能力,以实现均的涂层.
在不同温度 (0°C和30°C) 下测量界面电阻和电化学性能 (/剥离周期,全电池容量).

主要成果:

ZnO中间层显示出匹配的模量,高的Na粘合力和足够的压电性,创造了有利的间相.
用ZnO中间层实现了显著降低的91 Ω cm2 (30 °C) 和239 Ω cm2 (0 °C) 的界面电阻.
观察到稳定的涂/剥离周期超过850小时 (0°C) 和4900小时 (30°C).
使用ZnO中间层的全细胞在0°C和30°C都表现出极好的循环稳定性.

结论:

压电介层,特别是ZnO,在缓解SSNB的接口问题方面是有效的.
拟议的间层设计成功地促进了统一的涂层,并提高了循环稳定性.
这种方法为克服固态电池的低温限制提供了一个有希望的策略.

关键词:

接口电阻的介面电阻.压电介层是压电介层.金属树石是一种金属树石.固态电池是一种固态电池.

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