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为电池设计NASICON电解质/Na阳极接口与无形 bismuth 氧化物

Jinze Wu^1,2, Hui Liu^1,2, Yongdan Li^1,2,3

¹State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China. cjzhang@tju.edu.cn.

Chemical communications (Cambridge, England)

|July 3, 2023

概括

在NASICON电解质上的无形 bismuth oxide 涂层增强了电池的阳极接口特性. 这使得对称细胞的循环稳定,提高了电池的性能和寿命.

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
固态化学固态化学

背景情况:

接口电阻是固态电池的一个主要挑战.
无形材料可以为固体电解质介面相提供独特的特性.
纳西康 (超离子导体) 电解质对离子应用具有前景.

研究的目的:

为了研究无形 bismuth 氧化物对阳极-电解质接口的影响.
为了评估NASICON电解质的电化学性能,这些电解质用无形 bismuth 氧化物修饰.
评估对称细胞的界面稳定性和循环性能.

主要方法:

光化学金属有机沉积 (PMOD) 用于在NASICON上制备无形BiO涂层.
对称电池 (NASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASICONNASONNASONNASICONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASONNASON
进行了电化学阻抗光谱 (EIS) 和静电循环,以评估接口特性和稳定性.

主要成果:

无形BiO涂层显著改善了阳极侧的接口特性.
修改后的Na对称细胞实现了1.2 mA cm-2的临界电流密度.
在0.5 mA cm^-2下稳定循环在30°C下1000小时被证明.

结论:

无形BiO涂层有效地降低了基于NASICON的电池的界面电阻.
PMOD方法为固体电解质的界面工程提供了一个可行的途径.
改进的界面特性转化为在对称细胞中增强的循环稳定性和性能.

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