Impact of Surface Coating on the Low Temperature Performance of a Sulfide-Based All-Solid-State Battery Cathode
Impact of Surface Coating on the Low Temperature Performance of a Sulfide-Based All-Solid-State Battery Cathode
复制标题
表面涂层对硫化物基全固态电池正极低温性能的影响
DOI：
10.5796/electrochemistry.21-00126
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发表时间：
2021
期刊：
影响因子：
2.5
通讯作者：
Y. Morino
中科院分区：
文献类型：
--
作者：
Y. Morino
阴极涂层是硫基全固态电池（ASSB）的关键技术。涂层作为保护层，抑制硫化物/阴极活性材料界面的副反应。铌酸锂（LiNbO 3）是一种众所周知的涂层材料。在这项研究中，未涂覆和表面涂覆LiNbO 3的硫化物基ASSB在低温环境（即，− 60°C），其中商用液体型锂离子电池（LIB）由于部分冻结和粘度显著增加而无法运行。与液体型LIB不同，涂层和未涂层ASSB在− 60°C下成功放电，强调了它们在低温环境中的适用性。涂层ASSB比未涂层ASSB具有更好的低温性能。在没有涂层的情况下，去卷积的EIS电阻数据显示在低温下一些电阻分量增加。
Cathode coating is a key technology in sul fi de-based all-solid-state batteries (ASSBs). The coating serves as a protector, suppressing side reactions at the sul fi de/cathode active material interface. Lithium niobate (LiNbO 3 ) is a well-known coating material. In this study, sul fi de-based ASSBs, which were uncoated and surface-coated with LiNbO 3 , are subjected to cell operation testing and electrochemical impedance spectroscopy (EIS) in a low-temperature environment (i.e., − 60°C), where a commercial liquid-type lithium-ion battery (LIB) is unable to operate because of partial freezing and signi fi cant viscosity increase. Unlike liquid-type LIBs, the coated and uncoated ASSBs successfully discharge at − 60°C, emphasizing their applicability in low-temperature environments. The coated ASSB exhibits better low-temperature performance than the uncoated one. In the absence of coating, the deconvoluted EIS resistance data show an increase in some resistance components at low temperature.