涂层
聚丙烯酸
阴极
电解质
材料科学
快离子导体
电化学
化学工程
锂(药物)
电导率
钠
复合材料
聚合物
化学
电极
冶金
物理化学
工程类
医学
内分泌学
作者
Dohyub Park,Minsu Choi,Minjun Kim,Jun‐Ho Park,Hyung‐Seok Kim,Wonchang Choi
出处
期刊:Applied Energy
[Elsevier]
日期:2023-07-28
卷期号:349: 121639-121639
被引量:6
标识
DOI:10.1016/j.apenergy.2023.121639
摘要
Sodium has the advantage of being more abundant than lithium. Therefore, sodium-ion batteries (SIB) have attracted attention as next-generation secondary batteries to replace lithium-ion batteries (LIB). NaNixFeyMnzO2 (x + y + z = 1), an O3-type sodium-based layered cathode material, is considered a promising cathode material because sodium can occupy a significant portion of the O3-type structure. However, the rate capability, cycle life, and capacity reduction are obstacles to actual application because of the low Na-ion conductivity caused by the O3-type sodium structure characteristics and inherent moisture vulnerability. In this study, a simple ethanol-based precursor pre-coating process using a fast Na-ion conductive material was designed to effectively improve the electrochemical performance of the cathode material. Na3Zr2Si2PO12 with a NASICON structure, a high-ion-conductivity phosphate-based solid electrolyte, was used as the coating material. In addition, a uniform coating layer was formed on the surface of the cathode using polyacrylic acid, a polymer material with a driving force for the coating precursor.
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