文献类型：期刊文献

英文题名：Stabilizing Na3Zr2Si2PO12/Na Interfacial Performance by Introducing a Clean and Na-Deficient Surface

作者：Gao, Zhonghui[2];Yang, Jiayi[3];Yuan, Haiyang[4];Fu, Haoyu[2];Li, Yutao[5,6];Li, Yuyu[3];Ferber, Thimo[1];Guhl, Conrad[1];Sun, Huabin[2];Jaegermann, Wolfram[1];Hausbrand, Rene[1];Huang, Yunhui[2,3]

机构：[1]Tech Univ Darmstadt, Surface Sci Div, Mat Sci Dept, D-64287 Darmstadt, Germany;[2]Tongji Univ, Shanghai Key Lab D&A Met Funct Mat, Sch Mat Sci & Engn, Shanghai 201804, Peoples R China;[3]Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Hubei, Peoples R China;[4]East China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[5]Univ Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA;[6]Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA

年份：2020

卷号：32

期号：9

起止页码：3970

外文期刊名：CHEMISTRY OF MATERIALS

收录：;EI(收录号：20205209673102);WOS:【SCI-EXPANDED(收录号:WOS:000535241800032)】；

基金：This work is supported by the National Natural Science Foundation of China (no. 51632001) and the National Key R&D Program of China (no. 2018YFB0905400).

语种：英文

外文关键词：Sodium - Density functional theory - Ions - Wetting - Zirconium compounds - Silicon - Passivation - Sodium compounds - Silicon compounds - Anodes

摘要：Most Li+/Na+-conducting solid electrolytes are unstable in moisture, and the formed hydroxides and carbonates on their surfaces result in the increase of the interfacial resistance between solid electrolytes and alkali metal anodes. In this study, heat treatment was used to remove the byproduct coating on the surface of Na3Zr2Si2PO12 (NZSP) that also leads to the generation of Na-ion deficient surface simultaneously. This surface chemistry approach was used to reduce the interfacial resistance and suppress Na-dendrite growth during Na plating. A combination of the metallic Na wetting test, density functional theory, and electrochemical measurement was employed to investigate the origins of ultralow interfacial resistance and mechanism between the Na-ion deficient surface and the metallic Na anode. The analysis demonstrates that the Na-ion-deficient surface effectively improves the contact between NZSP and the metallic Na anode. Moreover, an ultrathin passivating layer involving Na2O was formed between NZSP with metallic Na that protected the NZSP electrolyte from the reduction by metallic Na. This study not only motivates the need for further understanding of the surface chemistry of NZSP but also provides guidelines for the future design of the Na-ion solid-electrolyte interface.