Stable zero-sodium-excess solid-state batteries enabled by interphase stratification  

作　　者：Ruixiao Wang Wuliang Feng Xuan Yu Qinhao Shi Peiyao Wang Yiming Liu Jiujun Zhang Yufeng Zhao 

机构地区：[1]College of Science&Institute for Sustainable Energy,Shanghai University,Shanghai 200444,China [2]College of Materials Science and Engineering,Fuzhou University,Fuzhou 350108,China

出　　处：《eScience》2024年第6期88-95,共8页电化学与能源科学(英文)

基　　金：supported by National Natural Science Youth Foundation of China(Grant Nos.22209104);National Natural Science Foundation of China(Grant Nos.22179077);Shanghai Science and Technology Commission's“2020 Science and Technology In-novation Action Plan”(20511104003);Natural Science Foundation in Shanghai(21ZR1424200);Shanghai Technical Service Center of Science and Engineering Computing,Shanghai University.

摘　　要：Zero-sodium-excess solid-state batteries(ZSBs)are promising to overcome the disadvantage of low energy density for Na-ion batteries,but the interfacial issues between the solid-state electrolytes and current collectors remain bottlenecks for their practical applications.Herein,we report a self-regulated stratification of the artificial interphase through the conversion reaction between MgF_(2) modification layer and Na metal.Ascribed to the huge adsorption energy difference between Al-Mg and Al-NaF,the sodiophilic Mg concentrated at the bottom side and served as the nucleophilic seed for Na,while sodiophobic NaF on the top side provided high thermodynamic stability for Na dendrite and side reaction suppressions.Consequently,the as constructed ZSBs with Na_(3)V_(2)(PO_(4))_(3) cathode exhibited prominent energy density of 254.4 Wh kg^(-1)(calculated based on the total mass of electrode and electrolyte)with a capacity retention of 82.7% over 350 cycles.This work paves a feasible way to achieve high performance and stable ZSBs.

关 键 词：Zero-sodium-excess Solid-state batteries Sodium dendrites STRATIFICATION 

分 类 号：TM9[电气工程—电力电子与电力传动]