Self assembled electron blocking and lithiophilic interface towards dendrite-free solid-state lithium battery  

作　　者：Caixia Li Yi Qiu Yufeng Zhao Wuliang Feng 

机构地区：[1]Institute for Sustainable Energy&College of Sciences,Shanghai University,Shanghai 200444,China [2]Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin 300071,China

出　　处：《Chinese Chemical Letters》2024年第4期220-225,共6页中国化学快报（英文版）

基　　金：supported by National Natural Science Youth Foundation of China (No.22209104);National Natural Science Foundation of China (No.22179077)。

摘　　要：The poor interfacial contact is one of the biggest challenges that solid-state lithium batteries suffer from.Reducing the solid-state electrolyte surface energy by transforming the interface from lithiophobic to lithiophilic is effective to promote the interfacial contact, but electronic conductive interphases usually increase the risk of electron attack, thus leading to uncontrollable Li dendrite growth. Herein, we propose a self-assembled thermodynamic stable Li I interphase to simultaneously improve the interfacial contact between the garnet electrolyte Li_7La_(3)Zr_(2)O_(12)(LLZO) and Li anode, and prohibit the electron attack. The direct contact between LLZO and Li and the high temperature Li melting process was ascribed to Zr4+reduction, which facilitated Li dendrite formation and propagation. With the modification of the high lithiophilic I_(2) thin film, the area specific interfacial resistance of LLZO/Li was reduced from 1525 Ω/cm^(2) to 57 Ω/cm^(2). More importantly, LLZO was protected from being reduced due to the outstanding electronic insulativity of the Li I interphase, which leaded to a high critical current density of 1.2/7.0 m A/cm^(2) in the time/capacity-constant modes, respectively.

关 键 词：Li_7La_(3)Zr_(2)O_(12) LiI interphase Interfacial contact Li dendrite Thermodynamic stable 

分 类 号：O646[理学—物理化学] TM912[理学—化学]