A Multilayer Ceramic Electrolyte for All-Solid-State Li Batteries

被引：88
|
作者：
Zhu, Jianxun [1 ]
Li, XiaoLei [1 ]
Wu, Changwei [1 ]
Gao, Jian [1 ]
Xu, Henghui [2 ,3 ]
Li, Yutao [2 ,3 ]
Guo, Xiangxin [4 ]
Li, Hong [5 ]
Zhou, Weidong [1 ]
机构：
[1] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China
[2] Univ Texas Austin, Sci & Engn Program, Austin, TX 78712 USA
[3] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA
[4] Qingdao Univ, Coll Phys, Qingdao 266071, Peoples R China
[5] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 07期
基金：
中国国家自然科学基金;
关键词：
interface; Li metal anode; mixed ion-electron conductors; multi-layer ceramic; solid state batteries; LITHIUM ION CONDUCTION; INTERFACIAL RESISTANCE; METAL ANODE; GARNET ELECTROLYTE; SURFACE-CHEMISTRY; INTERPHASE; DENDRITES; TITANIUM; CHALLENGES; MECHANISM;
D O I：
10.1002/anie.202014265
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Despite of the good stability with Li-metal, Li6.75La3Zr1.75Ta0.25O12(LLZTO) suffers from large interfacial resistance and severe Li-metal penetration. Herein, a dual layer ceramic electrolyte of Ti-doped LLZTO(Ti-LLZTO)/LLZTO was developed, with the reducible Ti-LLZTO layer contacting Li-metal and the LLZTO layer contacting cathode. The identical crystal structures of Ti-LLZTO and LLZTO enables a seamless contact and a barrierless Li+ transport between them. The densities of Ti-LLZTO pellets are higher than that of LLZTO. With an in situ reduction of Ti-LLZTO by Li-metal, the interfacial wettability was improved and a mixed ion-electron conducting layer was created. Both features help to reduce defects/pores on interface and homogenize the interfacial ionic/electronic flux, facilitating the reduction of interfacial resistance and suppression of dendrites. With the help of Ti-LLZTO layer, long-term stable lithium plating/stripping was reached in an areal capacity of 3.0 mAh cm(-2).
引用
收藏
页码：3781 / 3790
页数：10
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