Solution Processing of Lithium-Rich Amorphous Li-La-Zr-O Ion Conductor and Its Application for Cycling Durability Improvement of LiCoO2 Cathode as Coating Layer

被引：13

作者：

Bui, Tan Tan ^{[1
]}

Yun, Boseon ^{[2
]}

Darko, Kwabena ^{[1
]}

Shin, Seung Beom ^{[3
]}

Kim, Jaehyun ^{[4
]}

Hong, Jongin ^{[2
]}

Lee, Minah ^{[5
]}

Park, Sung Kyu ^{[3
]}

Kim, Myung-Gil ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea

[2] Chung Ang Univ, Dept Chem, Seoul 06974, South Korea

[3] Chung Ang Univ, Sch Elect & Elect Engn, Seoul 06974, South Korea

[4] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[5] Korea Inst Sci & Technol KIST, Ctr Energy Storage Res, Seoul 02792, South Korea

来源：

ADVANCED MATERIALS INTERFACES | 2021年 / 8卷 / 05期

关键词：

a-Li-La-Zr-O; amorphous ion-conducting layers; cathode coatings; lithium-ion batteries; solution processing; SOLID-STATE ELECTROLYTES; GARNET-TYPE LI7LA3ZR2O12; ELECTROCHEMICAL PERFORMANCE; SURFACE-CHEMISTRY; PARTICLE-SIZE; THIN-FILMS; BATTERIES; STABILITY; PROGRESS; ORIGIN;

D O I：

10.1002/admi.202001767

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Lithium-rich amorphous Li-La-Zr-O (a-Li-La-Zr-O) electrolyte is successfully synthesized using sol-gel processing method. With unlimited compositions of the amorphous structure, lithium-rich compositions are systematically investigated to determine optimal composition and optimized processing conditions of a-Li-La-Zr-O coatings. There is an improvement in ionic conductivity of a-Li-La-Zr-O with Li content increasing, specifically from 3.0 x 10(-8) S cm(-1) (Li8La2Zr2O11) to 1.18 x 10(-6) S cm(-1) (Li18La2Zr2O16), thereby resulting in low activation energy. The high-ionic-conductivity a-Li-La-Zr-O is implemented as an artificial solid electrolyte interface coating layer on cathode materials. The a-Li-La-Zr-O-coated LiCoO2 (LCO) and LiNi0.8Mn0.1Co0.1O2 (NMC 811) coin cells exhibit better cycling performance than the bare coin cell at the optimum compositional ratio of a-Li-La-Zr-O. A-Li-La-Zr-O can be a promising material for solid electrolyte battery and a potential coating layer for the modification of cathode surface.

引用

页数：10

共 61 条

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