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

Tan Tan Bui; Boseon Yun; Kwabena Darko; Seung Beom Shin; Jaehyun Kim; Jongin Hong; Minah Lee; Sung Kyu Park; Myung Gil Kim

doi:10.1002/admi.202001767

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

Tan Tan Bui, Boseon Yun, Kwabena Darko, Seung Beom Shin, Jaehyun Kim, Jongin Hong, Minah Lee, Sung Kyu Park, Myung Gil Kim

Division of System Semiconductor

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

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 × 10⁻⁸ S cm⁻¹ (Li₈La₂Zr₂O₁₁) to 1.18 × 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 LiNi_0.8Mn_0.1Co_0.1O₂ (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.

Original language	English
Article number	2001767
Journal	Advanced Materials Interfaces
Volume	8
Issue number	5
DOIs	https://doi.org/10.1002/admi.202001767
State	Published - 9 Mar 2021

Keywords

a-Li-La-Zr-O
amorphous ion-conducting layers
cathode coatings
lithium-ion batteries
solution processing

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/admi.202001767

Cite this

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title = "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",

abstract = "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 × 10−8 S cm−1 (Li8La2Zr2O11) to 1.18 × 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.",

keywords = "a-Li-La-Zr-O, amorphous ion-conducting layers, cathode coatings, lithium-ion batteries, solution processing",

author = "Bui, {Tan Tan} and Boseon Yun and Kwabena Darko and Shin, {Seung Beom} and Jaehyun Kim and Jongin Hong and Minah Lee and Park, {Sung Kyu} and Kim, {Myung Gil}",

note = "Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",

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T1 - 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

AU - Bui, Tan Tan

AU - Yun, Boseon

AU - Darko, Kwabena

AU - Shin, Seung Beom

AU - Kim, Jaehyun

AU - Hong, Jongin

AU - Lee, Minah

AU - Park, Sung Kyu

AU - Kim, Myung Gil

PY - 2021/3/9

Y1 - 2021/3/9

N2 - 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 × 10−8 S cm−1 (Li8La2Zr2O11) to 1.18 × 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.

AB - 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 × 10−8 S cm−1 (Li8La2Zr2O11) to 1.18 × 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.

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