Well-contacted Li/LLZTO interface by citric acid aqueous treatment for solid-state Li metal batteries

Jie Gao; Weichang Guo; Yuting Yin; Zhouting Sun; Bin Zhao; Fei Shen; Xiaogang Han

doi:10.1016/j.matlet.2020.128543

Well-contacted Li/LLZTO interface by citric acid aqueous treatment for solid-state Li metal batteries

Jie Gao
, Weichang Guo
, Yuting Yin
, Zhouting Sun
, Bin Zhao
, Fei Shen
, Xiaogang Han

电气工程学院

Xi'an Jiaotong University
Shaanxi Key Laboratory of Smart Grid

科研成果: 期刊稿件 › 文章 › 同行评审

25 引用（Scopus）

摘要

Garnet-type Li_6.4La₃Zr_1.4Ta_0.6O₁₂ (LLZTO) is a competitive candidate among various solid-state electrolytes (SSEs) because of its high ionic conductivity and stability against Li metal. However, large Li/LLZTO interfacial resistance caused by poor contact due to the Li₂CO₃ contaminant on LLZTO hinders its practical application. Herein, a well-contacted Li/LLZTO interface was obtained via a simple and mild citric acid aqueous solution treatment. The Li₂CO₃-free interface after acid treatment shows an obvious decrease in interfacial resistance from 165 to 11.5 Ω cm². In addition, the Li symmetric cell with acid-treated electrolyte cycles stably over 300 h under 0.25 mA cm⁻² at 25 °C.

源语言	英语
文章编号	128543
期刊	Materials Letters
卷	280
DOI	https://doi.org/10.1016/j.matlet.2020.128543
出版状态	已出版 - 1 12月 2020

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10.1016/j.matlet.2020.128543

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@article{ad0c018ea572491abbea0202b27d3d0a,

title = "Well-contacted Li/LLZTO interface by citric acid aqueous treatment for solid-state Li metal batteries",

abstract = "Garnet-type Li6.4La3Zr1.4Ta0.6O12 (LLZTO) is a competitive candidate among various solid-state electrolytes (SSEs) because of its high ionic conductivity and stability against Li metal. However, large Li/LLZTO interfacial resistance caused by poor contact due to the Li2CO3 contaminant on LLZTO hinders its practical application. Herein, a well-contacted Li/LLZTO interface was obtained via a simple and mild citric acid aqueous solution treatment. The Li2CO3-free interface after acid treatment shows an obvious decrease in interfacial resistance from 165 to 11.5 Ω cm2. In addition, the Li symmetric cell with acid-treated electrolyte cycles stably over 300 h under 0.25 mA cm−2 at 25 °C.",

keywords = "Acid treatment, Contacts, Interfaces, LLZTO, LiCO",

author = "Jie Gao and Weichang Guo and Yuting Yin and Zhouting Sun and Bin Zhao and Fei Shen and Xiaogang Han",

note = "Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = dec,

day = "1",

doi = "10.1016/j.matlet.2020.128543",

language = "英语",

volume = "280",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Well-contacted Li/LLZTO interface by citric acid aqueous treatment for solid-state Li metal batteries

AU - Gao, Jie

AU - Guo, Weichang

AU - Yin, Yuting

AU - Sun, Zhouting

AU - Zhao, Bin

AU - Shen, Fei

AU - Han, Xiaogang

PY - 2020/12/1

Y1 - 2020/12/1

N2 - Garnet-type Li6.4La3Zr1.4Ta0.6O12 (LLZTO) is a competitive candidate among various solid-state electrolytes (SSEs) because of its high ionic conductivity and stability against Li metal. However, large Li/LLZTO interfacial resistance caused by poor contact due to the Li2CO3 contaminant on LLZTO hinders its practical application. Herein, a well-contacted Li/LLZTO interface was obtained via a simple and mild citric acid aqueous solution treatment. The Li2CO3-free interface after acid treatment shows an obvious decrease in interfacial resistance from 165 to 11.5 Ω cm2. In addition, the Li symmetric cell with acid-treated electrolyte cycles stably over 300 h under 0.25 mA cm−2 at 25 °C.

AB - Garnet-type Li6.4La3Zr1.4Ta0.6O12 (LLZTO) is a competitive candidate among various solid-state electrolytes (SSEs) because of its high ionic conductivity and stability against Li metal. However, large Li/LLZTO interfacial resistance caused by poor contact due to the Li2CO3 contaminant on LLZTO hinders its practical application. Herein, a well-contacted Li/LLZTO interface was obtained via a simple and mild citric acid aqueous solution treatment. The Li2CO3-free interface after acid treatment shows an obvious decrease in interfacial resistance from 165 to 11.5 Ω cm2. In addition, the Li symmetric cell with acid-treated electrolyte cycles stably over 300 h under 0.25 mA cm−2 at 25 °C.

KW - Acid treatment

KW - Contacts

KW - Interfaces

KW - LLZTO

KW - LiCO

UR - https://www.scopus.com/pages/publications/85089834747

U2 - 10.1016/j.matlet.2020.128543

DO - 10.1016/j.matlet.2020.128543

M3 - 文章

AN - SCOPUS:85089834747

SN - 0167-577X

VL - 280

JO - Materials Letters

JF - Materials Letters

M1 - 128543

ER -

Well-contacted Li/LLZTO interface by citric acid aqueous treatment for solid-state Li metal batteries

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