Dependences of ionic conductivity and activation energy on germanium content in superionic Li1.4Al0.4GexTi(1.6−x)(PO4)3 solid electrolytes

Jiyeon Baek; Baeksang Yoon; Hyeonwoo Jeong; Junho Jeong; Suresh Mamidi; Hyung Kee Seo; Cheul Ro Lee; Inseok Seo

doi:10.1016/j.jelechem.2022.116631

Dependences of ionic conductivity and activation energy on germanium content in superionic Li_1.4Al_0.4Ge_xTi_(1.6−x)(PO₄)₃ solid electrolytes

Jiyeon Baek
, Baeksang Yoon
, Hyeonwoo Jeong
, Junho Jeong
, Suresh Mamidi
, Hyung Kee Seo
, Cheul Ro Lee
, Inseok Seo^*

^*Corresponding author for this work

Jeonbuk National University

Research output: Contribution to journal › Journal article › peer-review

8 Scopus citations

Abstract

Herein, to improve the ionic conductivities of Li_1.4Al_0.4Ti_1.6(PO₄)₃ (LATP) solid-state electrolytes and establish the optimal Ge content to yield a high lithium-ion conductivity, Ti⁴⁺ is partially substituted with Ge⁴⁺ to yield Li_1.4Al_0.4Ge_xTi_(1.6−x)(PO₄)₃ (LAGTP, x = 0.1, 0.2, 0.3, and 0.4). The LAGTP solid electrolytes are synthesized using a facile solution-based method. Further, the obtained material is calcined and sintered at 800 and 900 °C, respectively. The structural properties of the LAGTP ceramic powders are thoroughly investigated, and the dependences of the ionic conductivity and activation energy on Ge content are also explored. The LAGTP (x = 0.1) solid electrolyte exhibits the highest total ionic conductivity (1.05 × 10^–3 S/cm) at 25 °C and the lowest activation energy (0.237 eV), which are far superior to those of the conventional LATP solid electrolytes. Therefore, LAGTP solid electrolytes are potential candidates for use in developing safer high-performance all-solid-state batteries.

Original language	English
Article number	116631
Journal	Journal of Electroanalytical Chemistry
Volume	920
DOIs	https://doi.org/10.1016/j.jelechem.2022.116631
State	Published - 2022.09.1

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Activation energy
Ionic conductivity
LAGTP
Sodium superionic conductor
Solid electrolyte
Solution-based method

Quacquarelli Symonds(QS) Subject Topics

Engineering - Chemical
Chemistry

Access to Document

10.1016/j.jelechem.2022.116631

Cite this

@article{6d53654fefe140d997a587edbdb484e9,

title = "Dependences of ionic conductivity and activation energy on germanium content in superionic Li1.4Al0.4GexTi(1.6−x)(PO4)3 solid electrolytes",

abstract = "Herein, to improve the ionic conductivities of Li1.4Al0.4Ti1.6(PO4)3 (LATP) solid-state electrolytes and establish the optimal Ge content to yield a high lithium-ion conductivity, Ti4+ is partially substituted with Ge4+ to yield Li1.4Al0.4GexTi(1.6−x)(PO4)3 (LAGTP, x = 0.1, 0.2, 0.3, and 0.4). The LAGTP solid electrolytes are synthesized using a facile solution-based method. Further, the obtained material is calcined and sintered at 800 and 900 °C, respectively. The structural properties of the LAGTP ceramic powders are thoroughly investigated, and the dependences of the ionic conductivity and activation energy on Ge content are also explored. The LAGTP (x = 0.1) solid electrolyte exhibits the highest total ionic conductivity (1.05 × 10–3 S/cm) at 25 °C and the lowest activation energy (0.237 eV), which are far superior to those of the conventional LATP solid electrolytes. Therefore, LAGTP solid electrolytes are potential candidates for use in developing safer high-performance all-solid-state batteries.",

keywords = "Activation energy, Ionic conductivity, LAGTP, Sodium superionic conductor, Solid electrolyte, Solution-based method",

author = "Jiyeon Baek and Baeksang Yoon and Hyeonwoo Jeong and Junho Jeong and Suresh Mamidi and Seo, \{Hyung Kee\} and Lee, \{Cheul Ro\} and Inseok Seo",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = sep,

day = "1",

doi = "10.1016/j.jelechem.2022.116631",

language = "English",

volume = "920",

journal = "Journal of Electroanalytical Chemistry",

issn = "1572-6657",

}

TY - JOUR

T1 - Dependences of ionic conductivity and activation energy on germanium content in superionic Li1.4Al0.4GexTi(1.6−x)(PO4)3 solid electrolytes

AU - Baek, Jiyeon

AU - Yoon, Baeksang

AU - Jeong, Hyeonwoo

AU - Jeong, Junho

AU - Mamidi, Suresh

AU - Seo, Hyung Kee

AU - Lee, Cheul Ro

AU - Seo, Inseok

PY - 2022/9/1

Y1 - 2022/9/1

N2 - Herein, to improve the ionic conductivities of Li1.4Al0.4Ti1.6(PO4)3 (LATP) solid-state electrolytes and establish the optimal Ge content to yield a high lithium-ion conductivity, Ti4+ is partially substituted with Ge4+ to yield Li1.4Al0.4GexTi(1.6−x)(PO4)3 (LAGTP, x = 0.1, 0.2, 0.3, and 0.4). The LAGTP solid electrolytes are synthesized using a facile solution-based method. Further, the obtained material is calcined and sintered at 800 and 900 °C, respectively. The structural properties of the LAGTP ceramic powders are thoroughly investigated, and the dependences of the ionic conductivity and activation energy on Ge content are also explored. The LAGTP (x = 0.1) solid electrolyte exhibits the highest total ionic conductivity (1.05 × 10–3 S/cm) at 25 °C and the lowest activation energy (0.237 eV), which are far superior to those of the conventional LATP solid electrolytes. Therefore, LAGTP solid electrolytes are potential candidates for use in developing safer high-performance all-solid-state batteries.

AB - Herein, to improve the ionic conductivities of Li1.4Al0.4Ti1.6(PO4)3 (LATP) solid-state electrolytes and establish the optimal Ge content to yield a high lithium-ion conductivity, Ti4+ is partially substituted with Ge4+ to yield Li1.4Al0.4GexTi(1.6−x)(PO4)3 (LAGTP, x = 0.1, 0.2, 0.3, and 0.4). The LAGTP solid electrolytes are synthesized using a facile solution-based method. Further, the obtained material is calcined and sintered at 800 and 900 °C, respectively. The structural properties of the LAGTP ceramic powders are thoroughly investigated, and the dependences of the ionic conductivity and activation energy on Ge content are also explored. The LAGTP (x = 0.1) solid electrolyte exhibits the highest total ionic conductivity (1.05 × 10–3 S/cm) at 25 °C and the lowest activation energy (0.237 eV), which are far superior to those of the conventional LATP solid electrolytes. Therefore, LAGTP solid electrolytes are potential candidates for use in developing safer high-performance all-solid-state batteries.

KW - Activation energy

KW - Ionic conductivity

KW - LAGTP

KW - Sodium superionic conductor

KW - Solid electrolyte

KW - Solution-based method

UR - https://www.scopus.com/pages/publications/85134653259

U2 - 10.1016/j.jelechem.2022.116631

DO - 10.1016/j.jelechem.2022.116631

M3 - Journal article

AN - SCOPUS:85134653259

SN - 1572-6657

VL - 920

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

M1 - 116631

ER -