Effects of transition metal doping and surface treatment to improve the electrochemical performance of Li2MnO3

Soo Kim; Jae Kyo Noh; Seungho Yu; Wonyoung Chang; Kyung Yoon Chung; Byung Won Cho

doi:10.1007/s10832-012-9778-4

Effects of transition metal doping and surface treatment to improve the electrochemical performance of Li₂MnO₃

Soo Kim, Jae Kyo Noh, Seungho Yu, Wonyoung Chang, Kyung Yoon Chung, Byung Won Cho

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

34 Citations (Scopus)

Abstract

A novel strategy to improve the electrochemical performance of Li ₂MnO₃ using transition metal doping by the mechanochemical process is proposed. Li₂MnO₃ precursors are treated with transition metal containing chemicals in the mechanochemical process, followed by heat treatment. Cr containing Li₂MnO₃, with only 1 mol% Cr doping, exhibits unique electrochemical properties with a large initial discharge capacity of 234.9 mAh g^-1, which is superior to the 205.0 mAh g^-1 of pristine Li₂MnO₃, and all other transition-metal containing oxides. The structures of Li₂MnO ₃ and Li₂MnO₃ with the transition metal element doping (TM-Li₂MnO₃) are studied by x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), and the electrochemical characteristics are further investigated using electrochemical impedance spectroscopy (EIS) measurements.

Original language	English
Pages (from-to)	159-165
Number of pages	7
Journal	Journal of Electroceramics
Volume	30
Issue number	3
DOIs	https://doi.org/10.1007/s10832-012-9778-4
Publication status	Published - 2013 May
Externally published	Yes

Keywords

Doping
LiMnO
Lithium ion battery
Mechanochemical process
Surface treatment

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Mechanics of Materials
Electrical and Electronic Engineering
Materials Chemistry

UN SDGs

This output contributes to the following Sustainable Development Goal(s)

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title = "Effects of transition metal doping and surface treatment to improve the electrochemical performance of Li2MnO3",

abstract = "A novel strategy to improve the electrochemical performance of Li 2MnO3 using transition metal doping by the mechanochemical process is proposed. Li2MnO3 precursors are treated with transition metal containing chemicals in the mechanochemical process, followed by heat treatment. Cr containing Li2MnO3, with only 1 mol% Cr doping, exhibits unique electrochemical properties with a large initial discharge capacity of 234.9 mAh g-1, which is superior to the 205.0 mAh g-1 of pristine Li2MnO3, and all other transition-metal containing oxides. The structures of Li2MnO 3 and Li2MnO3 with the transition metal element doping (TM-Li2MnO3) are studied by x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), and the electrochemical characteristics are further investigated using electrochemical impedance spectroscopy (EIS) measurements.",

keywords = "Doping, LiMnO, Lithium ion battery, Mechanochemical process, Surface treatment",

author = "Soo Kim and Noh, {Jae Kyo} and Seungho Yu and Wonyoung Chang and Chung, {Kyung Yoon} and Cho, {Byung Won}",

note = "Funding Information: Acknowledgments This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST){"} (NRF-2011-C1AAA001-0030538) and by the Global Research Laboratory Program through the National Research Foundation of Korea (NRF), which is funded by the Ministry of Education, Science and Technology (MEST) (grant number: 2011–00115).",

year = "2013",

month = may,

doi = "10.1007/s10832-012-9778-4",

language = "English",

volume = "30",

pages = "159--165",

journal = "Journal of Electroceramics",

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T1 - Effects of transition metal doping and surface treatment to improve the electrochemical performance of Li2MnO3

AU - Kim, Soo

AU - Noh, Jae Kyo

AU - Yu, Seungho

AU - Chang, Wonyoung

AU - Chung, Kyung Yoon

AU - Cho, Byung Won

N1 - Funding Information: Acknowledgments This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST)" (NRF-2011-C1AAA001-0030538) and by the Global Research Laboratory Program through the National Research Foundation of Korea (NRF), which is funded by the Ministry of Education, Science and Technology (MEST) (grant number: 2011–00115).

PY - 2013/5

Y1 - 2013/5

N2 - A novel strategy to improve the electrochemical performance of Li 2MnO3 using transition metal doping by the mechanochemical process is proposed. Li2MnO3 precursors are treated with transition metal containing chemicals in the mechanochemical process, followed by heat treatment. Cr containing Li2MnO3, with only 1 mol% Cr doping, exhibits unique electrochemical properties with a large initial discharge capacity of 234.9 mAh g-1, which is superior to the 205.0 mAh g-1 of pristine Li2MnO3, and all other transition-metal containing oxides. The structures of Li2MnO 3 and Li2MnO3 with the transition metal element doping (TM-Li2MnO3) are studied by x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), and the electrochemical characteristics are further investigated using electrochemical impedance spectroscopy (EIS) measurements.

AB - A novel strategy to improve the electrochemical performance of Li 2MnO3 using transition metal doping by the mechanochemical process is proposed. Li2MnO3 precursors are treated with transition metal containing chemicals in the mechanochemical process, followed by heat treatment. Cr containing Li2MnO3, with only 1 mol% Cr doping, exhibits unique electrochemical properties with a large initial discharge capacity of 234.9 mAh g-1, which is superior to the 205.0 mAh g-1 of pristine Li2MnO3, and all other transition-metal containing oxides. The structures of Li2MnO 3 and Li2MnO3 with the transition metal element doping (TM-Li2MnO3) are studied by x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), and the electrochemical characteristics are further investigated using electrochemical impedance spectroscopy (EIS) measurements.

KW - Doping

KW - LiMnO

KW - Lithium ion battery

KW - Mechanochemical process

KW - Surface treatment

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