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

Soo Kim, Jae Kyo Noh, Seung-Ho Yu, Wonyoung Chang, Kyung Yoon Chung, Byung Won Cho

Research output: Contribution to journalArticle

28 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 languageEnglish
Pages (from-to)159-165
Number of pages7
JournalJournal of Electroceramics
Volume30
Issue number3
DOIs
Publication statusPublished - 2013 May 1
Externally publishedYes

Fingerprint

surface treatment
Transition metals
Surface treatment
transition metals
Doping (additives)
X rays
Photoelectron spectroscopy
Electrochemical impedance spectroscopy
Electrochemical properties
Chemical elements
Oxides
x ray spectroscopy
metal oxides
x ray diffraction
heat treatment
Diffraction
Heat treatment
photoelectron spectroscopy
impedance
Transmission electron microscopy

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
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Effects of transition metal doping and surface treatment to improve the electrochemical performance of Li2MnO3 . / Kim, Soo; Noh, Jae Kyo; Yu, Seung-Ho; Chang, Wonyoung; Chung, Kyung Yoon; Cho, Byung Won.

In: Journal of Electroceramics, Vol. 30, No. 3, 01.05.2013, p. 159-165.

Research output: Contribution to journalArticle

Kim, Soo ; Noh, Jae Kyo ; Yu, Seung-Ho ; Chang, Wonyoung ; Chung, Kyung Yoon ; Cho, Byung Won. / Effects of transition metal doping and surface treatment to improve the electrochemical performance of Li2MnO3 In: Journal of Electroceramics. 2013 ; Vol. 30, No. 3. pp. 159-165.
@article{79130de9326d4426bdce500796813ed9,
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 Seung-Ho Yu and Wonyoung Chang and Chung, {Kyung Yoon} and Cho, {Byung Won}",
year = "2013",
month = "5",
day = "1",
doi = "10.1007/s10832-012-9778-4",
language = "English",
volume = "30",
pages = "159--165",
journal = "Journal of Electroceramics",
issn = "1385-3449",
publisher = "Springer Netherlands",
number = "3",

}

TY - JOUR

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, Seung-Ho

AU - Chang, Wonyoung

AU - Chung, Kyung Yoon

AU - Cho, Byung Won

PY - 2013/5/1

Y1 - 2013/5/1

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

UR - http://www.scopus.com/inward/record.url?scp=84880701375&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84880701375&partnerID=8YFLogxK

U2 - 10.1007/s10832-012-9778-4

DO - 10.1007/s10832-012-9778-4

M3 - Article

VL - 30

SP - 159

EP - 165

JO - Journal of Electroceramics

JF - Journal of Electroceramics

SN - 1385-3449

IS - 3

ER -