Biomimetic synthesis of metal ion-doped hierarchical crystals using a gel matrix: Formation of cobalt-doped LiMn2O4 with improved electrochemical properties through a cobalt-doped MnCO3 precursor

Takao Kokubu, Yuya Oaki, Hiroaki Uchiyama, Eiji Hosono, Haoshen Zhou, Hiroaki Imai

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We have synthesized spinel type cobalt-doped LiMn2O4 (LiM-n2-yCoy O4, 0≤y≤0.367), a cathode material for a lithium-ion battery, with hierarchical sponge structures via the cobalt-doped MnCO3 (Mn1-xCoxCO3, 0≤x≤0.204) formed in an agar gel matrix. Biomimetic crystal growth in the gel matrix facilitates the generation of both an homogeneous solid solution and the hierarchical structures under ambient condition. The controlled composition and the hierarchical structure of the cobalt-doped MnCO3 precursor played an important role in the formation of the cobalt-doped LiMn 2O4. The charge-discharge reversible stability of the resultant LiMn1.947Co0.053O4 was improved to ca. 12% loss of the discharge capacity after 100 cycles, while pure LiMn 2O4 showed 24% loss of the discharge capacity after 100 cycles. The parallel control of the hierarchical structure and the composition in the precursor material through a biomimetic approach, promises the development of functional materials under mild conditions.

Original languageEnglish
Pages (from-to)792-798
Number of pages7
JournalChemistry - An Asian Journal
Volume5
Issue number4
DOIs
Publication statusPublished - 2010 Apr 1

Fingerprint

Biomimetics
Cobalt
Electrochemical properties
Metal ions
Gels
Metals
Ions
Crystals
Functional materials
Porifera
Crystallization
Chemical analysis
Lithium
Agar
Solid solutions
Electrodes
Cathodes

Keywords

  • Biomimetic synthesis
  • Crystal growth
  • Doping
  • Electrochemistry
  • Lithium-ion battery

ASJC Scopus subject areas

  • Chemistry(all)
  • Medicine(all)

Cite this

@article{684bc753c4bf4844bbfbba0e396122d1,
title = "Biomimetic synthesis of metal ion-doped hierarchical crystals using a gel matrix: Formation of cobalt-doped LiMn2O4 with improved electrochemical properties through a cobalt-doped MnCO3 precursor",
abstract = "We have synthesized spinel type cobalt-doped LiMn2O4 (LiM-n2-yCoy O4, 0≤y≤0.367), a cathode material for a lithium-ion battery, with hierarchical sponge structures via the cobalt-doped MnCO3 (Mn1-xCoxCO3, 0≤x≤0.204) formed in an agar gel matrix. Biomimetic crystal growth in the gel matrix facilitates the generation of both an homogeneous solid solution and the hierarchical structures under ambient condition. The controlled composition and the hierarchical structure of the cobalt-doped MnCO3 precursor played an important role in the formation of the cobalt-doped LiMn 2O4. The charge-discharge reversible stability of the resultant LiMn1.947Co0.053O4 was improved to ca. 12{\%} loss of the discharge capacity after 100 cycles, while pure LiMn 2O4 showed 24{\%} loss of the discharge capacity after 100 cycles. The parallel control of the hierarchical structure and the composition in the precursor material through a biomimetic approach, promises the development of functional materials under mild conditions.",
keywords = "Biomimetic synthesis, Crystal growth, Doping, Electrochemistry, Lithium-ion battery",
author = "Takao Kokubu and Yuya Oaki and Hiroaki Uchiyama and Eiji Hosono and Haoshen Zhou and Hiroaki Imai",
year = "2010",
month = "4",
day = "1",
doi = "10.1002/asia.200900494",
language = "English",
volume = "5",
pages = "792--798",
journal = "Chemistry - An Asian Journal",
issn = "1861-4728",
publisher = "John Wiley and Sons Ltd",
number = "4",

}

TY - JOUR

T1 - Biomimetic synthesis of metal ion-doped hierarchical crystals using a gel matrix

T2 - Formation of cobalt-doped LiMn2O4 with improved electrochemical properties through a cobalt-doped MnCO3 precursor

AU - Kokubu, Takao

AU - Oaki, Yuya

AU - Uchiyama, Hiroaki

AU - Hosono, Eiji

AU - Zhou, Haoshen

AU - Imai, Hiroaki

PY - 2010/4/1

Y1 - 2010/4/1

N2 - We have synthesized spinel type cobalt-doped LiMn2O4 (LiM-n2-yCoy O4, 0≤y≤0.367), a cathode material for a lithium-ion battery, with hierarchical sponge structures via the cobalt-doped MnCO3 (Mn1-xCoxCO3, 0≤x≤0.204) formed in an agar gel matrix. Biomimetic crystal growth in the gel matrix facilitates the generation of both an homogeneous solid solution and the hierarchical structures under ambient condition. The controlled composition and the hierarchical structure of the cobalt-doped MnCO3 precursor played an important role in the formation of the cobalt-doped LiMn 2O4. The charge-discharge reversible stability of the resultant LiMn1.947Co0.053O4 was improved to ca. 12% loss of the discharge capacity after 100 cycles, while pure LiMn 2O4 showed 24% loss of the discharge capacity after 100 cycles. The parallel control of the hierarchical structure and the composition in the precursor material through a biomimetic approach, promises the development of functional materials under mild conditions.

AB - We have synthesized spinel type cobalt-doped LiMn2O4 (LiM-n2-yCoy O4, 0≤y≤0.367), a cathode material for a lithium-ion battery, with hierarchical sponge structures via the cobalt-doped MnCO3 (Mn1-xCoxCO3, 0≤x≤0.204) formed in an agar gel matrix. Biomimetic crystal growth in the gel matrix facilitates the generation of both an homogeneous solid solution and the hierarchical structures under ambient condition. The controlled composition and the hierarchical structure of the cobalt-doped MnCO3 precursor played an important role in the formation of the cobalt-doped LiMn 2O4. The charge-discharge reversible stability of the resultant LiMn1.947Co0.053O4 was improved to ca. 12% loss of the discharge capacity after 100 cycles, while pure LiMn 2O4 showed 24% loss of the discharge capacity after 100 cycles. The parallel control of the hierarchical structure and the composition in the precursor material through a biomimetic approach, promises the development of functional materials under mild conditions.

KW - Biomimetic synthesis

KW - Crystal growth

KW - Doping

KW - Electrochemistry

KW - Lithium-ion battery

UR - http://www.scopus.com/inward/record.url?scp=77950796958&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77950796958&partnerID=8YFLogxK

U2 - 10.1002/asia.200900494

DO - 10.1002/asia.200900494

M3 - Article

C2 - 20198677

AN - SCOPUS:77950796958

VL - 5

SP - 792

EP - 798

JO - Chemistry - An Asian Journal

JF - Chemistry - An Asian Journal

SN - 1861-4728

IS - 4

ER -