Electrochemical characteristics of LiCoO2 and LiMn2O4 prepared in supercritical water

Kiyoshi Kanamura; Takao Umegaki; Katsunori Toyoshima; Ken Ichi Okada; Yukiya Hakuta; Tadafumi Adschiri; Kunio Arai

Electrochemical characteristics of LiCoO₂ and LiMn₂O₄ prepared in supercritical water

Kiyoshi Kanamura, Takao Umegaki, Katsunori Toyoshima, Ken Ichi Okada, Yukiya Hakuta, Tadafumi Adschiri, Kunio Arai

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article

8 Citations (Scopus)

Abstract

LiCoO₂ and LiMn₂O₄ particles were prepared in supercritical water under optimized preparation conditions using a flow type cell. The preparation of these oxides was finished within 30 sec. LiCoO₂ and LiMn₂O₄ particles prepared in this study have less than 1.0 μm diameter. These particles exhibited a hexagonal shape. Electron diffraction patterns for LiCoO₂ and LiMn₂O₄ hexagonal particles did not show any rings, indicating that the both particles prepared in this study has a nature of single crystal. The discharge and charge characteristics of the LiCoO₂ were good for battery applications. However, the discharge capacity of LiMn₂O₄ was small due to a presence of large amount impurity phases. On the other hand, the reversibility of discharge and charge processes is extremely high, compared with an ordinary LiMn₂O₄.

Original language	English
Pages (from-to)	147-150
Number of pages	4
Journal	Key Engineering Materials
Issue number	181-182
Publication status	Published - 2000 Jan 1

Keywords

LiCoO
LiMnO
Rechargeable Lithium Battery
Supercritical Water

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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Kanamura, K., Umegaki, T., Toyoshima, K., Okada, K. I., Hakuta, Y., Adschiri, T., & Arai, K. (2000). Electrochemical characteristics of LiCoO₂ and LiMn₂O₄ prepared in supercritical water. Key Engineering Materials, (181-182), 147-150.

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title = "Electrochemical characteristics of LiCoO2 and LiMn2O4 prepared in supercritical water",

abstract = "LiCoO2 and LiMn2O4 particles were prepared in supercritical water under optimized preparation conditions using a flow type cell. The preparation of these oxides was finished within 30 sec. LiCoO2 and LiMn2O4 particles prepared in this study have less than 1.0 μm diameter. These particles exhibited a hexagonal shape. Electron diffraction patterns for LiCoO2 and LiMn2O4 hexagonal particles did not show any rings, indicating that the both particles prepared in this study has a nature of single crystal. The discharge and charge characteristics of the LiCoO2 were good for battery applications. However, the discharge capacity of LiMn2O4 was small due to a presence of large amount impurity phases. On the other hand, the reversibility of discharge and charge processes is extremely high, compared with an ordinary LiMn2O4.",

keywords = "LiCoO, LiMnO, Rechargeable Lithium Battery, Supercritical Water",

author = "Kiyoshi Kanamura and Takao Umegaki and Katsunori Toyoshima and Okada, {Ken Ichi} and Yukiya Hakuta and Tadafumi Adschiri and Kunio Arai",

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T1 - Electrochemical characteristics of LiCoO2 and LiMn2O4 prepared in supercritical water

AU - Kanamura, Kiyoshi

AU - Umegaki, Takao

AU - Toyoshima, Katsunori

AU - Okada, Ken Ichi

AU - Hakuta, Yukiya

AU - Adschiri, Tadafumi

AU - Arai, Kunio

PY - 2000/1/1

Y1 - 2000/1/1

N2 - LiCoO2 and LiMn2O4 particles were prepared in supercritical water under optimized preparation conditions using a flow type cell. The preparation of these oxides was finished within 30 sec. LiCoO2 and LiMn2O4 particles prepared in this study have less than 1.0 μm diameter. These particles exhibited a hexagonal shape. Electron diffraction patterns for LiCoO2 and LiMn2O4 hexagonal particles did not show any rings, indicating that the both particles prepared in this study has a nature of single crystal. The discharge and charge characteristics of the LiCoO2 were good for battery applications. However, the discharge capacity of LiMn2O4 was small due to a presence of large amount impurity phases. On the other hand, the reversibility of discharge and charge processes is extremely high, compared with an ordinary LiMn2O4.

AB - LiCoO2 and LiMn2O4 particles were prepared in supercritical water under optimized preparation conditions using a flow type cell. The preparation of these oxides was finished within 30 sec. LiCoO2 and LiMn2O4 particles prepared in this study have less than 1.0 μm diameter. These particles exhibited a hexagonal shape. Electron diffraction patterns for LiCoO2 and LiMn2O4 hexagonal particles did not show any rings, indicating that the both particles prepared in this study has a nature of single crystal. The discharge and charge characteristics of the LiCoO2 were good for battery applications. However, the discharge capacity of LiMn2O4 was small due to a presence of large amount impurity phases. On the other hand, the reversibility of discharge and charge processes is extremely high, compared with an ordinary LiMn2O4.

KW - LiCoO

KW - LiMnO

KW - Rechargeable Lithium Battery

KW - Supercritical Water

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