Cathode Properties of Phospho-olivine for Lithium Secondary Batteries

Shigeto Okada; Shoichiro Sawa; Minato Egashira; Jun-ichi Yamaki

doi:10.15017/7925

Cathode Properties of Phospho-olivine for Lithium Secondary Batteries

Shigeto Okada, Shoichiro Sawa, Minato Egashira, Jun-ichi Yamaki

先端素子材料部門

研究成果: Contribution to journal › Article

抄録

Four types of orthorhombic olivine LiMPO_4 (M:Co, Fe, Ni, Mn) were investigated as high voltage cathode active materials for lithium secondary batteries. LiCoPO_4 exhibited the highest 4.8V discharge plateau of 100mAh/g vs. Li/Li^+ after initial charging to 5.1V and its energy density was comparable to that of layeredrocksalt LiCoO_2 (120mAh/g×4V=480mWh/g). In contrast, the open circuit voltage profile of LiFePO_4 was 160mAh/g on the 3V plateau. TG-DSC measurements showed that the thermal stability of charged Li_<1-x>CoPO_4 is better than that of fully-charged Li_<1-x>CoO_2. The chemical state of Co in LiCoPO_4 was also analyzed using HRXRF.

本文言語	英語
ページ（範囲）	133-137
ページ数	5
ジャーナル	The Reports of Institute of Advanced Material Study,Kyushu University
巻	14
号	2
DOI	https://doi.org/10.15017/7925
出版ステータス	出版済み - 2000

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10.15017/7925

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引用スタイル

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title = "Cathode Properties of Phospho-olivine for Lithium Secondary Batteries",

abstract = "Four types of orthorhombic olivine LiMPO_4 (M:Co, Fe, Ni, Mn) were investigated as high voltage cathode active materials for lithium secondary batteries. LiCoPO_4 exhibited the highest 4.8V discharge plateau of 100mAh/g vs. Li/Li^+ after initial charging to 5.1V and its energy density was comparable to that of layeredrocksalt LiCoO_2 (120mAh/g×4V=480mWh/g). In contrast, the open circuit voltage profile of LiFePO_4 was 160mAh/g on the 3V plateau. TG-DSC measurements showed that the thermal stability of charged Li_<1-x>CoPO_4 is better than that of fully-charged Li_<1-x>CoO_2. The chemical state of Co in LiCoPO_4 was also analyzed using HRXRF.",

author = "Shigeto Okada and Shoichiro Sawa and Minato Egashira and Jun-ichi Yamaki",

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T1 - Cathode Properties of Phospho-olivine for Lithium Secondary Batteries

AU - Okada, Shigeto

AU - Sawa, Shoichiro

AU - Egashira, Minato

AU - Yamaki, Jun-ichi

PY - 2000

Y1 - 2000

N2 - Four types of orthorhombic olivine LiMPO_4 (M:Co, Fe, Ni, Mn) were investigated as high voltage cathode active materials for lithium secondary batteries. LiCoPO_4 exhibited the highest 4.8V discharge plateau of 100mAh/g vs. Li/Li^+ after initial charging to 5.1V and its energy density was comparable to that of layeredrocksalt LiCoO_2 (120mAh/g×4V=480mWh/g). In contrast, the open circuit voltage profile of LiFePO_4 was 160mAh/g on the 3V plateau. TG-DSC measurements showed that the thermal stability of charged Li_<1-x>CoPO_4 is better than that of fully-charged Li_<1-x>CoO_2. The chemical state of Co in LiCoPO_4 was also analyzed using HRXRF.

AB - Four types of orthorhombic olivine LiMPO_4 (M:Co, Fe, Ni, Mn) were investigated as high voltage cathode active materials for lithium secondary batteries. LiCoPO_4 exhibited the highest 4.8V discharge plateau of 100mAh/g vs. Li/Li^+ after initial charging to 5.1V and its energy density was comparable to that of layeredrocksalt LiCoO_2 (120mAh/g×4V=480mWh/g). In contrast, the open circuit voltage profile of LiFePO_4 was 160mAh/g on the 3V plateau. TG-DSC measurements showed that the thermal stability of charged Li_<1-x>CoPO_4 is better than that of fully-charged Li_<1-x>CoO_2. The chemical state of Co in LiCoPO_4 was also analyzed using HRXRF.

U2 - 10.15017/7925

DO - 10.15017/7925

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JO - The Reports of Institute of Advanced Material Study,Kyushu University

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