Dual functioned BiOF-coated Li[Li0.1Al0.05Mn1.85]O4 for lithium batteries

被引:66
作者
Lee, Ki-Soo [2 ]
Myung, Seung-Taek [1 ]
Amine, Khalil [3 ]
YashiroB, Hitoshi [1 ]
Sun, Yang-Kook [2 ]
机构
[1] Iwate Univ, Dept Chem Engn, Morioka, Iwate 0208551, Japan
[2] Hanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South Korea
[3] Argonne Natl Lab, Electrochem Technol Program, Div Chem Engn, Argonne, IL 60439 USA
关键词
ION SECONDARY BATTERIES; ELECTROCHEMICAL CYCLING BEHAVIOR; CATHODE MATERIALS; TEMPERATURE PERFORMANCE; ELEVATED-TEMPERATURE; LIMN2O4; CATHODE; SPINEL; IMPROVEMENT; DISSOLUTION; ELECTRODE;
D O I
10.1039/b819224c
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Spinel-type lithium manganese oxides have shown considerable promise for the positive electrode in lithium batteries but have suffered from poor performance at high temperatures (40-60 degrees C). The electrochemical properties of BiOF-coated spinel Li[Li0.1Al0.05Mn1.85]O-4 at elevated temperatures (55 degrees C) were investigated. BiOF nanoparticles were well coated on spinel Li[Li0.1Al0.05Mn1.85]O-4, as confirmed by scanning and transmission electron microscopy. The BiOF-coated spinel Li[Li0.1Al0.05Mn1.85]O-4 electrode had excellent capacity retention at 55 degrees C, maintaining its initial discharge capacity of 96.1% after 100 cycles. This improved cycling performance was ascribed to the presence of the BiOF layer on the spinel particles, which prevented the infiltration of HF generated by the decomposition of electrolytic salt, LiPF6, in the electrolyte. This property resulted in a considerable reduction of manganese dissolution of the BiOF-coated spinel Li[Li0.1Al0.05Mn1.85]O-4. Transmission electron microscopy of extensively cycled particles confirmed that the particle surface of the BiOF-coated Li[Li0.1Al0.05Mn1.85]O-4 remained almost completely undamaged, whereas pristine spinel particles were severely deteriorated. In the present paper, we have tried to understand the role of the BiOF coating layer and why such coatings resulted in better battery performances, using BiOF-coated Li[Li0.1Al0.05Mn1.85]O-4. The BiOF coating layer on the surface of Li[Li0.1Al0.05Mn1.85]O-4 particles can be defined as follows; the oxyfluoride layer provides a strong protecting layer against HF attack and scavenges HF, thus resulting in reducing HF from the electrolyte. Synergistically, these actions resulted in the significantly improved high temperature cycling performances exhibited by the BiOF-coated Li[Li0.1Al0.05Mn1.85]O-4.
引用
收藏
页码:1995 / 2005
页数:11
相关论文
共 41 条
  • [21] Manganese dissolution from lithium doped Li-Mn-O spinel cathode materials into electrolyte solution
    Komaba, S
    Kumagai, N
    Sasaki, T
    Miki, Y
    [J]. ELECTROCHEMISTRY, 2001, 69 (10) : 784 - 787
  • [22] Synthetic optimization of Li[Ni1/3Co1/3Mn1/3]O2 via co-precipitation
    Lee, MH
    Kang, Y
    Myung, ST
    Sun, YK
    [J]. ELECTROCHIMICA ACTA, 2004, 50 (04) : 939 - 948
  • [23] Enhanced high-rate cycling stability of LiMn2O4 cathode by ZrO2 coating for Li-ion battery
    Lin, YM
    Wu, HC
    Yen, YC
    Guo, ZZ
    Yang, MH
    Chen, HM
    Sheu, HS
    Wu, NL
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (08) : A1526 - A1532
  • [24] Electrochemical evaluation of composite cathodes base on blends of LiMn2O4 and LiNi0.8Co0.2O2
    Ma, ZF
    Yang, XQ
    Liao, XZ
    Sun, X
    McBreen, J
    [J]. ELECTROCHEMISTRY COMMUNICATIONS, 2001, 3 (08) : 425 - 428
  • [25] Functionality of oxide coating for Li[Li0.05Ni0.4Co0.15Mn0.4]O2 as positive electrode materials for lithium-ion secondary batteries
    Myung, Seung-Taek
    Izumi, Kentarou
    Komaba, Shinichi
    Yashiro, Hitoshi
    Bang, Hyun Joo
    Sun, Yang-Kook
    Kumagai, Naoaki
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (10) : 4061 - 4067
  • [26] Improvement of cycling performance of Li1.1Mn1.9O4 at 60°C by NiO addition for Li-ion secondary batteries
    Myung, Seung-Taek
    Hosoya, Kiyoharu
    Komaba, Shinichi
    Yashiro, Hitoshi
    Sun, Yang-Kook
    Kumagai, Naoaki
    [J]. ELECTROCHIMICA ACTA, 2006, 51 (26) : 5912 - 5919
  • [27] Electrochemical evaluation of mixed oxide electrode for Li-ion secondary batteries:: Li1.1Mn1.9O4and LiNi0.8Co0.15Al0.05O2
    Myung, ST
    Cho, MH
    Hong, HT
    Kang, TH
    Kim, CS
    [J]. JOURNAL OF POWER SOURCES, 2005, 146 (1-2) : 222 - 225
  • [28] Role of alumina coating on Li-Ni-Co-Mn-O particles as positive electrode material for lithium-ion batteries
    Myung, ST
    Izumi, K
    Komaba, S
    Sun, YK
    Yashiro, H
    Kumagai, N
    [J]. CHEMISTRY OF MATERIALS, 2005, 17 (14) : 3695 - 3704
  • [29] Enhanced structural stability and cyclability of Al-doped LiMn2O4 spinel synthesized by the emulsion drying method
    Myung, ST
    Komaba, S
    Kumagai, N
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2001, 148 (05) : A482 - A489
  • [30] Advantages of blending LiNi0.8Co0.2O2 into Li1+xMn2-xO4 cathodes
    Numata, T
    Amemiya, C
    Kumeuchi, T
    Shirakata, M
    Yonezawa, M
    [J]. JOURNAL OF POWER SOURCES, 2001, 97-8 : 358 - 360