Abstract
A modified synthesis process was developed based on co-precipitation method followed by spray drying process. In this process, a spherical shaped (Co{sub 1/3}Ni{sub 1/3}Mn{sub 1/3})(OH){sub 2} precursor was synthesized by co-precipitation and pre-heated at 500 C to form a high structural stability spinel (CoNiMn)O{sub 4} to maintain its shape for further processing. The spherical LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} was then prepared by spray drying process using spherical spinel (CoNiMn)O{sub 4}. LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} powders were then modified by coating their surface with a uniform and nano-sized layer of ZrO{sub 2}. The ZrO{sub 2}-coated LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} material exhibited an improved rate capability and cycling stability under a high cut-off voltage of 4.5 V. X-ray diffraction (XRD) measurements revealed that the material had a well-ordered layered structure and Zr was not doped into the LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2}. Electrochemical impedance spectroscopy measurements showed that the coated material has stable cell resistance regardless of cycle number. The interrupt charging/discharging test indicated that the ZrO{sub 2} coating can suppress the polarization effects during the charging and discharging process. From these results, it is believed that the improved cycling performance of ZrO{sub 2}-coated LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2}
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Hu, Shao-Kang;
Cheng, Geng-Hao;
Cheng, Ming-Yao;
Santhanam, Raman;
[1]
Hwang, Bing-Joe;
[1]
National Synchrotron Radiation Research Center, Hsinchu 300 (China)]
- Nanoelectrochemistry Laboratory, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106 (China)
Citation Formats
Hu, Shao-Kang, Cheng, Geng-Hao, Cheng, Ming-Yao, Santhanam, Raman, Hwang, Bing-Joe, and National Synchrotron Radiation Research Center, Hsinchu 300 (China)].
Cycle life improvement of ZrO{sub 2}-coated spherical LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} cathode material for lithium ion batteries.
Netherlands: N. p.,
2009.
Web.
doi:10.1016/J.JPOWSOUR.2008.11.113.
Hu, Shao-Kang, Cheng, Geng-Hao, Cheng, Ming-Yao, Santhanam, Raman, Hwang, Bing-Joe, & National Synchrotron Radiation Research Center, Hsinchu 300 (China)].
Cycle life improvement of ZrO{sub 2}-coated spherical LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} cathode material for lithium ion batteries.
Netherlands.
https://doi.org/10.1016/J.JPOWSOUR.2008.11.113
Hu, Shao-Kang, Cheng, Geng-Hao, Cheng, Ming-Yao, Santhanam, Raman, Hwang, Bing-Joe, and National Synchrotron Radiation Research Center, Hsinchu 300 (China)].
2009.
"Cycle life improvement of ZrO{sub 2}-coated spherical LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} cathode material for lithium ion batteries."
Netherlands.
https://doi.org/10.1016/J.JPOWSOUR.2008.11.113.
@misc{etde_21168693,
title = {Cycle life improvement of ZrO{sub 2}-coated spherical LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} cathode material for lithium ion batteries}
author = {Hu, Shao-Kang, Cheng, Geng-Hao, Cheng, Ming-Yao, Santhanam, Raman, Hwang, Bing-Joe, and National Synchrotron Radiation Research Center, Hsinchu 300 (China)]}
abstractNote = {A modified synthesis process was developed based on co-precipitation method followed by spray drying process. In this process, a spherical shaped (Co{sub 1/3}Ni{sub 1/3}Mn{sub 1/3})(OH){sub 2} precursor was synthesized by co-precipitation and pre-heated at 500 C to form a high structural stability spinel (CoNiMn)O{sub 4} to maintain its shape for further processing. The spherical LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} was then prepared by spray drying process using spherical spinel (CoNiMn)O{sub 4}. LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} powders were then modified by coating their surface with a uniform and nano-sized layer of ZrO{sub 2}. The ZrO{sub 2}-coated LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} material exhibited an improved rate capability and cycling stability under a high cut-off voltage of 4.5 V. X-ray diffraction (XRD) measurements revealed that the material had a well-ordered layered structure and Zr was not doped into the LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2}. Electrochemical impedance spectroscopy measurements showed that the coated material has stable cell resistance regardless of cycle number. The interrupt charging/discharging test indicated that the ZrO{sub 2} coating can suppress the polarization effects during the charging and discharging process. From these results, it is believed that the improved cycling performance of ZrO{sub 2}-coated LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} is attributed to the ability of ZrO{sub 2} layer in preventing direct contact of the active material with the electrolyte resulting in a decrease of electrolyte decomposition reactions. (author)}
doi = {10.1016/J.JPOWSOUR.2008.11.113}
journal = []
issue = {2}
volume = {188}
place = {Netherlands}
year = {2009}
month = {Mar}
}
title = {Cycle life improvement of ZrO{sub 2}-coated spherical LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} cathode material for lithium ion batteries}
author = {Hu, Shao-Kang, Cheng, Geng-Hao, Cheng, Ming-Yao, Santhanam, Raman, Hwang, Bing-Joe, and National Synchrotron Radiation Research Center, Hsinchu 300 (China)]}
abstractNote = {A modified synthesis process was developed based on co-precipitation method followed by spray drying process. In this process, a spherical shaped (Co{sub 1/3}Ni{sub 1/3}Mn{sub 1/3})(OH){sub 2} precursor was synthesized by co-precipitation and pre-heated at 500 C to form a high structural stability spinel (CoNiMn)O{sub 4} to maintain its shape for further processing. The spherical LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} was then prepared by spray drying process using spherical spinel (CoNiMn)O{sub 4}. LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} powders were then modified by coating their surface with a uniform and nano-sized layer of ZrO{sub 2}. The ZrO{sub 2}-coated LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} material exhibited an improved rate capability and cycling stability under a high cut-off voltage of 4.5 V. X-ray diffraction (XRD) measurements revealed that the material had a well-ordered layered structure and Zr was not doped into the LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2}. Electrochemical impedance spectroscopy measurements showed that the coated material has stable cell resistance regardless of cycle number. The interrupt charging/discharging test indicated that the ZrO{sub 2} coating can suppress the polarization effects during the charging and discharging process. From these results, it is believed that the improved cycling performance of ZrO{sub 2}-coated LiNi{sub 1/3}Co{sub 1/3}Mn{sub 1/3}O{sub 2} is attributed to the ability of ZrO{sub 2} layer in preventing direct contact of the active material with the electrolyte resulting in a decrease of electrolyte decomposition reactions. (author)}
doi = {10.1016/J.JPOWSOUR.2008.11.113}
journal = []
issue = {2}
volume = {188}
place = {Netherlands}
year = {2009}
month = {Mar}
}