Journal
ELECTROCHIMICA ACTA
Volume 153, Issue -, Pages 115-121Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.12.001
Keywords
Sulfated zirconia; surface modification; Ni-rich oxide; cathode; lithium secondary battery
Categories
Funding
- IT R&D program of MOTIE (Ministry of Trade, Industry & Energy, Republic of Korea)/KEIT [10041586, 1044519]
- MOTIE/KETEP [20112010100140]
- National Research Foundation of Korea (NRF) - Ministry of Education [2009-0093814]
- National Research Foundation of Korea [2009-0093814] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Sulfated zirconia was successfully synthesized and uniformly coated onto a nickel-rich layered lithium oxide (LiNi0.8Co0.1Mn0.1O2), and investigated with a view to its potential use as a cathode material in Li-ion batteries. The uniformity of this sulfated zirconia coating was confirmed through electron microscopy, energy dispersive spectroscopy and Fourier transform infrared spectroscopy. Furthermore, the electrochemical properties of the sulfated-zirconia-coated LiNi0.8Co0.1Mn0.1O2 electrode were found to be greatly improved compared to those of pristine LiNi0.8Co0.1Mn0.1O2 and zirconia-coated LiNi0.8Co0.1Mn0.1O2, especially at elevated temperature (60 degrees C). These results are directly attributed to the sulfated zirconia coating, which is effective in reducing side reactions by preventing direct contact between the active materials and electrolyte solutions, as well as forming a more stable solid electrolyte interphase (SEI) layer on the active material surface. (C) 2014 Elsevier Ltd. All rights reserved.
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