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http://dx.doi.org/10.5229/JKES.2011.14.2.077

PH Effect of [Li,La]TiO3 Coating Solution on Electrochemical Property of Li[Ni0.35Co0.3Mn0.35]O2 Cathode  

Jung, Kwang-Hee (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology)
Kim, Seuk-Buom (Department of Advanced Materials Engineering, Kyonggi University)
Park, Yong-Joon (Department of Advanced Materials Engineering, Kyonggi University)
Publication Information
Journal of the Korean Electrochemical Society / v.14, no.2, 2011 , pp. 77-82 More about this Journal
Abstract
The surface of $Li[Ni_{0.35}Co_{0.3}Mn_{0.35}]O_2$ cathode was modified by $[Li,La]TiO_3$ coating using pH controlled coating solution. At low pH values (acidic solution), cathode powders, which is oxides, have a positive surface charge, whereas, they have a negative surface charge at high pH values. As a result, their charge could affect the formation of the coating layer on the surface of cathode powder. To determine the optimal pH value, the surface coating of the pristine powder was carried out at various pH values of the coating solution. The surface morphology of coated samples was characterization by SEM and TEM analyses. Impedance analysis and cyclic voltammogram presented that internal resistance of the cell was dependent upon the pH of coating solution.
Keywords
pH effect; Coating; Cathode; Secondary battery;
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1 K. S. Ryu, S. H. Lee, B. K. Koo, J. W. Lee, K. M. Kim, and Y. J. Park, "The Effect of Surface Modification with La-M-O (M = Ni, Li) on Electrochemical Performances of $Li[Ni_{0.8}Co_{0.15}Al_{0.05}]O_2$ Cathode" J. Appl. Electrochem., 38, 1385 (2008).   DOI
2 J. Cho, Y. W. Kim, B. Kim, J. G. Lee, and B. Park, "Cathodes for Lithium Ion Batteries: The Benefits of Using Nanostructured Materials" Angew. Chem. Int. Ed., 42, 1618 (2003).   DOI
3 Y. Wu, A. V. Murugan, and A. Manthiram, "High Capacity $Li[Li_{0.2}Mn_{0.54}Ni_{0.13}Co_{0.13}]O_2-VO_2(B)$ composite Cathodes with Controlled Irreversible Capacity Loss for Lithium-Ion Batteries" J. Electrochem. Soc., 155, A635 (2008).   DOI
4 G. R. Hu, X. R. Dengm, Z. D. Peng, and K. Du, "Comparison of $AlPO_4-$ and $Co_3(PO_4)_2-coated$ $LiNi_{0.8}Co_{0.2}O_2$ cathode materials for Li-ion battery" Electrochimical Acta, 53, 2567 (2008).   DOI
5 J. M. Zheng, Z. R. Zhang, X. B. Wu, Z. X. Dong, Z. Zhu, and Y. Yang, "$LiNi_{0.8}Co_{0.15}Al_{0.05}O_2$ cathode materials prepared by $TiO_2$ nanoparticle coatings on $Ni_{0.8}Co_{0.15}Al_{0.05}(OH)_2$ recursors" J. Electrochemical. Soc., 155, A775 (2008).   DOI
6 D.-J. Lee, K.-S. Lee, S.-T. Myung, H. Yashirob, and Y.-K. Sun, "The Effect of Surface Modification with La-M-O (M = Ni,Li) on Electrochemical Performances of $Li[Ni_{0.8}Co_{0.15}Al_{0.05}]O_2$ Cathode" J. Power Sources, 196, 1353 (2011).   DOI
7 S. H. Yun, K. S. Park, and Y. J. Park, "The electrochemical property of ZrFx-coated $Li[Ni_{1/3}Co_{1/3}Mn_{1/3}]O_2$ cathode material" J. Power Sources, 195, 6108 (2010).   DOI
8 J. Cho, Y. W. Kim, B. Kim, J. G. Lee, and B. Park, "Enhanced Stability of $LiCoO_2$ Cathodes in Lithium-Ion Batteries Using Surface Modification by Atomic Layer Deposition" Angew. Chem. Int. Ed., 42, 1618 (2003).   DOI
9 H. J. Lee, K.-S. Park, and Y. J. Park, "Surface modification of $Li[Ni_{0.3}Co_{0.4}Mn_{0.3}]O_2$ cathode by Li-La-Ti-O coating" J. Power Sources, 195, 6122 (2010).   DOI
10 J. Liu and A. Manthiram, "Carbon-coated highcapacity layered $Li[Li_{0.2}Mn_{0.54}Ni_{0.13}Co_{0.13}]O_2$ cathodes" J. Electrochem. Soc., 156, A66 (2009).
11 S. H. Kang and M. M. Thackeray, "Synthesis-Structure- Property Relations in Layered, "Li-excess" Oxides Electrode Materials $Li[Li_{1/3-2x/3}]O_2$ (x = 1/3, 1/4, and 1/5)" Electrochem. Commun., 11, 748 (2009).   DOI
12 J. Liu and A. Manthiram, "Significant Improvement of LiNi0.8Co0.15Al0.05O2 Cathodes at $60^{\circ}C$ by $SiO_2$ Dry Coating for Li-Ion Batteries" J. Electrochem. Soc., 156, A833 (2009).   DOI
13 S. T. Myung, K. Izumi, S. Komaba, Y. K. Sun, H. Yashiro, and N. Kumagai, "Effect of Ball Milling on the Electrochemical Performance of $Li_{1.02}Ni_{0.4}Co_{0.2}Mn_{0.4}O_2$ Cathode Synthesized by Citric Acid-Assisted Sol-Gel Process" Chem. Mater., 17, 3695 (2005).   DOI
14 G. T. K. Fey, C. Z. Lu, J. D. Huang, T. P. Kumar, and Y. C. Chang, "Nanoparticulate coatings for enhanced cyclability of $LiCoO_2$ cathodes", J. Power Sources , 146, 65 (2005).   DOI