Improved Thermal and Structural Stability of LiNi0.8Co0.1Mn0.1O2 cathode materials by Surface Modification

DC Field Value Language
dc.contributor.advisor Cho, Jaephil - Nam, Haisol - 2015-09-09T07:28:35Z - 2015-09-09T07:28:35Z - 2015-08 -
dc.identifier.uri -
dc.identifier.uri -
dc.description Department of Energy Engineering(Battery Science and Technology) en_US
dc.description.abstract The Ni-based cathode materials have attracted a lot of attentions for the higher practical capacity than other cathode materials, but suffer from several inherent problems such as thermal instabilities and severe capacity fading. In order to overcome those problems, a lot of attempts such as surface coating or doping, were tried. However the intrinsic problems of Ni-based cathode materials are still not perfectly solved. Herein, to overcome the structural instability problem of the LiNi0.8Co0.1Mn0.1O2, we suggest a surface modification method that could reduce and delay the heat generation and also improve the electrochemical performances at 60℃. The magnesium phosphate, Mg3(PO4)2, was coated on the surface of the LiNi0.8Co0.1Mn0.1O2 in purpose to enhance the structural stability at high temperatures. This method could remove the surface lithium residues by forming olivine LixMgPO4 using the residual lithium ions with a nanoscale range. Since the olivine structure shows remarkable thermal stability due to the strong bonding of the phosphorous and oxygen atoms, thermal degradation of the material could be delayed. After the surface treatment, cyclability at high temperature (at 60℃) was improved up to 20% and the thermal stability is secured at the same time. en_US
dc.description.statementofresponsibility open -
dc.publisher Graduate School of UNIST en_US
dc.title Improved Thermal and Structural Stability of LiNi0.8Co0.1Mn0.1O2 cathode materials by Surface Modification en_US
dc.type Master's thesis en_US
Appears in Collections:

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show simple item record


  • mendeley


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.