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Crystal Alignment Technology of Electrode Material for Enhancing Electrochemical Performance in Lithium Ion Battery

Title
Crystal Alignment Technology of Electrode Material for Enhancing Electrochemical Performance in Lithium Ion Battery
Authors
Kim, ChamYang, YeokyungLopez, David Humberto
DGIST Authors
Kim, Cham; Yang, Yeokyung; Lopez, David Humberto
Issue Date
2021-04
Citation
Journal of the Electrochemical Society, 168(4), 040502
Type
Article
Author Keywords
BatteriesLi-ionElectrode KineticsPhysical properties of electronic materials
ISSN
0013-4651
Abstract
The crystal alignment technology of lithium nickel manganese oxide (LiNi0.5Mn0.3Co0.2O2) is proposed using its magnetic properties. The crystalline LiNi0.5Mn0.3Co0.2O2 exhibits the paramagnetic behavior at room temperature as well as the magnetic anisotropy originated from its crystallographic anisotropy. If the crystalline LiNi0.5Mn0.3Co0.2O2 is exposed to a magnetic field, it can tend to rotate to an angle minimizing its system energy due to spontaneous magnetization. Taking these magnetic natures into account, the vector quantity of an external magnetic field (i.e., magnetic flux density and field direction) is adjusted to apply to a viscous LiNi0.5Mn0.3Co0.2O2 slurry coated onto a current collector; thus, the crystal aligned LiNi0.5Mn0.3Co0.2O2 electrode is obtained, in which the (00 l) plane is notably oriented perpendicular to the surface of a current collector. The aligned LiNi0.5Mn0.3Co0.2O2 electrode consistently records superior electrochemical performance to a pristine LiNi0.5Mn0.3Co0.2O2 electrode because the former demonstrates an improved capability of lithium ion transport during the charge/discharge process in a lithium ion battery. The aligned LiNi0.5Mn0.3Co0.2O2 is considered to have the improved transport capability because the kinetics of lithium ion transport in LiNixMnyCo1-(x+y)O2 intrinsically occurs along the (00 l) plane.
URI
http://hdl.handle.net/20.500.11750/15333
DOI
10.1149/1945-7111/abf17c
Publisher
Electrochemical Society, Inc.
Related Researcher
Files:
There are no files associated with this item.
Collection:
Division of Nanotechnology1. Journal Articles


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