Effects of Cl doping on the structural and electrochemical properties of high voltage LiMn1.5Ni0.5O4 cathode materials for Li-ion batteries

Won Keun Kim; Dong Wook Han; Won Hee Ryu; Sung Jin Lim; Ji Yong Eom; Hyuk Sang Kwon

doi:10.1016/j.jallcom.2013.12.248

Effects of Cl doping on the structural and electrochemical properties of high voltage LiMn_1.5Ni_0.5O₄ cathode materials for Li-ion batteries

Won Keun Kim, Dong Wook Han, Won Hee Ryu, Sung Jin Lim, Ji Yong Eom, Hyuk Sang Kwon

Dept. of Future Energy Convergence

Research output: Contribution to journal › Article › peer-review

70 Scopus citations

Abstract

LiMn_1.5Ni_0.5O₄ and LiMn _1.5Ni_0.5O_3.9Cl_0.1 are prepared by a solution-based process to investigate the influences of Cl doping on the structural and electrochemical properties of high voltage LiMn _1.5Ni_0.5O₄ cathode materials for Li-ion batteries. LiMn_1.5Ni_0.5O_3.9Cl_0.1 features an improved cyclic performance at 30 C and 55 C compared with LiMn _1.5Ni_0.5O₄, which originates from the enhanced structural stability by formation of strong Mn-Cl and Ni-Cl bonds revealed by XPS analysis. The improvement in the rate capability of LiMn _1.5Ni_0.5O_3.9Cl_0.1 is attributed to the facilitated Li-ion diffusion in the lattice, due primarily to the larger ionic radius of Cl than that of O. From the GITT analysis, it is revealed that the Li-ion diffusivity of LiMn_1.5Ni_0.5O _3.9Cl_0.1 is improved about 2 times compared with that of LiMn_1.5Ni_0.5O₄. The improved Li-ion diffusivity in the lattice is assigned to the increase in the lattice constant of LiMn _1.5Ni_0.5O_3.9Cl_0.1 compared with that of LiMn_1.5Ni_0.5O₄ by the doping of Cl.

Original language	English
Pages (from-to)	48-52
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	592
DOIs	https://doi.org/10.1016/j.jallcom.2013.12.248
State	Published - 15 Apr 2014

Keywords

Chlorine doping
High voltage cathode
Li-ion batteries
Li-ion diffusivity
LiMnNiO

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10.1016/j.jallcom.2013.12.248

Cite this

@article{daf2cc9d6c544975864839a19821f969,

title = "Effects of Cl doping on the structural and electrochemical properties of high voltage LiMn1.5Ni0.5O4 cathode materials for Li-ion batteries",

abstract = "LiMn1.5Ni0.5O4 and LiMn 1.5Ni0.5O3.9Cl0.1 are prepared by a solution-based process to investigate the influences of Cl doping on the structural and electrochemical properties of high voltage LiMn 1.5Ni0.5O4 cathode materials for Li-ion batteries. LiMn1.5Ni0.5O3.9Cl0.1 features an improved cyclic performance at 30 C and 55 C compared with LiMn 1.5Ni0.5O4, which originates from the enhanced structural stability by formation of strong Mn-Cl and Ni-Cl bonds revealed by XPS analysis. The improvement in the rate capability of LiMn 1.5Ni0.5O3.9Cl0.1 is attributed to the facilitated Li-ion diffusion in the lattice, due primarily to the larger ionic radius of Cl than that of O. From the GITT analysis, it is revealed that the Li-ion diffusivity of LiMn1.5Ni0.5O 3.9Cl0.1 is improved about 2 times compared with that of LiMn1.5Ni0.5O4. The improved Li-ion diffusivity in the lattice is assigned to the increase in the lattice constant of LiMn 1.5Ni0.5O3.9Cl0.1 compared with that of LiMn1.5Ni0.5O4 by the doping of Cl.",

keywords = "Chlorine doping, High voltage cathode, Li-ion batteries, Li-ion diffusivity, LiMnNiO",

author = "Kim, \{Won Keun\} and Han, \{Dong Wook\} and Ryu, \{Won Hee\} and Lim, \{Sung Jin\} and Eom, \{Ji Yong\} and Kwon, \{Hyuk Sang\}",

year = "2014",

month = apr,

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doi = "10.1016/j.jallcom.2013.12.248",

language = "English",

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T1 - Effects of Cl doping on the structural and electrochemical properties of high voltage LiMn1.5Ni0.5O4 cathode materials for Li-ion batteries

AU - Kim, Won Keun

AU - Han, Dong Wook

AU - Ryu, Won Hee

AU - Lim, Sung Jin

AU - Eom, Ji Yong

AU - Kwon, Hyuk Sang

PY - 2014/4/15

Y1 - 2014/4/15

N2 - LiMn1.5Ni0.5O4 and LiMn 1.5Ni0.5O3.9Cl0.1 are prepared by a solution-based process to investigate the influences of Cl doping on the structural and electrochemical properties of high voltage LiMn 1.5Ni0.5O4 cathode materials for Li-ion batteries. LiMn1.5Ni0.5O3.9Cl0.1 features an improved cyclic performance at 30 C and 55 C compared with LiMn 1.5Ni0.5O4, which originates from the enhanced structural stability by formation of strong Mn-Cl and Ni-Cl bonds revealed by XPS analysis. The improvement in the rate capability of LiMn 1.5Ni0.5O3.9Cl0.1 is attributed to the facilitated Li-ion diffusion in the lattice, due primarily to the larger ionic radius of Cl than that of O. From the GITT analysis, it is revealed that the Li-ion diffusivity of LiMn1.5Ni0.5O 3.9Cl0.1 is improved about 2 times compared with that of LiMn1.5Ni0.5O4. The improved Li-ion diffusivity in the lattice is assigned to the increase in the lattice constant of LiMn 1.5Ni0.5O3.9Cl0.1 compared with that of LiMn1.5Ni0.5O4 by the doping of Cl.

AB - LiMn1.5Ni0.5O4 and LiMn 1.5Ni0.5O3.9Cl0.1 are prepared by a solution-based process to investigate the influences of Cl doping on the structural and electrochemical properties of high voltage LiMn 1.5Ni0.5O4 cathode materials for Li-ion batteries. LiMn1.5Ni0.5O3.9Cl0.1 features an improved cyclic performance at 30 C and 55 C compared with LiMn 1.5Ni0.5O4, which originates from the enhanced structural stability by formation of strong Mn-Cl and Ni-Cl bonds revealed by XPS analysis. The improvement in the rate capability of LiMn 1.5Ni0.5O3.9Cl0.1 is attributed to the facilitated Li-ion diffusion in the lattice, due primarily to the larger ionic radius of Cl than that of O. From the GITT analysis, it is revealed that the Li-ion diffusivity of LiMn1.5Ni0.5O 3.9Cl0.1 is improved about 2 times compared with that of LiMn1.5Ni0.5O4. The improved Li-ion diffusivity in the lattice is assigned to the increase in the lattice constant of LiMn 1.5Ni0.5O3.9Cl0.1 compared with that of LiMn1.5Ni0.5O4 by the doping of Cl.

KW - Chlorine doping

KW - High voltage cathode

KW - Li-ion batteries

KW - Li-ion diffusivity

KW - LiMnNiO

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