Effects of Li and Cl codoping on the electrochemical performance and structural stability of LiMn2O4 cathode materials for hybrid electric vehicle applications

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

doi:10.1021/jp310011m

Effects of Li and Cl codoping on the electrochemical performance and structural stability of LiMn₂O₄ cathode materials for hybrid electric vehicle applications

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

Dept. of Future Energy Convergence

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

46 Scopus citations

Abstract

LiMn₂O₄, Li_1.05Mn_1.95O ₄, and Li_1.05Mn_1.95O_3.95Cl _0.05 are prepared by a solution-based process to investigate the influences of codoping of Li and Cl on the electrochemical performance and structural stability of Li_1+xMn_2-xO_4-yCl _y (x, y = 0, 0.05). Li_1.05Mn_1.95O _3.95Cl_0.05 features an improved cycling performance and rate capability compared with LiMn₂O₄ and Li _1.05Mn_1.95O₄, which originate from the improved structural stability and the reduction in Mn dissolution into electrolyte by the codoping of Li and Cl. The improvement in the cycling performance of Li _1.05Mn_1.95O_3.95Cl_0.05 is more appreciable at a higher temperature. Further, the electrode resistance of Li_1.05Mn_1.95O_3.95Cl_0.05 is much lower than that of LiMn₂O₄ over the first charge, suggesting that LiMn₂O₄ with high electrode resistance is structurally unstable during cycling. Both the suppressed Mn dissolution and the reduced electrode resistance of Li_1.05Mn_1.95O _3.95Cl_0.05 are attributed to the reinforcement of MnO ₆ octahedral in Li_1.05Mn_1.95O _3.95Cl_0.05 framework by the strong ionic Mn-Cl bonds formed by the codoping of Li and Cl.

Original language	English
Pages (from-to)	4913-4919
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	117
Issue number	10
DOIs	https://doi.org/10.1021/jp310011m
State	Published - 14 Mar 2013

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@article{6a1825bd300f4413ac4c90c3ccf717d3,

title = "Effects of Li and Cl codoping on the electrochemical performance and structural stability of LiMn2O4 cathode materials for hybrid electric vehicle applications",

abstract = "LiMn2O4, Li1.05Mn1.95O 4, and Li1.05Mn1.95O3.95Cl 0.05 are prepared by a solution-based process to investigate the influences of codoping of Li and Cl on the electrochemical performance and structural stability of Li1+xMn2-xO4-yCl y (x, y = 0, 0.05). Li1.05Mn1.95O 3.95Cl0.05 features an improved cycling performance and rate capability compared with LiMn2O4 and Li 1.05Mn1.95O4, which originate from the improved structural stability and the reduction in Mn dissolution into electrolyte by the codoping of Li and Cl. The improvement in the cycling performance of Li 1.05Mn1.95O3.95Cl0.05 is more appreciable at a higher temperature. Further, the electrode resistance of Li1.05Mn1.95O3.95Cl0.05 is much lower than that of LiMn2O4 over the first charge, suggesting that LiMn2O4 with high electrode resistance is structurally unstable during cycling. Both the suppressed Mn dissolution and the reduced electrode resistance of Li1.05Mn1.95O 3.95Cl0.05 are attributed to the reinforcement of MnO 6 octahedral in Li1.05Mn1.95O 3.95Cl0.05 framework by the strong ionic Mn-Cl bonds formed by the codoping of Li and Cl.",

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

year = "2013",

month = mar,

day = "14",

doi = "10.1021/jp310011m",

language = "English",

volume = "117",

pages = "4913--4919",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

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}

TY - JOUR

T1 - Effects of Li and Cl codoping on the electrochemical performance and structural stability of LiMn2O4 cathode materials for hybrid electric vehicle applications

AU - Han, Dong Wook

AU - Ryu, Won Hee

AU - Kim, Won Keun

AU - Eom, Ji Yong

AU - Kwon, Hyuk Sang

PY - 2013/3/14

Y1 - 2013/3/14

N2 - LiMn2O4, Li1.05Mn1.95O 4, and Li1.05Mn1.95O3.95Cl 0.05 are prepared by a solution-based process to investigate the influences of codoping of Li and Cl on the electrochemical performance and structural stability of Li1+xMn2-xO4-yCl y (x, y = 0, 0.05). Li1.05Mn1.95O 3.95Cl0.05 features an improved cycling performance and rate capability compared with LiMn2O4 and Li 1.05Mn1.95O4, which originate from the improved structural stability and the reduction in Mn dissolution into electrolyte by the codoping of Li and Cl. The improvement in the cycling performance of Li 1.05Mn1.95O3.95Cl0.05 is more appreciable at a higher temperature. Further, the electrode resistance of Li1.05Mn1.95O3.95Cl0.05 is much lower than that of LiMn2O4 over the first charge, suggesting that LiMn2O4 with high electrode resistance is structurally unstable during cycling. Both the suppressed Mn dissolution and the reduced electrode resistance of Li1.05Mn1.95O 3.95Cl0.05 are attributed to the reinforcement of MnO 6 octahedral in Li1.05Mn1.95O 3.95Cl0.05 framework by the strong ionic Mn-Cl bonds formed by the codoping of Li and Cl.

AB - LiMn2O4, Li1.05Mn1.95O 4, and Li1.05Mn1.95O3.95Cl 0.05 are prepared by a solution-based process to investigate the influences of codoping of Li and Cl on the electrochemical performance and structural stability of Li1+xMn2-xO4-yCl y (x, y = 0, 0.05). Li1.05Mn1.95O 3.95Cl0.05 features an improved cycling performance and rate capability compared with LiMn2O4 and Li 1.05Mn1.95O4, which originate from the improved structural stability and the reduction in Mn dissolution into electrolyte by the codoping of Li and Cl. The improvement in the cycling performance of Li 1.05Mn1.95O3.95Cl0.05 is more appreciable at a higher temperature. Further, the electrode resistance of Li1.05Mn1.95O3.95Cl0.05 is much lower than that of LiMn2O4 over the first charge, suggesting that LiMn2O4 with high electrode resistance is structurally unstable during cycling. Both the suppressed Mn dissolution and the reduced electrode resistance of Li1.05Mn1.95O 3.95Cl0.05 are attributed to the reinforcement of MnO 6 octahedral in Li1.05Mn1.95O 3.95Cl0.05 framework by the strong ionic Mn-Cl bonds formed by the codoping of Li and Cl.

UR - https://www.scopus.com/pages/publications/84875203090

U2 - 10.1021/jp310011m

DO - 10.1021/jp310011m

M3 - Article

AN - SCOPUS:84875203090

SN - 1932-7447

VL - 117

SP - 4913

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 10

ER -

Effects of Li and Cl codoping on the electrochemical performance and structural stability of LiMn₂O₄ cathode materials for hybrid electric vehicle applications

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