Structural and electrochemical properties of Co-Mn-Mg multi-doped nickel based cathode materials LiNi0.9Co0.1-x[Mn 1/2Mg1/2]xO2 for secondary lithium ion batteries

Qiang Liu; Ke Du; Hongwei Guo; Zhong Dong Peng; Yan Bing Cao; Guo Rong Hu

doi:10.1016/j.electacta.2012.12.071

Structural and electrochemical properties of Co-Mn-Mg multi-doped nickel based cathode materials LiNi_0.9Co_0.1-x[Mn _1/2Mg_1/2]_xO₂ for secondary lithium ion batteries

Qiang Liu, Ke Du, Hongwei Guo, Zhong Dong Peng, Yan Bing Cao, Guo Rong Hu

Research output: Journal article publication › Journal article › Academic research › peer-review

61 Citations (Scopus)

Abstract

Co, Mn and Mg co-doped lithium nickel oxides of the nominal composition LiNi_0.9Co_0.1-x[Mn_1/2Mg_1/2] _xO₂ (x = 0.00, 0.02, 0.04, 0.06) are synthesized by a co-precipitation technique and solid state route. XPS results reveal that the oxidation states of Ni, Co, Mn and Mg are +3, +3, +4 and +2, respectively. An ordered α-NaFeO₂ rock salt structure with R-3̄m symmetry has been confirmed by XRD. The cation mixing of Li/Ni and occupation of Mg ions have been analyzed by Rieveld refinement. Mg ions distribute between 3b and 3a sites in the crystal. Meanwhile a substantial reduction of cation mixing of Li-Ni has been confirmed by Mn-Mg substitution. Better cycling performance is observed in the compound with high Mn-Mg content compared with LiNi _0.9Co_0.1O₂. Mn-Mg substitution for Co has been shown to suppress the increase of the cell impedance during cycles effectively.

Original language	English
Pages (from-to)	350-357
Number of pages	8
Journal	Electrochimica Acta
Volume	90
DOIs	https://doi.org/10.1016/j.electacta.2012.12.071
Publication status	Published - 15 Feb 2013
Externally published	Yes

Keywords

Co, Mn and Mg multi-doping
Electrochemical study
Ni-based layered cathode
Structural study

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

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This output contributes to the following UN Sustainable Development Goals (SDGs)

More information

10.1016/j.electacta.2012.12.071

Cite this

@article{35f4e6bb72f74efc9e571c823b125fb3,

title = "Structural and electrochemical properties of Co-Mn-Mg multi-doped nickel based cathode materials LiNi0.9Co0.1-x[Mn 1/2Mg1/2]xO2 for secondary lithium ion batteries",

abstract = "Co, Mn and Mg co-doped lithium nickel oxides of the nominal composition LiNi0.9Co0.1-x[Mn1/2Mg1/2] xO2 (x = 0.00, 0.02, 0.04, 0.06) are synthesized by a co-precipitation technique and solid state route. XPS results reveal that the oxidation states of Ni, Co, Mn and Mg are +3, +3, +4 and +2, respectively. An ordered α-NaFeO2 rock salt structure with R-{\=3}m symmetry has been confirmed by XRD. The cation mixing of Li/Ni and occupation of Mg ions have been analyzed by Rieveld refinement. Mg ions distribute between 3b and 3a sites in the crystal. Meanwhile a substantial reduction of cation mixing of Li-Ni has been confirmed by Mn-Mg substitution. Better cycling performance is observed in the compound with high Mn-Mg content compared with LiNi 0.9Co0.1O2. Mn-Mg substitution for Co has been shown to suppress the increase of the cell impedance during cycles effectively.",

keywords = "Co, Mn and Mg multi-doping, Electrochemical study, Ni-based layered cathode, Structural study",

author = "Qiang Liu and Ke Du and Hongwei Guo and Peng, {Zhong Dong} and Cao, {Yan Bing} and Hu, {Guo Rong}",

year = "2013",

month = feb,

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doi = "10.1016/j.electacta.2012.12.071",

language = "English",

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TY - JOUR

T1 - Structural and electrochemical properties of Co-Mn-Mg multi-doped nickel based cathode materials LiNi0.9Co0.1-x[Mn 1/2Mg1/2]xO2 for secondary lithium ion batteries

AU - Liu, Qiang

AU - Du, Ke

AU - Guo, Hongwei

AU - Peng, Zhong Dong

AU - Cao, Yan Bing

AU - Hu, Guo Rong

PY - 2013/2/15

Y1 - 2013/2/15

N2 - Co, Mn and Mg co-doped lithium nickel oxides of the nominal composition LiNi0.9Co0.1-x[Mn1/2Mg1/2] xO2 (x = 0.00, 0.02, 0.04, 0.06) are synthesized by a co-precipitation technique and solid state route. XPS results reveal that the oxidation states of Ni, Co, Mn and Mg are +3, +3, +4 and +2, respectively. An ordered α-NaFeO2 rock salt structure with R-3̄m symmetry has been confirmed by XRD. The cation mixing of Li/Ni and occupation of Mg ions have been analyzed by Rieveld refinement. Mg ions distribute between 3b and 3a sites in the crystal. Meanwhile a substantial reduction of cation mixing of Li-Ni has been confirmed by Mn-Mg substitution. Better cycling performance is observed in the compound with high Mn-Mg content compared with LiNi 0.9Co0.1O2. Mn-Mg substitution for Co has been shown to suppress the increase of the cell impedance during cycles effectively.

AB - Co, Mn and Mg co-doped lithium nickel oxides of the nominal composition LiNi0.9Co0.1-x[Mn1/2Mg1/2] xO2 (x = 0.00, 0.02, 0.04, 0.06) are synthesized by a co-precipitation technique and solid state route. XPS results reveal that the oxidation states of Ni, Co, Mn and Mg are +3, +3, +4 and +2, respectively. An ordered α-NaFeO2 rock salt structure with R-3̄m symmetry has been confirmed by XRD. The cation mixing of Li/Ni and occupation of Mg ions have been analyzed by Rieveld refinement. Mg ions distribute between 3b and 3a sites in the crystal. Meanwhile a substantial reduction of cation mixing of Li-Ni has been confirmed by Mn-Mg substitution. Better cycling performance is observed in the compound with high Mn-Mg content compared with LiNi 0.9Co0.1O2. Mn-Mg substitution for Co has been shown to suppress the increase of the cell impedance during cycles effectively.

KW - Co, Mn and Mg multi-doping

KW - Electrochemical study

KW - Ni-based layered cathode

KW - Structural study

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