Electrochemical deintercalation kinetics of 0.5Li2MnO3·0.5LiNi1/3Mn1/3Co1/3O2studied by EIS and PITT

Meng Wang; Min Luo; Yunbo Chen; Yuefeng Su; Lin Chen; Ran Zhang

doi:10.1016/j.jallcom.2016.12.085

Electrochemical deintercalation kinetics of 0.5Li₂MnO₃·0.5LiNi_1/3Mn_1/3Co_1/3O₂studied by EIS and PITT

Meng Wang^*, Min Luo, Yunbo Chen, Yuefeng Su, Lin Chen, Ran Zhang

^*Corresponding author for this work

School of Material Science and Engineering

Academy of Machinery Science and Technology

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

60 Citations (Scopus)

Abstract

The charge transfer resistances (R_ct) and chemical diffusion coefficients of lithium ions (D_Li⁺) in 0.5Li₂MnO₃·0.5LiNi_1/3Mn_1/3Co_1/3O₂at various potentials in the first charge process were systematically tested by EIS and PITT. In the initial stage of the charging process, R_ctgradually decreased to a minimum value of 68.5 Ω at 4.0 V. Then it sharply increased to 977.5 Ω at 4.8 V. The main reason was the activation of Li₂MnO₃component started to decompose to Li₂O and MnO₂at about 4.5 V. The D_Li⁺obtained from EIS and PITT was greatly dependent on the potential and it in the range of 10⁻¹⁶to 10⁻¹² cm²s⁻¹and 10⁻¹⁴to 10⁻¹³ cm² s⁻¹, respectively. The D_Li⁺variation tendency with cell potential obtained from EIS and PITT was consistent with each other and with a maximum value at 4.0 V. The low Li⁺diffusion coefficients was due to the high kinetic barrier associated with oxygen loss, surface and structural rearrangement. The results showed that the kinetic of 0.5Li₂MnO₃·0.5LiNi_1/3Mn_1/3Co_1/3O₂was controlled by lithium-ion diffusion in the low voltage (<4.0 V) and controlled by charge transfer resistance in the high voltage (>4.3 V).

Original language	English
Pages (from-to)	907-913
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	696
DOIs	https://doi.org/10.1016/j.jallcom.2016.12.085
Publication status	Published - 2017

Keywords

Charge transfer resistance
Chemical diffusion coefficients
Electroanalytical techniques
Li-rich material
Lithium-ion battery

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10.1016/j.jallcom.2016.12.085

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@article{10d141e421f84509962d9192e99cafaa,

title = "Electrochemical deintercalation kinetics of 0.5Li2MnO3·0.5LiNi1/3Mn1/3Co1/3O2studied by EIS and PITT",

abstract = "The charge transfer resistances (Rct) and chemical diffusion coefficients of lithium ions (DLi+) in 0.5Li2MnO3·0.5LiNi1/3Mn1/3Co1/3O2at various potentials in the first charge process were systematically tested by EIS and PITT. In the initial stage of the charging process, Rctgradually decreased to a minimum value of 68.5 Ω at 4.0 V. Then it sharply increased to 977.5 Ω at 4.8 V. The main reason was the activation of Li2MnO3component started to decompose to Li2O and MnO2at about 4.5 V. The DLi+obtained from EIS and PITT was greatly dependent on the potential and it in the range of 10−16to 10−12 cm2s−1and 10−14to 10−13 cm2 s−1, respectively. The DLi+variation tendency with cell potential obtained from EIS and PITT was consistent with each other and with a maximum value at 4.0 V. The low Li+diffusion coefficients was due to the high kinetic barrier associated with oxygen loss, surface and structural rearrangement. The results showed that the kinetic of 0.5Li2MnO3·0.5LiNi1/3Mn1/3Co1/3O2was controlled by lithium-ion diffusion in the low voltage (<4.0 V) and controlled by charge transfer resistance in the high voltage (>4.3 V).",

keywords = "Charge transfer resistance, Chemical diffusion coefficients, Electroanalytical techniques, Li-rich material, Lithium-ion battery",

author = "Meng Wang and Min Luo and Yunbo Chen and Yuefeng Su and Lin Chen and Ran Zhang",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2017",

doi = "10.1016/j.jallcom.2016.12.085",

language = "English",

volume = "696",

pages = "907--913",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Electrochemical deintercalation kinetics of 0.5Li2MnO3·0.5LiNi1/3Mn1/3Co1/3O2studied by EIS and PITT

AU - Wang, Meng

AU - Luo, Min

AU - Chen, Yunbo

AU - Su, Yuefeng

AU - Chen, Lin

AU - Zhang, Ran

PY - 2017

Y1 - 2017

N2 - The charge transfer resistances (Rct) and chemical diffusion coefficients of lithium ions (DLi+) in 0.5Li2MnO3·0.5LiNi1/3Mn1/3Co1/3O2at various potentials in the first charge process were systematically tested by EIS and PITT. In the initial stage of the charging process, Rctgradually decreased to a minimum value of 68.5 Ω at 4.0 V. Then it sharply increased to 977.5 Ω at 4.8 V. The main reason was the activation of Li2MnO3component started to decompose to Li2O and MnO2at about 4.5 V. The DLi+obtained from EIS and PITT was greatly dependent on the potential and it in the range of 10−16to 10−12 cm2s−1and 10−14to 10−13 cm2 s−1, respectively. The DLi+variation tendency with cell potential obtained from EIS and PITT was consistent with each other and with a maximum value at 4.0 V. The low Li+diffusion coefficients was due to the high kinetic barrier associated with oxygen loss, surface and structural rearrangement. The results showed that the kinetic of 0.5Li2MnO3·0.5LiNi1/3Mn1/3Co1/3O2was controlled by lithium-ion diffusion in the low voltage (<4.0 V) and controlled by charge transfer resistance in the high voltage (>4.3 V).

AB - The charge transfer resistances (Rct) and chemical diffusion coefficients of lithium ions (DLi+) in 0.5Li2MnO3·0.5LiNi1/3Mn1/3Co1/3O2at various potentials in the first charge process were systematically tested by EIS and PITT. In the initial stage of the charging process, Rctgradually decreased to a minimum value of 68.5 Ω at 4.0 V. Then it sharply increased to 977.5 Ω at 4.8 V. The main reason was the activation of Li2MnO3component started to decompose to Li2O and MnO2at about 4.5 V. The DLi+obtained from EIS and PITT was greatly dependent on the potential and it in the range of 10−16to 10−12 cm2s−1and 10−14to 10−13 cm2 s−1, respectively. The DLi+variation tendency with cell potential obtained from EIS and PITT was consistent with each other and with a maximum value at 4.0 V. The low Li+diffusion coefficients was due to the high kinetic barrier associated with oxygen loss, surface and structural rearrangement. The results showed that the kinetic of 0.5Li2MnO3·0.5LiNi1/3Mn1/3Co1/3O2was controlled by lithium-ion diffusion in the low voltage (<4.0 V) and controlled by charge transfer resistance in the high voltage (>4.3 V).

KW - Charge transfer resistance

KW - Chemical diffusion coefficients

KW - Electroanalytical techniques

KW - Li-rich material

KW - Lithium-ion battery

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DO - 10.1016/j.jallcom.2016.12.085

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AN - SCOPUS:85002593398

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VL - 696

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JO - Journal of Alloys and Compounds

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