Evaluation of electrochemical performance and redox activity of Fe in Ti doped layered P2-Na0.67Mn0.5Fe0.5O2 cathode for sodium ion batteries

Darbar, Devendrasinh; Muralidharan, Nitin; Hermann, Raphael P.; Nanda, Jagjit; Bhattacharya, Indranil

doi:10.1016/j.electacta.2021.138156

Title: Evaluation of electrochemical performance and redox activity of Fe in Ti doped layered P2-Na0.67Mn0.5Fe0.5O2 cathode for sodium ion batteries

Abstract

Here, we report a wet synthesis-based titanium doping strategy to improve the structural stability and electrochemical performances, such as cycling stability and rate capability, of P2-type Na_0.67Fe_0.5Mn_0.5O₂ layered oxide cathodes. Through Ti⁴⁺ doping aimed at replacing some of the Mn and Fe atoms in the crystal structure, effective mitigation of the Jahn Teller distortion caused by active Mn³⁺ before charging and Fe⁴⁺ after charging was achieved. X-ray diffraction (XRD), Raman spectroscopy, Electrochemical Impedance Spectroscopy (EIS) and Mössbauer spectroscopy were used to investigate the effects of the Ti⁴⁺ dopant before and after cycling. It was observed that Ti⁴⁺ doping increased the Na layer thickness, minimized the lattice volume strain, showed better structural stability, minimally decreased Fe migration to the Na layer, and lowered charge transfer resistance in these P2-type cathodes. Overall, our reported synthesis methodology and electrochemical characterizations highlight the feasibility of Ti doping in sodium layered oxide P2-type cathodes.

Authors:

^[1];

^[2];

^[2]; Bhattacharya, Indranil ^[3]

Tennessee Technological Univ., Cookeville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Tennessee Technological Univ., Cookeville, TN (United States)

Publication Date:: Wed Mar 17 00:00:00 EDT 2021

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Electricity (OE); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; Tennessee Valley Authority (TVA)

OSTI Identifier:: 1786285

Grant/Contract Number:: AC05-00OR22725; 5315627

Resource Type:: Accepted Manuscript

Journal Name:: Electrochimica Acta

Additional Journal Information:: Journal Volume: 380; Journal ID: ISSN 0013-4686

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 25 ENERGY STORAGE

Citation Formats


                    Darbar, Devendrasinh, Muralidharan, Nitin, Hermann, Raphael P., Nanda, Jagjit, and Bhattacharya, Indranil. Evaluation of electrochemical performance and redox activity of Fe in Ti doped layered P2-Na0.67Mn0.5Fe0.5O2 cathode for sodium ion batteries.  United States: N. p., 2021. 
Web.  doi:10.1016/j.electacta.2021.138156.

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                    Darbar, Devendrasinh, Muralidharan, Nitin, Hermann, Raphael P., Nanda, Jagjit, & Bhattacharya, Indranil. Evaluation of electrochemical performance and redox activity of Fe in Ti doped layered P2-Na0.67Mn0.5Fe0.5O2 cathode for sodium ion batteries.  United States.  https://doi.org/10.1016/j.electacta.2021.138156

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                    Darbar, Devendrasinh, Muralidharan, Nitin, Hermann, Raphael P., Nanda, Jagjit, and Bhattacharya, Indranil. Wed .  
"Evaluation of electrochemical performance and redox activity of Fe in Ti doped layered P2-Na0.67Mn0.5Fe0.5O2 cathode for sodium ion batteries".  United States.  https://doi.org/10.1016/j.electacta.2021.138156.  https://www.osti.gov/servlets/purl/1786285.

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@article{osti_1786285,

  title        = {Evaluation of electrochemical performance and redox activity of Fe in Ti doped layered P2-Na0.67Mn0.5Fe0.5O2 cathode for sodium ion batteries},

  author       = {Darbar, Devendrasinh and Muralidharan, Nitin and Hermann, Raphael P. and Nanda, Jagjit and Bhattacharya, Indranil},

  abstractNote = {Here, we report a wet synthesis-based titanium doping strategy to improve the structural stability and electrochemical performances, such as cycling stability and rate capability, of P2-type Na0.67Fe0.5Mn0.5O2 layered oxide cathodes. Through Ti4+ doping aimed at replacing some of the Mn and Fe atoms in the crystal structure, effective mitigation of the Jahn Teller distortion caused by active Mn3+ before charging and Fe4+ after charging was achieved. X-ray diffraction (XRD), Raman spectroscopy, Electrochemical Impedance Spectroscopy (EIS) and Mössbauer spectroscopy were used to investigate the effects of the Ti4+ dopant before and after cycling. It was observed that Ti4+ doping increased the Na layer thickness, minimized the lattice volume strain, showed better structural stability, minimally decreased Fe migration to the Na layer, and lowered charge transfer resistance in these P2-type cathodes. Overall, our reported synthesis methodology and electrochemical characterizations highlight the feasibility of Ti doping in sodium layered oxide P2-type cathodes.},

  doi          = {10.1016/j.electacta.2021.138156},

  journal      = {Electrochimica Acta},

  number       = ,

  volume       = 380,

  place        = {United States},

  year         = {Wed Mar 17 00:00:00 EDT 2021},

  month        = {Wed Mar 17 00:00:00 EDT 2021}

}

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Title: Evaluation of electrochemical performance and redox activity of Fe in Ti doped layered P2-Na0.67Mn0.5Fe0.5O2 cathode for sodium ion batteries

Abstract

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Characterization of a thin, uniform coating on P2-type Na _2/3 Fe _1/2 Mn _1/2 O ₂ cathode material for sodium-ion batteries
journal, January 2015

Structure of the high voltage phase of layered P2-Na _2/3−z [Mn _1/2 Fe _1/2 ]O ₂ and the positive effect of Ni substitution on its stability
journal, January 2015

Structure and Electrochemistry of Na _x Fe _x Ti _1-x O ₂ (1.0 ≥ x ≥ 0.75) for Na-Ion Battery Positive Electrodes
journal, January 2014