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<strong>Electrochemical and lithium-ion transport properties of layered Li-rich Li1.10(Ni0.32X0.01Co0.33Mn0.33)O2(X = Dy/Gd/Ho) positive electrodes</strong>

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Title Statement <strong>Electrochemical and lithium-ion transport properties of layered Li-rich Li1.10(Ni0.32X0.01Co0.33Mn0.33)O2(X = Dy/Gd/Ho) positive electrodes</strong>
 
Added Entry - Uncontrolled Name PARTHASARATHI, SENTHIL KUMAR ; National Taiwan University
Ayyasamy, Sakunthala ; Assistant Professor
M.V., Reddy ; 5Centre of Excellence in Transportation Electrification and Energy Storage (CETEES), Hydro-Québec, Canada
R, Prasada Rao
B.V.R, Chowdari
S, Adams
Department of Science and Technology, India
 
Uncontrolled Index Term Materials Science; Solid State Ionics
lithium ion battery; cathode; excess lithium; microwave; rare earth doping
 
Summary, etc. Layer structured Li<sub>1.10</sub>(Ni<sub>0.32</sub>X<sub>0.01</sub>Co<sub>0.33</sub>Mn<sub>0.33</sub>)O<sub>2</sub> (X = Dy/Gd/Ho) compounds were synthesized via the microwave assisted solvothermal route. The impacts of doping on the electrical and electrochemical properties of Li<sub>1.10 </sub>(Ni<sub>0.32</sub>X<sub>0.01</sub>Co<sub>0.33</sub>Mn<sub>0.33</sub>)O<sub>2</sub> compounds were investigated. Rietveld refined XRD pattern showed Li<sub>1.10 </sub>(Ni<sub>0.32</sub>X<sub>0.01</sub>Co<sub>0.33</sub>Mn<sub>0.33</sub>)O<sub>2</sub> compounds with layered hexagonal structure. SEM images revealed the compounds with micrometer sized grains. The Li<sub>1.10 </sub>(Ni<sub>0.33</sub>Co<sub>0.33</sub>Mn<sub>0.33</sub>)O<sub>2 </sub>compound delivered an initial discharge capacity of 197 mAh/g at 0.2C and retained a capacity of 163mAh/g after 50<sup>th</sup> cycle in the voltage window of 2.5-4.6V. The cycling stability of Li<sub>1.10</sub>(Ni<sub>0.33</sub>Co<sub>0.33</sub>Mn<sub>0.33</sub>)O<sub>2 </sub>compound was improved with rare earth doping. Li<sub>1.10</sub>(Ni<sub>0.32</sub>Dy<sub>0.01</sub>Co<sub>0.33</sub>Mn<sub>0.33</sub>)O<sub>2 </sub>compound delivered the discharge capacity of 166 mAh/g after50<sup>th</sup> cycle in the potential window 2.5-4.6V at 0.2C with 100% capacity retention. AC impedance studies displayed the electrical conductivity in the order of 10<sup>-6</sup> S/cm. Wagner polarization analysis revealed the improvement in electronic transference number <em>via</em> rare earth doping.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2020-11-20 15:01:11
 
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Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 58, ##issue.no## 12 (2020): Indian Journal of Pure & Applied Physics
 
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