Electrochemical performances of Li-rich layered-layered Li2MnO3-LiMnO2 solid solutions as cathode material for lithium-ion batteries

Saroha, Rakesh; Gupta, Amit; Panwar, Amrish K.

doi:10.1016/j.jallcom.2016.11.199

Cited by 61 publications

(25 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Theoretical calculations predict the 7 A u and 11 B u IR active optical modes[27]. We have found 7 peaks for Li 2 MnO 3 which are similar with the reported experimental studies in literature[30]. In Li 2 Mn 0.9 Ru 0.1 O 3 , some Raman peaks merge and total 5 peaks have been observed.…”

supporting

confidence: 88%

Ru doping effect on the structural, electronic, transport, optical and dye degradation properties of layered Li2MnO3

Singh

2020

SN Appl. Sci.

View full text Add to dashboard Cite

Ru doped Li 2 MnO 3 compositions show the presence of redox couples Mn +3-Mn +4 and Ru +4-Ru +5. Due to the presence of these redox couples in Li 2 Mn 1−x Ru x O 3 (x = 0.05, 0.1), Ru doped compositions show (i) change in structure (ii) large decrease in impedance(~ 10 7 to ~ 10 5 Ohm) (iii) degrade methyl orange and methylene blue solution (pH-6) in quick time in presence of tungsten (W) bulb and sun light. Synchrotron X-ray powder diffraction studies show the change in lattice parameters with Ru doping at Mn site in Li 2 Mn 1−x Ru x O 3 (x = 0.05, 0.1). Raman and Infrared spectroscopic studies show the shift in Mn-O stretching mode of Li 2 MnO 3 towards lower wave number with Ru doping. Soft X-ray absorption spectroscopic studies show the presence of mixed valences of Mn +3 , Mn +4 , Ru +4 and Ru +5 in Li 2 Mn 1−x Ru x O 3 (x = 0.05, 0.1) using L 2,3 and M 4 edge. UV-Vis diffuse reflectance spectroscopic studies show the optical band gap in visible light range in Ru doped Li 2 Mn 1−x Ru x O 3 (x = 0.05, 0.1) compositions. The presence of 5 mg of Li 2 Mn 0.9 Ru 0.1 O 3 degrades 5 ml of methyl orange solution (10 mg/L) of pH 6 in 5 min and methylene blue solution (10 mg/L) of pH 6 in 3 min of exposure in W bulb light.

show abstract

supporting

confidence: 88%

Ru doping effect on the structural, electronic, transport, optical and dye degradation properties of layered Li2MnO3

Singh

2020

SN Appl. Sci.

View full text Add to dashboard Cite

show abstract

“…Lithium-ion diffusion coefficient (D Li + ) deposited electrode was calculated from Equation (1), using the extracted Warburg impedance coefficients (s W ) from Equation (2): [46][47][48] …”

Section: Electrochemical Impedance Spectroscopy Analysismentioning

confidence: 99%

Electrophoretic Deposition for Lithium‐Ion Battery Electrode Manufacture

Lalau

Low

2019

Batteries & Supercaps

View full text Add to dashboard Cite

Electrophoretic deposition (EPD) has received increasing attention as an alternative manufacturing approach to slurry casting for the production of battery and supercapacitor electrodes. This process is of relevance for industrial scalability as evidently seen in the current electrophoretic paints industry. Nevertheless, the reported work so far have only concentrated on thin films of electrophoretically deposited electrodes for energy storage. Here, the electrochemical performance of thick films (up to tens of μm) as lithium‐ion battery electrodes produced by EPD is reported. A commercially sourced LiN1/3M1/3C1/3O2 (5 to 25 μm particle size) was used in this exemplary investigation. This work shows the production of binder‐free high density active material (>90 %) electrodes. Coin cells were assembled and the battery performance was measured. Tests included: cyclic voltammetry, C‐rate vs capacity, battery cycling and electrochemical impedance spectroscopy. Other investigations also studied: colloidal electrolyte formulation, electrode manufacture, microstructure characterisation and elemental mapping analysis. In short, EPD electrode manufacture can be applied as a platform technology for any battery and supercapacitor material, and the reported manufacturing processes and methodologies represent direct relevance to produce energy storage electrodes useful to practical applications.

show abstract

“…Stabilization of the layered structure can be obtained by partially substituting Mn ions by antiferromagnetic elements such as Al or Cr. 54,55 61,62 Investigation of the local structure upon charging suggested the disappearance of Li + located in the transition metal layer very early during the rst charge. 63 Li + migrates to the tetrahedral sites that share faces with vacant octahedral sites in the transition metal layer.…”

Section: Layered Transition Metal Oxides Positive Electrode Materialsmentioning

confidence: 99%

Recent advances in the design of cathode materials for Li-ion batteries

2020

View full text Add to dashboard Cite

show abstract

Electrochemical performances of Li-rich layered-layered Li2MnO3-LiMnO2 solid solutions as cathode material for lithium-ion batteries

Cited by 61 publications

References 39 publications

Ru doping effect on the structural, electronic, transport, optical and dye degradation properties of layered Li2MnO3

Ru doping effect on the structural, electronic, transport, optical and dye degradation properties of layered Li2MnO3

Electrophoretic Deposition for Lithium‐Ion Battery Electrode Manufacture

Recent advances in the design of cathode materials for Li-ion batteries

Contact Info

Product

Resources

About