Structure and electrical properties of lithium nickel manganese oxide (LiNi0.5Mn0.5O2) prepared by P123 assisted hydrothermal route

Sakunthala, A.; Prabu, M.; Reddy, M. V.; Joshi, Rajeev

doi:10.1016/j.ssi.2014.09.002

Cited by 38 publications

(16 citation statements)

References 62 publications

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“…23,24 Figure 5a represents the complex impedance plot for LVO-P, LVO-WP, LiZr 0.01 V 2.99 O 8 , LiSn 0.05 V 2.95 O 8 , and LiFe 0.01 V 2.99 O 8 taken at room temperature (303 K) in the frequency range of 42 Hz to 1 MHz. The Nyquist plot shows the overlapping of two semicircles related to the parallel combination of a resistor and a capacitor.…”

Section: Resultsmentioning

confidence: 99%

“…High-frequency semicircle is attributed to the grain, and low-frequency semicircle is related to the grain boundary effect. 23 The bulk resistance ( R b ) of the sample was calculated by the intercept of the high-frequency semicircle on the x-axis. The electrical conductivity was calculated using the conductivity formula σ = l / R b A , where “ l ” and “ A ” are the thickness and area of the pellet, respectively (Table 2) and the values were verified with the conductivity values calculated from the mid-frequency plateau region in the conductivity spectra (Figure S2).…”

Section: Resultsmentioning

confidence: 99%

“…23,24 The change in current ( I ) was measured by applying a steady dc potential of 50 mV across the pellets. It was found that the initial conductivity values calculated from the observed current was decreasing with increasing time, before getting saturated.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, our group reported on the correlation between the electrical and electrochemical performance of the cathode materials, LiNi 0.5 Mn 0.5 O 2 and LiNi 1/3 Co 1/3 Mn 1/3 O 2 . 23,24 In the present work, lithium trivanadate and LiV 3– x M x O 8 (M = Zn/Co/Fe/Sn/Ti/Zr/Nb/Mo) compounds with dopants of different oxidation states were prepared at different levels of doping x = 0.01/0.05/0.1 M. The changes in the electrical properties of the compound upon doping were explored. The materials were prepared by a very simple and cost-effective Pluronic P123-assisted reflux method.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Electrical Conductivity on the Electrochemical Performances of Layered Structure Lithium Trivanadate (LiV_3–xM_xO₈, M= Zn/Co/Fe/Sn/Ti/Zr/Nb/Mo, x = 0.01–0.1) as Cathode Materials for Energy Storage

et al. 2018

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Pristine trivanadate (LiV3O8) and doped lithium trivanadate (LiV3–xMxO8, M = Zn/Co/Fe/Sn/Ti/Zr/Nb/Mo, x = 0.01/0.05/0.1 M) compounds were prepared by a simple reflux method in the presence of the polymer, Pluronic P123, as the chelating agent. For comparison, pristine LiV3O8 alone was also prepared in the absence of the chelating agent. The Rietveld-refined X-ray diffraction patterns shows all compounds to exist in the layered monoclinic LiV3O8 phase belonging to the space group of P21/m. Scanning electron microscopy analysis shows the particles to exhibit layers of submicron-sized particles. The electrochemical performances of the coin cells were compared at a current density of 30 mA/g in the voltage window of 2–4 V. The cells made with compounds LiV2.99Zr0.01O8 and LiV2.95Sn0.05O8 show a high discharge capacity of 245 ± 5 mA h/g, with an excellent stability of 98% at the end of the 50th cycle. The second cycle discharge capacity of 398 mA h/g was obtained for the compound LiV2.99Fe0.01O8, and its capacity retention was found to be 58% after 50 cycles. The electrochemical performances of the cells were correlated with the electrical properties and the changes in the structural parameters of the compounds.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of Electrical Conductivity on the Electrochemical Performances of Layered Structure Lithium Trivanadate (LiV_3–xM_xO₈, M= Zn/Co/Fe/Sn/Ti/Zr/Nb/Mo, x = 0.01–0.1) as Cathode Materials for Energy Storage

et al. 2018

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“…3. The FT-IR spectra show the local structure of the oxide lattice constituted by LiO 6 and MO 6 octahedral [37]. The peaks at 512 and 615 cm −1 are the bending modes of Ni-O in MO 6 , and the band at around 431 cm −1 can be assigned to the asymmetric stretching of Li-O in LiO 6 environments [38,39].…”

Section: Ft-ir Analysismentioning

confidence: 98%

Structural and conductivity studies of LiNi_0.5Mn_0.5O₂cathode materials for lithium-ion batteries

Murali

Babu

Veeraiah

2016

Materials Science-Poland

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Layered oxide LiMO 2 (Ni, Co, Mn) have been proposed as cathode materials for lithium-ion batteries. Mainly LiNiO 2 is accepted as an attractive cathode material because of its various advantages such as low cost, high discharge capacity, good reversibility. The LiNi 0.5 Mn 0.5 O 2 powders are synthesized by a sol-gel method using citric acid as a chelating agent. The structure of the synthesized material is analyzed by using XRD, FT-IR and the microstructures of the samples are observed by using FESEM. The intensities and positions of the peaks are in a good agreement with the previous results. The morphological changes are clearly observed as a result of manganese substitution. The Fourier transform infrared (FT-IR) spectra obtained with KBr pellet data reveal the structure of the oxide lattice constituted by LiO 6 and NiO 6 octahedra. The conductivity studies are characterized by (EIS) in the frequency range of 42 Hz to 1 MHz at room temperature to 120°C. The dielectric properties are analyzed in the framework of complex dielectric permittivity and complex electric modulus formalisms. It indicates that the conductivity increases with increasing temperature. The fitting data of EIS plots replicate the non-Debye relaxation process with negative temperature coefficient of resistance (NTCR) behavior.

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Utilization of symmetric electrode materials in energy storage application: A review

Moossa

Abraham

Kahraman

et al. 2022

Intl J of Energy Research

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The development of efficient energy storage systems is an important field of research in the modern era where fossil fuels are headed toward depletion. The invention of batteries is regarded as one of the most significant advancements in the field of energy storage. From its inception, a lot of research has been done and is still being carried out to develop novel and advanced materials that provide improved performance in terms of capacity, stability, and cost. In this context, symmetric or bipolar electrodes, which utilize the same material for the anode and the cathode, emerge as a suitable solution for battery technology. In this work, different types of symmetric electrode materials for batteries are subjected to review. The various structures, methods of synthesis, and characteristics are analyzed and presented. The Na 3 V 2 (PO 4 ) 3 (NVP) is the most widely analyzed symmetric material among all the symmetric materials. The Na-based systems are widely studied in symmetric configurations for their resource availability and price economics advantages. Aqueous and solid-state symmetric batteries are the emerging systems in symmetric batteries. This review will provide insights to battery researchers involved in bipolar material design and shed light on new emerging energy storage techniques.

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Structure and electrical properties of lithium nickel manganese oxide (LiNi0.5Mn0.5O2) prepared by P123 assisted hydrothermal route

Cited by 38 publications

References 62 publications

Impact of Electrical Conductivity on the Electrochemical Performances of Layered Structure Lithium Trivanadate (LiV_3–xM_xO₈, M= Zn/Co/Fe/Sn/Ti/Zr/Nb/Mo, x = 0.01–0.1) as Cathode Materials for Energy Storage

Impact of Electrical Conductivity on the Electrochemical Performances of Layered Structure Lithium Trivanadate (LiV_3–xM_xO₈, M= Zn/Co/Fe/Sn/Ti/Zr/Nb/Mo, x = 0.01–0.1) as Cathode Materials for Energy Storage

Structural and conductivity studies of LiNi_0.5Mn_0.5O₂cathode materials for lithium-ion batteries

Utilization of symmetric electrode materials in energy storage application: A review

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Structure and electrical properties of lithium nickel manganese oxide (LiNi0.5Mn0.5O2) prepared by P123 assisted hydrothermal route

Cited by 38 publications

References 62 publications

Impact of Electrical Conductivity on the Electrochemical Performances of Layered Structure Lithium Trivanadate (LiV3–xMxO8, M= Zn/Co/Fe/Sn/Ti/Zr/Nb/Mo, x = 0.01–0.1) as Cathode Materials for Energy Storage

Impact of Electrical Conductivity on the Electrochemical Performances of Layered Structure Lithium Trivanadate (LiV3–xMxO8, M= Zn/Co/Fe/Sn/Ti/Zr/Nb/Mo, x = 0.01–0.1) as Cathode Materials for Energy Storage

Structural and conductivity studies of LiNi0.5Mn0.5O2cathode materials for lithium-ion batteries

Utilization of symmetric electrode materials in energy storage application: A review

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Impact of Electrical Conductivity on the Electrochemical Performances of Layered Structure Lithium Trivanadate (LiV_3–xM_xO₈, M= Zn/Co/Fe/Sn/Ti/Zr/Nb/Mo, x = 0.01–0.1) as Cathode Materials for Energy Storage

Impact of Electrical Conductivity on the Electrochemical Performances of Layered Structure Lithium Trivanadate (LiV_3–xM_xO₈, M= Zn/Co/Fe/Sn/Ti/Zr/Nb/Mo, x = 0.01–0.1) as Cathode Materials for Energy Storage

Structural and conductivity studies of LiNi_0.5Mn_0.5O₂cathode materials for lithium-ion batteries