Dielectric and conduction mechanism studies of Ni doped LiMn2O4 synthesized by solution combustion method

Pugazhendhi, Anbarasi; Ellappan, Satheeshkumar; Kumaresan, Ilango; Paramasivam, Manohar

doi:10.1007/s11581-018-2560-0

Cited by 5 publications

(3 citation statements)

References 49 publications

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“…At low frequency, the polarization of small-polaron hopping and localized transport of Li ions can be synchronized with the sharp variation of the alternating electric field. At mid-frequency and high-frequency stages, the polarization of localized transport of Li ions and small polarons cannot be synchronized with the periodic variation of the alternating electric field, resulting in the decline in values of dielectric permittivity and becoming a constant at higher frequency. ,,− In addition, as temperature increases, ε′ gradually increases, which indicates the thermally activated process.…”

Section: Resultsmentioning

confidence: 99%

“…Nowadays, Li-ion batteries (LIBs) with high energy density and high operating voltage are essential for large-scale applications, e.g., power portable electronic devices, electric vehicles (EVs), and hybrid electric vehicles (HEVs). − Spinel LiMn 2 O 4 (LMO) materials have been considered as the most promising replacement for LiCoO 2 in LIB applications because of their advantages of low cost, environmental friendliness, high rechargeable capacity, and easy fabrication. − …”

Section: Introductionmentioning

confidence: 99%

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Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn₂O₄

Zheng

Wang

et al. 2020

J. Phys. Chem. C

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Investigation of lithium ion transport between different crystallographic sites in different phase structures has been regarded as a challenging diffraction issue. In this work, isothermal dielectric spectroscopy and the electric modulus of LiMn 2 O 4 (LMO) were adopted to reveal Li-ion transport behavior. Dielectric and electric modulus spectra show three thermally activated processes: (i) enhanced mid-frequency dielectric permittivity above 133 K contributed by the short-range migration of Li ions, (ii) high-frequency dielectric relaxation associated with hopping of small polarons, and (iii) low-frequency giant dielectric loss (dc conductivity) caused by the long-range migration of Li ions at high temperature. In addition, an obvious change of dielectric permittivity around 280 K happens at structural transition from cubic to tetragonal of LMO. Furthermore, it was found that the short-range mobility of Li ions and hopping of small polarons lead to the variation of β in the Kohlrausch−Williams−Watts (KWW) function of the electric modulus. Thus, our work provides a revealing insight into the electrical transport mechanism and migration dynamics of Li ions in LMO.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn₂O₄

Zheng

Wang

et al. 2020

J. Phys. Chem. C

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“…One of the main reasons is the accelerating dissolution of Mn 2+ into the liquid electrolyte at high temperature . To solve this problem, great work have been done, such as doping, coating, electrolyte additives et al . However, further work is still needed to address the issue.…”

Section: Introductionmentioning

confidence: 99%

High Voltage, Flexible and Low Cost All‐Solid‐State Lithium Metal Batteries with a Wide Working Temperature Range

Zhang

Fei

et al. 2020

ChemistrySelect

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In this work, a flexible 4 V all-solid-state lithium metal battery is reported. In this battery, polyvinylidene fluoride (PVDF)/ Li 6.40 La 3 Zr 1.40 Ta 0.60 O 12 (LLZTO) composite electrolyte is used as the electrolyte and low cost LiMn 2 O 4 (LMO) is used as the cathode. It is found that this all-solid-state battery can work from room temperature to 80°C. At 80°C, a capacity retention of 78.8% is obtained after 50 cycles while battery with liquid electrolyte last only one cycle. Further researches discover that liquid electrolyte react continuously with LMO while the solidstate electrolyte is stable with LMO at high temperature. These results may be useful for the developing of low cost, high energy and high safety batteries system.

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Temperature dependent electrical properties of YSZ synthesized through microwave combustion

et al. 2020

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Dielectric and conduction mechanism studies of Ni doped LiMn2O4 synthesized by solution combustion method

Cited by 5 publications

References 49 publications

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn₂O₄

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn₂O₄

High Voltage, Flexible and Low Cost All‐Solid‐State Lithium Metal Batteries with a Wide Working Temperature Range

Temperature dependent electrical properties of YSZ synthesized through microwave combustion

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Dielectric and conduction mechanism studies of Ni doped LiMn2O4 synthesized by solution combustion method

Cited by 5 publications

References 49 publications

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn2O4

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn2O4

High Voltage, Flexible and Low Cost All‐Solid‐State Lithium Metal Batteries with a Wide Working Temperature Range

Temperature dependent electrical properties of YSZ synthesized through microwave combustion

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Product

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Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn₂O₄

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn₂O₄