AC Impedance Study of PMMA‐LiNO<sub>3</sub> Electrolyte

Shamrao, Patil Vilas; Vithya, K.; Premalatha, M.; Sundaresan, B.

doi:10.1002/masy.201800187

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…The impedance of pure PU measured above to 10 4 Ω at 1MHz and the impedance of Parylene C measured about 10 3 Ω at 0.1 MHz and see the frequency and impedance are inversely proportional (Kim & Cho, 2012;Chun et al, 2014). We can see the impedance of PMMA based doped conductive materials are about 10 6 Ω range at MHz frequencies (Shamrao et al, 2019). In our study, the impedance value of samples at 1 MHz are 0.07 and 0.09 MΩ band for all measurements.…”

Section: Resultssupporting

confidence: 52%

Frequency Dependent Negative Dielectric Behavior in Parylene C Based Composite Films

Guduloglu,

Kurnaz,

Seydioglu

et al. 2024

JAASCI

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Dielectric materials are an important research topic for many applications today. Polymers are among the prominent dielectrics due to their durability, high ionic conductivity and low dielectric losses. This study investigates the dielectric properties of Parylene C (PAC)-based composite films. Capacitance and dissipation factor values are measured. Dielectric permittivity and losses are calculated. Negative capacitance and negative dielectric constant are observed, and resonant frequency values are compared. Activated carbon doping significantly impacts the resonant frequencies of the films. Doped samples exhibit higher positive and negative resonant frequencies (2.2560 MHz and 2.2593 MHz) compared to undoped counterparts (2.1952 MHz and 2.2015 MHz). Polarization further increases resonant frequencies, alongside dielectric permittivity and dissipation factor with permittivity experiencing a more pronounced increase. Post-polarization, doped samples display resonant frequencies of 2.3727 MHz and 2.3761 MHz, while undoped samples reach 2.3658 MHz and 2.3727 MHz. A comprehensive analysis of impedance, resistance, and reactance values reveals insights into the composite film's behavior. Crucially, throughout the measurements, the composite films display a consistent inductive response at frequencies above their resonance frequencies. Understanding the mechanisms behind this inductive response could open up new possibilities for the use of these films in advanced electronic devices and circuits.

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Section: Resultssupporting

confidence: 52%

Frequency Dependent Negative Dielectric Behavior in Parylene C Based Composite Films

Guduloglu,

Kurnaz,

Seydioglu

et al. 2024

JAASCI

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“…In contrast to inorganic counterparts with a brittle crystalline phase, the solid polymer electrolyte (SPE) exhibits excellent interfacial compatibility, and superior elasticity to endure greater mechanical deformation, contributing to be cast into the complicated architectures for lithium-ion and lithium-metal batteries [ 3 , 4 , 5 ]. Consequently, a wide array of polymers such as poly (ethylene oxide) (PEO) [ 6 , 7 , 8 , 9 ], polyacrylonitrile (PAN) [ 10 , 11 , 12 , 13 ], poly (vinylidene fluoride) (PVdF) [ 14 , 15 ], and its copolymer with hexafluoropropylene (PVdF-HFP) [ 16 , 17 ], poly (methyl methacrylate) (PMMA) [ 18 , 19 , 20 ], and poly (vinyl alcohol) (PVA) [ 21 , 22 , 23 , 24 ], as well as their mixtures [ 25 , 26 , 27 , 28 ], have been adopted as the potential matrices for solid electrolytes. Especially, the outstanding inherent advantages (nontoxicity, biocompatibility, biodegradable, good mechanical strength, relatively high dielectric constant, and charge storage capacity) of PVA make it one of the preferred choices for such applications [ 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Integrity Degradation and Control of All-Solid-State Lithium Battery with Physical Aging Poly (Vinyl Alcohol)-Based Electrolyte

Zhou

et al. 2020

Polymers

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Ensuring the material durability of an electrolyte is a prerequisite for the long-term service of all-solid-state batteries (ASSBs). Herein, to investigate the mechanical integrity of a solid polymer electrolyte (SPE) in an ASSB upon electrochemical operation, we have implemented a sequence of quasi-static uniaxial tension and stress relaxation tests on a lithium perchlorate-doped poly (vinyl alcohol) electrolyte, and then discussed the viscoelastic behavior as well as the strength of SPE film during the physical aging process. On this basis, a continuum electrochemical-mechanical model is established to evaluate the stress evolution and mechanical detriment of aging electrolytes in an ASSB at a discharge state. It is found that the measured elastic modulus, yield stress, and characteristic relaxation time boost with the prolonged aging time. Meanwhile, the shape factor for the classical time-decay equation and the tensile rupture strength are independent of the aging history. Accordingly, the momentary relaxation modulus can be predicted in terms of the time–aging time superposition principle. Furthermore, the peak tensile stress in SPE film for the full discharged ASSB will significantly increase as the aging proceeds due to the stiffening of the electrolyte composite. It may result in the structure failure of the cell system. However, this negative effect can be suppressed by the suggested method, which is given by a 2D map under different lithiation rates and relative thicknesses of the electrolyte. These findings can advance the knowledge of SPE degradation and provide insights into reliable all-solid-state electrochemical device applications.

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AC Impedance Study of PMMA‐LiNO₃ Electrolyte

Cited by 2 publications

References 22 publications

Frequency Dependent Negative Dielectric Behavior in Parylene C Based Composite Films

Frequency Dependent Negative Dielectric Behavior in Parylene C Based Composite Films

Mechanical Integrity Degradation and Control of All-Solid-State Lithium Battery with Physical Aging Poly (Vinyl Alcohol)-Based Electrolyte

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AC Impedance Study of PMMA‐LiNO3 Electrolyte

Cited by 2 publications

References 22 publications

Frequency Dependent Negative Dielectric Behavior in Parylene C Based Composite Films

Frequency Dependent Negative Dielectric Behavior in Parylene C Based Composite Films

Mechanical Integrity Degradation and Control of All-Solid-State Lithium Battery with Physical Aging Poly (Vinyl Alcohol)-Based Electrolyte

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AC Impedance Study of PMMA‐LiNO₃ Electrolyte