scholarly journals AC Impedance Spectroscopy of Lithium-Ion Secondary Cell Exposed to Elevated Temperature

2010 ◽  
Vol 78 (5) ◽  
pp. 435-437
Author(s):  
Tomomi HARADA ◽  
Jun-ichi TANAKA ◽  
Akira NAKAZAWA ◽  
Minoru UMEDA ◽  
Yoshitsugu SONE
Keyword(s):  
Elevated Temperature ◽  
Impedance Spectroscopy ◽  
Lithium Ion ◽  
Ac Impedance ◽  
Ac Impedance Spectroscopy

The Effect of Crystalline Microstructure of PVDF Binder on Mechanical and Electrochemical Performance of Lithium-Ion Batteries Cathode

2020 ◽  
Vol 234 (3) ◽  
pp. 381-397
Author(s):  
Mohammad Mohsen Loghavi ◽  
Saeed Bahadorikhalili ◽  
Najme Lari ◽  
Mohammad Hadi Moghim ◽  
Mohsen Babaiee ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Electrochemical Performance ◽  
Polyvinylidene Fluoride ◽  
Mechanical Stability ◽  
Lithium Ion ◽  
Ac Impedance ◽  
Ac Impedance Spectroscopy ◽  
Transfer Resistance ◽  
Crystalline Phases ◽  
Charge Discharge

AbstractIn this paper, the effect of the crystalline microstructures of polyvinylidene fluoride (PVDF), as cathode binder, on mechanical and electrochemical properties of the cathode, and on the cell performance is investigated. The crystalline phases of the PVDF films prepared at different temperatures are determined by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) and also mechanical strength of PVDF films evaluated by a tensile test. The cathodes were prepared at altered temperatures to achieve different PVDF phases. The effect of various crystalline phases on the cathode performance was studied. The obtained cathodes were analyzed by scanning electron microscope (SEM), contact angle measurement, and adhesion test. The electrochemical performance of the cathodes was evaluated by charge-discharge cycling test and AC impedance spectroscopy. Mechanical tests results showed that the cathode which is prepared at 60 °C has the best adhesion and mechanical stability. In addition, the charge-discharge cycling studies showed that this cathode has the highest capacity efficiency. AC impedance spectroscopy illustrated that this electrode has the lowest charge transfer resistance and SEI resistance.

Study of PVAc-PMMA-LiCl polymer blend electrolyte and the effect of plasticizer ethylene carbonate and nanofiller titania on PVAc-PMMA-LiCl polymer blend electrolyte

2017 ◽  
Vol 37 (6) ◽  
pp. 617-631 ◽  
Author(s):  
Manuel Victor Leena Chandra ◽  
Shunmugavel Karthikeyan ◽  
Subramanian Selvasekarapandian ◽  
Manavalan Premalatha ◽  
Sampath Monisha
Keyword(s):  
Impedance Spectroscopy ◽  
Polymer Electrolyte ◽  
Polymer Blend ◽  
Polymer Electrolytes ◽  
Ethylene Carbonate ◽  
Lithium Ion ◽  
Ac Impedance ◽  
Ac Impedance Spectroscopy ◽  
Ion Conducting ◽  
Polymer Blend Electrolyte

Abstract lithium ion conducting polymer electrolyte is one of the essential components of modern rechargeable lithium batteries because of its good interfacial contact with electrodes and effective mechanical properties. A solid lithium ion conducting polymer blend electrolyte is prepared using poly (vinyl acetate) (PVAc) and poly (methyl methacrylate) (PMMA) polymers with different molecular weight percentages (wt%) of lithium chloride (LiCl) by the solution casting technique with tetrahydrofuran as a solvent. The polymer electrolytes were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), Thermogravimetry (TG), AC impedance spectroscopy and ionic transport measurements. XRD and FTIR studies confirm the amorphous nature of the polymer electrolyte and the complexation of salt with polymer. The thermal behavior of polymer electrolytes has been studied from DSC and TG. The highest conductivity obtained using AC impedance spectroscopy is 1.03×10−5 Scm−1 at 303 K for 70 wt%PVAc:30 wt%PMMA:0.8 wt% of LiCl polymer-salt complex. The plasticizer ethylene carbonate (EC) and nanofiller titania (TiO2) were added to the optimized high conducting blend polymer electrolyte. An enhancement in conductivity by one order of magnitude was observed for the plasticized 70 wt%PVAc-30 wt%PMMA-0.8 wt% LiCl polymer electrolyte at ambient temperature. The ionic conductivity value obtained using AC impedance spectroscopy for the plasticized 70 wt%PVAc-30 wt%PMMA-0.8 wt% LiCl polymer electrolyte was 1.03×10−4 Scm−1. The highest conductivity obtained for 70 wt%PVAc-30 wt%PMMA-0.8% LiCl-6 mg TiO2 was 4.45×10−4 Scm−1. Dielectric properties of polymer films are studied and discussed. The electrochemical stability of 1.69 V and 2.69 V was obtained for 70 wt%PVAc-30 wt%PMMA-0.8% LiCl and 70 wt%PVAc-30 wt%PMMA-0.8% LiCl-6 mg TiO2 polymer electrolytes, respectively, using linear sweep voltammetry. The value of Li+ ion transference number was estimated by the DC polarization method and was found to be 0.99 for the highest conducting 70 wt%PVAc-30 wt%PMMA-0.8 wt% LiCl-6 mg TiO2 nanocomposite polymer electrolyte.

Investigation of Electronic Resistance in Lithium-Ion Batteries by AC Impedance Spectroscopy

2017 ◽  
Vol 164 (14) ◽  
pp. A3862-A3867 ◽  
Author(s):  
Mitsuhiro Takeno ◽  
Tomokazu Fukutsuka ◽  
Kohei Miyazaki ◽  
Takeshi Abe
Keyword(s):  
Impedance Spectroscopy ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Ac Impedance ◽  
Ac Impedance Spectroscopy

scholarly journals Lithium-Ion Battery Real-Time Diagnosis with Direct Current Impedance Spectroscopy

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4396
Author(s):  
Yun Bao ◽  
Yuansheng Chen
Keyword(s):  
Impedance Spectroscopy ◽  
Rapid Development ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Ac Impedance ◽  
Charge Transfer Resistance ◽  
Battery Life ◽  
Ac Impedance Spectroscopy ◽  
Test Environment ◽  
Transfer Resistance

The health and safety of lithium-ion batteries are closely related to internal parameters. The rapid development of electric vehicles has boosted the demand for online battery diagnosis. As the most potential automotive battery diagnostic technology, AC impedance spectroscopy needs to face the problems of complex test environment and high system cost. Here, we propose a DC impedance spectroscopy (DCIS) method to achieve low-cost and high-precision diagnosis of automotive power batteries. According to the resistance–capacitance structure time constant, this method can detect the battery electrolyte resistance, the solid electrolyte interphase resistance and the charge transfer resistance by controlling the pulse time of the DC resistance measurement. Unlike AC impedance spectroscopy, DCIS does not rely on frequency domain impedance to obtain battery parameters. It is a time-domain impedance spectroscopy method that measures internal resistance through a time function. Through theoretical analysis and experimental data, the effectiveness of the DCIS method in battery diagnosis is verified. According to the characteristics of DCIS, we further propose a fast diagnostic method for power batteries. The working condition test results show that this method can be used to diagnose online battery life and safety.

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