scholarly journals Dielectric characteristics of fast Li ion conducting garnet-type Li5+2xLa3Nb2−xYxO12 (x = 0.25, 0.5 and 0.75)

2016 ◽  
Vol 18 (22) ◽  
pp. 15418-15426 ◽  
Author(s):  
Sumaletha Narayanan ◽  
Ashok Kumar Baral ◽  
Venkataraman Thangadurai
Keyword(s):  
Impedance Spectroscopy ◽  
Metal Oxides ◽  
Conduction Mechanism ◽  
Ac Impedance ◽  
Ac Impedance Spectroscopy ◽  
Ion Conduction ◽  
Dielectric Characteristics ◽  
Li Ion ◽  
Ion Conducting ◽  
Ion Conduction Mechanism

The dielectric characteristics of Li-stuffed Li5+2xLa3Nb2−xYxO12 garnet-type metal oxides are analyzed in this study using electrochemical AC impedance spectroscopy to understand the Li+ ion conduction mechanism at lower temperatures.

Computational and Experimental Investigation of the Electrochemical Stability and Li-Ion Conduction Mechanism of LiZr2(PO4)3

2017 ◽  
Vol 29 (21) ◽  
pp. 8983-8991 ◽  
Author(s):  
Yusuke Noda ◽  
Koki Nakano ◽  
Hayami Takeda ◽  
Masashi Kotobuki ◽  
Li Lu ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Conduction Mechanism ◽  
Electrochemical Stability ◽  
Ion Conduction ◽  
Li Ion ◽  
Ion Conduction Mechanism

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.

Peculiarly fast Li-ion conduction mechanism in a succinonitrile-based molecular crystal electrolyte: a molecular dynamics study

2021 ◽  
Author(s):  
Ryoma Sasaki ◽  
Makoto Moriya ◽  
Yuki Watanabe ◽  
Kazunori Nishio ◽  
Taro Hitosugi ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Crystal ◽  
Conduction Mechanism ◽  
Ion Conduction ◽  
Fast Transport ◽  
Li Ion ◽  
Ion Conduction Mechanism

Li-ions constructing a crystalline framework behave as fast transport carriers as well owing to the surrounding flexible moieties in a succinonitrile-based molecular crystal electrolyte.

Quantum mechanical insight into the Li‐ion conduction mechanism for solid polymer electrolytes

2020 ◽  
Vol 58 (24) ◽  
pp. 3480-3487
Author(s):  
He Zhou ◽  
Rongmei Zhao ◽  
Yao Xiao ◽  
Li Feng ◽  
Yibin Yang ◽  
...  
Keyword(s):  
Polymer Electrolytes ◽  
Conduction Mechanism ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Quantum Mechanical ◽  
Ion Conduction ◽  
Li Ion ◽  
Ion Conduction Mechanism ◽  
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