Enhancement of Ionic Conductivity of PEO Based Polymer Electrolyte by the Addition of Nanosize Ceramic Powders

Abstract

The ionic conductivity of polyethylene oxide (PEO) based solid polymer electrolytes (SPEs) has been improved by the addition of nanosize ceramic powders (TiO2 and AL2O3). The PEO based solid polymer electrolytes were prepared by the solution-casting method. Electrochemical measurement shows that the 10 wt% TiO2 PEO-LiClO4 polymer electrolyte has the best ionic conductivity (about 10(-4) S cm(-1) at 40-60 degrees C). The lithium transference number of the 10 wt% TiO2 PEO-LiClO4 polymer electrolyte was measured to be 0.47, which is much higher than that of bare PEO polymer electrolyte. Ac impedance testing shows that the interface resistance of ceramic-added PEO polymer electrolyte is stable. Linear sweep voltammetry measurement shows that the PEO polymer electrolytes are electrochemically stable in the voltage range of 2.0-5.0 V versus a Li/Li+ reference electrode.

Nanomaterials for Lithium-ion Rechargeable Batteries

“…Consequently, a higher potential would be needed to extract these ions than in the case where charging is done at a higher rate. Ionic conductivity greater than the order of the magnitude compared with the un-milled samples [130] Ultrasonic and solvent casting in a glove box TiO 2 (15 nm) doped PEO-LiClO 4 polymer electrolyte ∼10 −5 S/cm at 25 C and ∼10 −3 S/cm at 80 C a magnitude of 2 than the bare PEO-LiClO 4 polymer electrolyte [138] Solvent free casting and conditioning mix SiO 2 powders (7 nm) to polymer electrolyte (PUA-polyurethane acrylate)…”

“…All-solid-state rechargeable lithium batteries have been extensively studied [128][129][130][131][132][133][134][135][136][137][138][139] as they have great potential to be used as power sources in electric and hybrid vehicles, as well as in aerospace applications. In a solid-state lithium cell, solid electrolytes must have high ionic conductivity, a high lithium ion transference number, a wide electrochemical stability window, and suitable thermal and mechanical properties.…”

The correlation of electrochemical and fuel cell results for alcohol oxidation in acidic and alkaline media

“…As most of the nanoparticle properties depend on the particle size, the durability of these clusters is the key issue for electrocatalysis: due to their high specific surface energy nanoparticles inherently have a strong driving force for assembling themselves into larger agglomerates to reduce the overall surface energy [130] i.e. small clusters merge forming larger ones (Figure 24), furthermore, the smaller the particles the more rapid the agglomeration proceeds [131].…”

Fillers for Solid-State Polymer Electrolytes: Highlight

“…As conventional compounds, oxide ceramic fillers including Al2O3, 15 TiO2, 16 ZrO2 17,18 have been of major interest in the study of inorganic fillers for SPEs.…”