Ionic Liquid-Doped Gel Polymer Electrolyte for Flexible Lithium-Ion Polymer Batteries

Abstract

Application of gel polymer electrolytes (GPE) in lithium-ion polymer batteries can address many shortcomings associated with liquid electrolyte lithium-ion batteries. Due to their physical structure, GPEs exhibit lower ion conductivity compared to their liquid counterparts. In this work, we have investigated and report improved ion conductivity in GPEs doped with ionic liquid. Samples containing ionic liquid at a variety of volume percentages (vol %) were characterized for their electrochemical and ionic properties. It is concluded that excess ionic liquid can damage internal structure of the batteries and result in unwanted electrochemical reactions; however, samples containing 40–50 vol % ionic liquid exhibit superior ionic properties and lower internal resistance compared to those containing less or more ionic liquids.

The determination of effective diffusion coefficient from the electrochemical impedance spectra of composite poly (vinyl alcohol) membranes

“…The Warburg element W s represents the mass transport limitation that occurs at low frequencies . Its impedance can be calculated using following equation where R w , T and P are fitted element parameters.…”

Study of Interfacial Interactions in Physically Transient Soft Layered Structures: A Step toward Understanding Interfacial Bonding and Failure in Soft Degradable Structures

“…Multilayer structures consisting of dissimilar materials are pervasive, and have attracted considerable interest and attention, since they are relevant to diverse engineering applications including soft electronics, stimuli responsive morphing structures, [1] batteries, [2] supercapacitors, [3] sensors, [4] actuators, [5][6][7] and many others. Besides fracture caused by external forces, such as contact load, [8][9][10] cyclic load, [11,12] and impact, [13] failures of multilayer structures can result from strain mismatch of the constituent layers: problems include thermal expansion mismatch, [14] hydro swelling mismatch, [15] strain gradient caused by nonuniform electric field, [16,17] and many others.…”

Zn rechargeable cell with a gel polymer electrolyte based on an ionic liquid

“…as substitutes for organic solvents 5,6 . They are considered as room temperature molten salts consisting of bulky, asymmetric cations and inorganic anions.…”