Insight on Polymer Electrolytes for Electrochemical Devices Applications

Designing Versatile Polymers for Lithium-Ion Battery Applications: A Review

“…Several models have been developed to describe ionic conductivity ( σ ), although the most accepted in the scientific community for a homogeneous media (liquid electrolytes and amorphous polymers) is Vogele–Tammane–Fulcher (VTF) [ 40 ], represented in Equation (1): where T is the absolute temperature, A is the pre-exponential factor related to the number of charge ions, is the Boltzmann constant, T 0 ( T 0 = T g − 50 K) is the critical temperature at which configuration entropy or free volume disappears, and is the pseudo-activation energy related to the segmental movement [ 13 ]. The VTF model correlates the conductivity with the segmental relaxation in polymers and indicates that the motion of the polymer chain increases when the temperature or the free volume available increase [ 67 ]. Consequently, the freer the volume available, the more interchain hopping and interchain ion movement that happens, leading to an increase in the amorphous state of the polymer and the ionic conductivity.…”

Luminescent κ-Carrageenan-Based Electrolytes Containing Neodymium Triflate

“…In the same context, we explored the use of the red-seaweeds-derived carrageenan (Cg) acid polysaccharides [18]. All these works revealed that these natural macromolecules have tremendous application potential [19] in various solid state electrochemical devices such as dye-sensitized solar cells [20,21], fuel cells [22,23,24], energy storage devices [3], and electrochromic devices (ECDs) [7,10,14].…”