Ion‐conductivity study and anomalous diffusion analysis of plasticized gelatin films

Abstract

In this article, we report a study on ion conduction in gelatin films with different concentrations of glycerol as a plasticizer; these films might be a candidate for electrolyte materials in solid polymer batteries. The ion conductivity was appreciable, showing a maximum of about 9.14 3 10 23 S/m at room temperature without the addition of any ionic salt. Analysis of the impedance measurements was done with a model based on material properties instead of the usual equivalent circuit formalism, where circuit elements are difficult to interpret. Generalized calculus was used to model the anomalous diffusion in the system.

Biomaterial‐Based Solid‐Electrolyte Organic Electrochemical Transistors for Electronic and Neuromorphic Applications

“…The lowering of the intensity of this low q z peak upon adding glycerol indicates that glycerol reduces the crystallinity the gelatin structure, in agreement with previous finding. [36,38] The higher d-spacing (d = 1.38 nm) of the 50 wt% glycerol gel compared to that of the 0 wt% (d = 1.00 nm) is related to presence of glycerol that increases the distance between the lamellar plane. At around 1.40 q z , there is change from a partial ring to a more isotropic ring, which indicates a morphological change from partially ordered lamellar domains to more disordered state.…”

“…[34] Furthermore, they can exhibit good ionic-conductivity. [35][36][37][38] For example, certain gels made from gelatin and A systematic study of biomaterial-based solid-state organic electrochemical transistors (OECTs) is presented in which biogels consisting of gelatin and glycerol, two food-grade materials, are chosen as the model solid electrolyte. Such gels are fundamentally attractive for bioelectronics and wearable applications due to their superior and tunable electrical and mechanical properties, which allow one to fabricate solid-state organic transistors with high ON/OFF ratio and transconductance, possible millisecond-switching speed, and 6-month stability in ambient air.…”

“…[39] Moreover, increasing the glycerol concentration has been shown to raise the ionconductivity of the final gels. [35,36,38] These features make gelatin-glycerol gels interesting candidates as solid electrolytes in OECTs for applications dealing with human/electronics interface such as wearable devices.…”

Electrical impedance response of gamma irradiated gelatin based solid polymer electrolytes analyzed using a generalized calculus formalism

“…2 (C)). For higher doses the dc conductivity falls off as same as earlier work [10,11]. In the absence of added salt, the charge carriers were assumed to be primarily Hydronium ions (H 3 O + ) [12].…”

“…The Debye length is sharply decreased by one order after irradiation and then monotonically increases for further increase in dose rate. The charge carrier concentration N in the expression for Debye length λ is the sum of the ion concentration for x=0 and the additional ions for nonzero x for different doses [11,30]. In the present work we choose, N= 0.5x10 20 m -3 .…”