Effect of network elasticity on the electric double layer of Ionoelastomers
발표자
신희운 (서강대학교)
연구책임자
김형준 (서강대학교)
초록
내용
Ionoelastomers (IEs) are liquid-free single-ion conductors in which one ion is covalently tethered to an elastic polymer network. This study investigates how the elasticity of the network affects EDL capacitance as a function of applied voltage. The results show that elastic energy significantly influences ion distribution: in soft networks with low storage modulus, tethered ions can accumulate densely at interfaces, leading to a symmetric camel-shaped capacitance–voltage (C–V) profile. In contrast, stiff, highly crosslinked networks restrict this accumulation, resulting in an asymmetric C–V profile due to limited mobility of the tethered ions compared to their mobile counterions. Additionally, because polymer elasticity is temperature-dependent, lowering the temperature increases the modulus and enhances the asymmetry in EDL capacitance. These findings highlight the critical role of mechanical elasticity in controlling interfacial ion behavior and capacitance in IEs.