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Abstract：
The advancement of flexible electrodes triggered research on wearables and health monitoring applications. Metal-based bioelectrodes encounter low mechanical strength and skin discomfort at the electrode-skin interface. Thus, recent research has focused on the development of flexible surface electrodes with low electrochemical resistance and high conductivity. This study investigated the development of a novel, flexible, surface electrode based on a MXene/polydimethylsiloxane (PDMS)/glycerol composite. MXenes offer the benefit of featuring highly conductive transition metals with metallic properties, including a group of carbides, nitrides, and carbonitrides, while PDMS exhibits inherent biostability, flexibility, and biocompatibility. Among the various MXene-based electrode compositions prepared in this work, those composed of 15% and 20% MXene content were further evaluated for their potential in electrophysiological sensing applications. The samples underwent a range of characterization techniques, including electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), as well as mechanical and bio-signal sensing from the skin. The experimental findings indicated that the compositions demonstrated favorable bulk impedances of 280 and 111 Ω, along with conductivities of 0.462 and 1.533 mS/cm, respectively. Additionally, they displayed promising electrochemical stability, featuring charge storage densities of 0.665 mC/cm2 and 1.99 mC/cm2, respectively. By conducting mechanical tests, Young\'s moduli were determined to be 2.61 MPa and 2.18 MPa, respectively. The composite samples exhibited elongation of 139% and 144%, respectively. Thus, MXene-based bioelectrodes show promising potential for flexible and wearable electronics and bio-signal sensing applications.
摘要：
柔性电极的发展引发了可穿戴设备和健康监测应用的研究。金属基生物电极在电极-皮肤界面处遇到低机械强度和皮肤不适。因此，最近的研究集中在开发具有低电化学电阻和高电导率的柔性表面电极。这项研究调查了小说的发展，灵活,基于MXene/聚二甲基硅氧烷（PDMS）/甘油复合材料的表面电极。MXenes提供了具有金属特性的高导电过渡金属的优点，包括一组碳化物，氮化物，和碳氮化物，虽然PDMS表现出固有的生物稳定性，灵活性,和生物相容性。在这项工作中制备的各种MXene基电极组合物中，进一步评估了由15％和20％MXene含量组成的那些在电生理传感应用中的潜力。样品经历了一系列的表征技术，包括电化学阻抗谱(EIS)，循环伏安法（CV），以及来自皮肤的机械和生物信号传感。实验结果表明，组合物表现出280和111Ω的良好体阻抗，电导率为0.462和1.533mS/cm，分别。此外,它们显示出有希望的电化学稳定性，电荷存储密度分别为0.665mC/cm2和1.99mC/cm2。通过进行机械测试，杨氏模量确定为2.61MPa和2.18MPa，分别。复合材料样品表现出139%和144%的伸长率，分别。因此，基于MXene的生物电极在柔性和可穿戴电子设备和生物信号感测应用中显示出有希望的潜力。
