Cha Hyeonjin, Kwon Obeen, Kim Jaeyeon, Choi Heesoo, Yoo Hongnyoung, Kim Hyeok, Park Taehyun
School of Mechanical Engineering, Soongsil University, 369 Sangdo-ro, Dongjak-gu, Seoul 06978, Republic of Korea.
ACS Omega. 2021 Dec 6;6(50):34752-34762. doi: 10.1021/acsomega.1c05199. eCollection 2021 Dec 21.
It is necessary to apply a nonenzymatic glucose fuel cell using a proton exchange membrane for an implantable biomedical device that operates at low power. The permeability of glucose with high viscosity and a large molecular weight in the porous medium of the diffusion layer was investigated for use in fuel cells. Carbon paper was prepared as an anode diffusion layer, and it was analyzed with a diffusion layer treated with polytetrafluoroethylene (PTFE) and a microporous layer (MPL). When untreated carbon paper was applied, the peak power density (PPD) and open-circuit voltage (OCV) increased as the glucose concentration and flow rate increased. On this occasion, the highest PPD of 17.81 μW cm was achieved at 3 mM and a 2.0 mL min glucose aqueous solution (at atmospheric pressure and 36.5 °C). The diffusion layer, which became more hydrophobic through PTFE treatment, adversely affected glucose permeability. In addition, the addition of an MPL decreased OCV and PPD with increasing glucose concentrations and flow rates. Compared with untreated carbon paper, the PPD was six times lower approximately. Consequently, it was confirmed that the properties of carbon paper, such as low hydrophobicity, high porosity, and thin thickness, would be advantageous for nonenzymatic glucose fuel cells.
对于低功率运行的可植入生物医学设备，应用使用质子交换膜的非酶葡萄糖燃料电池是必要的。研究了高粘度和大分子量葡萄糖在扩散层多孔介质中的渗透性，以用于燃料电池。制备了碳纸作为阳极扩散层，并对其与用聚四氟乙烯（PTFE）处理的扩散层和微孔层（MPL）进行了分析。当应用未处理的碳纸时，峰值功率密度（PPD）和开路电压（OCV）随着葡萄糖浓度和流速的增加而增加。在此情况下，在3 mM和2.0 mL min的葡萄糖水溶液（在大气压和36.5°C下）下实现了17.81 μW cm的最高PPD。通过PTFE处理变得更疏水的扩散层对葡萄糖渗透性产生了不利影响。此外，添加MPL会随着葡萄糖浓度和流速的增加而降低OCV和PPD。与未处理的碳纸相比，PPD大约低六倍。因此，证实了碳纸的低疏水性、高孔隙率和薄厚度等特性对非酶葡萄糖燃料电池是有利的。
