Passive direct methanol fuel cells (DMFC) are applicable for charging portable electronic devices. In passive DMFC, fuel and oxidants are supplied through diffusion and natural convection process. The present experimental work analyzed the effect of the membrane electrode assembly (MEA) activation, methanol concentration, bolt tightening torque and stability of the fuel cell stack. Newly fabricated MEA were activated for different time durations of 0, 6, 12 and 18 hrs at 1 M of methanol concentration with a constant load. The concentration of methanol varied from 1 M to 6 M and also bolt torque varied from 4 N-m to 8 N-m. Further, open circuit voltage (OCV) and voltage stability with respect to time were analyzed. From the results, it is observed that the fuel cell performance was enhanced from 1 M to 5 M and then decreased. From 0–12 hrs, the cell performance increased with respect to time and then continued the same performance at the 18^th hr. From the results, it is also observed that increased bolt torque from 4 N-m to 7 N-m enhanced the fuel cell performance and then decreased. The fuel cell performance was analyzed in terms of maximum power density and maximum current density.

被动直接甲醇燃料电池 (DMFC) 适用于为便携式电子设备充电。在被动 DMFC 中，燃料和氧化剂通过扩散和自然对流过程提供。目前的实验工作分析了膜电极组件 (MEA) 活化、甲醇浓度、螺栓拧紧扭矩和燃料电池堆稳定性的影响。新制造的 MEA 在 0、6、12 和 18 小时的不同时间段内以 1 M 的甲醇浓度和恒定负载激活。甲醇的浓度从 1 M 到 6 M 不等，螺栓扭矩从 4 Nm 到 8 Nm 不等。此外，还分析了开路电压 (OCV) 和电压随时间的稳定性。从结果可以看出，燃料电池性能从 1 M 提高到 5 M，然后下降。从 0-12 小时，^个小时。从结果中还观察到，螺栓扭矩从 4 Nm 增加到 7 Nm 会增强燃料电池的性能，然后会降低。根据最大功率密度和最大电流密度分析燃料电池性能。