Chen Xiaojing, Zhang Yichong, Ribeiorinha Paulo, Li Haibin, Kong Xiangyang, Boaventura Marta
School of Materials Science and Engineering, Shanghai Jiao Tong University 800 Dong Chuan Road Shanghai 200240 China.
State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
RSC Adv. 2018 Jan 30;8(10):5225-5232. doi: 10.1039/c7ra12803g. eCollection 2018 Jan 29.
Molten carbonate fuel cells have been commercialized as a mature technology. Due to the liquid electrolyte in molten carbonate fuel cells, gas seal and low contact resistance are easier to achieve than in other fuel cells. Herein, we report an investigation of the viability of a molten oxoacid salt as a novel type of fuel cell electrolyte. In comparison with molten carbonate electrolytes for MCFCs that operate at 500-700 °C, for which a ceramic support matrix is required, the molten proton conductor electrolyte has a lower working temperature range of 150-250 °C. The present study has shown that an electrolyte membrane, in which molten CsH(PO) is held in a matrix made of PBI polymer and SiO powder, has excellent thermal stability, good mechanical properties, and high proton conductivity. In addition, a molten proton conductor fuel cell equipped with such an electrolyte membrane operating at 200 °C showed an open-circuit voltage of 1.08 V, and a stable output voltage during continuous measurement for 150 h at a constant output current density of 100 mA cm.
熔融碳酸盐燃料电池作为一项成熟技术已实现商业化。由于熔融碳酸盐燃料电池中存在液体电解质，相较于其他燃料电池，气体密封和低接触电阻更容易实现。在此，我们报告了一项关于熔融含氧酸盐作为新型燃料电池电解质可行性的研究。与运行温度为500 - 700°C且需要陶瓷支撑基体的熔融碳酸盐燃料电池的熔融碳酸盐电解质相比，熔融质子导体电解质的工作温度范围更低，为150 - 250°C。本研究表明，一种电解质膜，其中熔融的CsH(PO)被固定在由PBI聚合物和SiO粉末制成的基体中，具有优异的热稳定性、良好的机械性能和高质子传导率。此外，配备这种电解质膜的熔融质子导体燃料电池在200°C下运行时，开路电压为1.08 V，在100 mA cm的恒定输出电流密度下连续测量150小时期间输出电压稳定。
