光驱动螺旋藻液流燃料电池的发电性能研究OA

Aiming at the ecological and environmental issues caused by massive algal blooms,this study proposed a green energy-saving method that directly utilized sunlight to drive the depolymerization of algae to generate electricity based on the principle of flow fuel cells.By controlling process conditions such as illumination time,light source type and reaction temperature,the power generation performance of a light-driven spirulina flow fuel cell was systematically investigated and compared with the method of heating depolymerizing spirulina.At the same time,the depolymerization products of spirulina after power generation using different methods were characterized through Fourier-transform infrared spectroscopy,scanning electron microscopy and gas chromatography-mass spectrometry.The results showed that copper chloride solution could effectively degrade spirulina and store electrons under heating or illumination conditions.When using spirulina as the direct fuel of the battery anode to prepare the anolyte,the optimal process conditions were as follows:2.5 mol/L CuCl2 was used as the catalytic oxidant,and the spirulina was pretreated by solar light for 5 h.When this anode electrolyte was paired with a high-potential vanadium oxy-cathode electrolyte in the constructed low-temperature liquid flow fuel cell power generation system,the maximum output power density reached 321 W/m2,the maximum output current density reached 2 475 A/m2,and the power generation at a rated voltage of 0.3 V for 10 min was 3.421 J.The power generation performance surpassed the method of heating spirulina at 65℃.