直接利用葡萄糖的液流催化燃料电池改进

Improvement of liquid catalytic fuel cell directly utilizing glucose

液相催化燃料电池(LCFC)可直接处理生物质并产电,而电池结构等因素对电池性能有明显影响,但目前还缺乏上述方面的研究。通过系列产电实验考察了温度和酸化条件对Nafion115膜性能的影响、不同氧化条件下石墨毡的改性效果以及电池内部导流槽在不同葡萄糖浓度条件下的影响。结果表明:质子交换膜适宜以80℃酸化处理,该条件下电池功率密度达到5.39 mW·cm^(-2);石墨毡改性适宜以50 mL·min^(-1)干空气流速在420℃条件下对其进行煅烧,该条件下电池功率密度进一步提升至6.21 mW·cm^(-2);葡萄糖浓度显著影响电池性能,当浓度为2.0 mol·L^(-1)时,导流槽结构会降低电池性能,当浓度为1.0 mol·L^(-1)和0.50 mol·L^(-1)时,导流槽结构使电池性能更优,并且也更加稳定。

Liquid catalytic fuel cell （LCFC） can directly convert biomass to electricity. The cell structure and other factors have a significant impact on cell performance, but the relative studies are still very rare. In this study, a series of discharging experiments were carried out to investigate the effect of thermal pretreatment and acidification condition on the performance of Nafion115 membrane, the effect of pre-oxidation conditions on the modification of graphite felt, and the effect of flow channels inside the cell on the performance eat different concentrations of glucose. The results showed that acidification at 80 ℃ was the optimal pretreatment for proton exchange membranes, and the corresponding power density reached 5.39 mW·cm^-2. The graphite felt electrodes can be calcined at 420 ℃ with a dry air flow rate of 50 mL·min^-1, and the power density increased further to 6.21 mW·cm^-2. Glucose concentration was the most significant influencing factor on cell performance. The usage of flow channels deteriorated the performance when glucose concentration was 2 mol·L^-1, while it led to a better and more stable performance when glucose concentration was 1.0 mol·L^-1 and 0.50 mol·L^-1.