直接乙醇燃料电池研究面临的挑战

Challenges for direct ethanol fuel cell research

从热力学、动力学及乙醇渗透等方面,综述了直接乙醇燃料电池(DEFC)研究面临的挑战。从热力学角度看,在低温(<100℃)时,乙醇的最大热力学转化效率低于14%,降低了DEFC的效率;从动力学角度看,目前对乙醇氧化活性最高的Pt-Sn催化剂仍不能使乙醇完全氧化,降低了DEFC的法拉第效率;乙醇渗透可能带来的后果,加大了研究的困难性。

The challenges for direct ethanol fuel cell（DEFC） research were reviewed from the aspects of thermodynamic, kinetic and ethanol crossover. From the thermodynamic point of view, the maximum thermodynamic conversion efficiency of ethanol was less than 14% at low temperature （ 〈 100 ℃）, which decreased the efficiency of DEFC; from the kinetic point of view, even Pt- Sn,the most active catalyst for ethanol electro-oxidation to date, could not oxidize ethanol completely, decreased the Faradic efficiency of DEFC ; the negative consequences from ethanol crossover increased the difficulty in the research.