Co(Ⅱ)Schiff碱络合物对空气电极性能的影响

Effect of oxygen-enriched material on the properties of air electrode

分别采用浸泡法和直接混合法将富氧材料Co(Ⅱ)Schiff碱络合物担载在空气电极中,通过测量电极的阴极极化曲线,研究了不同担载方法对空气电极性能的影响,并考察了电极性能与Co(Ⅱ)Schiff碱络合物溶液浸泡浓度的相互关系。结果表明,把Co(Ⅱ)Schiff碱络合物用二甲基亚砜溶剂溶解后,在该溶液中浸泡防水膜,使Co(Ⅱ)Schiff碱络合物以分子形式担载到空气电极的防水膜中,由于Schiff碱络合物对氧气的可逆吸附作用,加速了氧在空气电极中的传质速度,使空气电极的性能大幅度提高。采用浸泡法,Co(Ⅱ)Schiff碱络合物浸泡溶液的浓度对电极性能有显著影响。只有当浸泡溶液浓度较低时,通过浸泡法担载到防水膜中的Schiff碱络合物以分子形式吸附在具有多孔结构的防水膜的微孔孔壁上,且并不堵塞微孔时,才能大幅度改善空气电极的性能。

The Co(Ⅱ) Schiff base complex as oxygen-enriched material was added into the air electrode through immerging and directly blending methods. The effect of different adding ways on air electrode properties was investigated by measuring the cathode polarization curves. In addition, the relation between the electrode performance and the concentration of Co(Ⅱ) Schiff base complex in the solution was studied. The results indicate that the electrode performance can be improved greatly when the electrode is made of the hydrophobic membrane loaded with the Co(Ⅱ) Schiff base complex dissolved in dimethyl sulphoxide solution by immerging method. Results also show that the influence of the solution concentration on the electrode performance is significant. Only when the concentration of Co(Ⅱ) Schiff base complex is low and the molecules of the complex absorb on the wall of the pores in the hydrophobic membrane without blocking these pores, can the oxygen-enriched effect of Co(Ⅱ) Schiff base complex increase the transport rate of oxygen in the electrode greatly and bring on the improvement of the electrode performance.