Abstract:

The polypyrrole/activated carbon(PPy/AC) composite electrode has been fabricated by chemical oxidative polymerization. And the mass ratio of pyrrole(py) and AC has also been investigated to improve the capacitive deionization performance of composite electrodes. The experimental results show that PPy could significantly improve the specific capacitance of composite electrodes. But the enlargement of active material loading would make the specific capacitance of composite electrodes decrease obviously，despite the increase of capacitance in this process. At the optimal mass ratio of pyrrole and AC (0.4∶ 1)，the composite electrodes show relatively higher capacitance and specific capacitance，which could efficiently improve the capacitive deionization performance of composite electrodes.

Key words: polypyrrole, chemical polymerization, active material loading, capacitance deionization, desalination

摘要：

采用化学氧化法制备了聚吡咯(PPy)/活性炭(AC)复合电极,并通过在制备过程中优化吡咯(py)与AC的质量比,提升复合电极的电容去离子性能。实验结果显示,PPy可有效提升复合电极的比电容,但在活性材料负载量增大时,电极充放电电容快速增大的同时,比电容明显下降;当m(py)∶m(AC)=0.4∶1时,复合电极在高活性物质负载量下仍然显示出较高的充放电电容和比电容,有效提升了复合电极的电容去离子性能。

关键词: 聚吡咯, 化学聚合, 活性物质负载, 电容去离子, 脱盐效率

CLC Number: 

• TQ085+.411