| 초록 |
The lower ionic conductivity in anion exchange membranes (AEMs) than Nafion remains a concern for practical applications in microbial fuel cells. Cross-linked structures are a popular way to optimize the trade-off between ionic conductivity and water swelling of AEMs with high ion exchange capacities (IECs). However, cross-linked AEMs that have higher cross-linking are usually brittle and exhibit lower conductivities. Here we report a series of partially diamine crosslinked (x =10%, 15%, 20%) AEMs functionalized with dimethylhexadecylammonium groups. The flexibility and swelling of these partially crosslinked AEMs are significantly improved as compared to the conventional un-cross-linked materials. The higher conductivities in these AEMS (for example, x=20%, IEC = 1.96 mmol/g, σCl− = 47 mS/cm at 80 °C) are attributed to the distinct microphase separation as observed in SAXS and AFM analyses. Finally, microbial fuel cell performances of the membranes are compared with Nafion. |
