Sub-Department of Environmental Technology, Wageningen University, Bornse Weilanden 9, PO Box 17, 6708 WG Wageningen, The Netherlands.
Environ Sci Technol. 2012 Mar 20;46(6):3554-60. doi: 10.1021/es204126r. Epub 2012 Mar 1.
We developed an integrated system for storage of renewable electricity in a microbial fuel cell (MFC). The system contained a capacitive electrode that was inserted into the anodic compartment of an MFC to form a capacitive bioanode. This capacitive bioanode was compared with a noncapacitive bioanode on the basis of performance and storage capacity. The performance and storage capacity were investigated during polarization curves and charge-discharge experiments. During polarization curves the capacitive electrode reached a maximum current density of 1.02 ± 0.04 A/m(2), whereas the noncapacitive electrode reached a current density output of only 0.79 ± 0.03 A/m(2). During the charge-discharge experiment with 5 min of charging and 20 min of discharging, the capacitive electrode was able to store a total of 22,831 C/m(2), whereas the noncapacitive electrode was only able to store 12,195 C/m(2). Regarding the charge recovery of each electrode, the capacitive electrode was able to recover 52.9% more charge during each charge-discharge experiment compared with the noncapacitive electrode. The capacitive electrode outperformed the noncapacitive electrode throughout each charge-discharge experiment. With a capacitive electrode it is possible to use the MFC simultaneously for production and storage of renewable electricity.
我们开发了一种用于微生物燃料电池（MFC）中可再生电能存储的集成系统。该系统包含一个电容电极，插入 MFC 的阳极室中形成电容生物阳极。基于性能和存储容量，对电容生物阳极和非电容生物阳极进行了比较。在极化曲线和充放电实验中研究了性能和存储容量。在极化曲线中，电容电极达到了 1.02±0.04 A/m²的最大电流密度，而非电容电极的电流密度输出仅为 0.79±0.03 A/m²。在 5 分钟充电和 20 分钟放电的充放电实验中，电容电极总共能够存储 22,831 C/m²，而非电容电极仅能存储 12,195 C/m²。关于每个电极的电荷恢复，与非电容电极相比，电容电极在每次充放电实验中能够恢复 52.9%更多的电荷。在每次充放电实验中，电容电极的性能均优于非电容电极。通过使用电容电极，可以同时利用 MFC 进行可再生电能的生产和存储。
