A direct urea microfluidic fuel cell with flow-through Ni-supportedcarbon- nanotube-coated sponge as porous electrode
A direct urea microfluidic fuel cell with flow-through Ni-supportedcarbon- nanotube-coated sponge as porous electrode
复制标题
以流通式镍负载碳纳米管涂层海绵为多孔电极的直接尿素微流控燃料电池
DOI：
10.1016/j.jpowsour.2017.07.055
复制
发表时间：
2017
影响因子：
9.2
通讯作者：
Dennis Y.C. Leung
中科院分区：
文献类型：
--
作者：
Huimin Zhang;Yifei Wang;Zucheng Wu;Dennis Y.C. Leung
研究了一种直接尿素微流体燃料电池（UMFC），该电池使用镍支撑的碳纳米管涂层海绵（Ni/CNT@Sponge）作为流动多孔阳极。通过Ni/CNT复合材料合成，再经过海绵浸渍-干燥工艺制备了Ni/CNT@Sponge电极。Ni/CNT催化剂的尿素电氧化性能优于Ni/C催化剂。Ni/CNT@Sponge的三维结构可以提供较高的有效有源面积，从而提高了UMFC电池的性能。UMFC分别在阳极和阴极的碱性和酸性环境下工作，实现了1.976 V的高理论OCV。以3 M尿素和3 M KOH为阳极液，1.5 M h2so4为阴极液，在20℃下可得到0.92 V的OCV。当温度升高至45℃时，峰值功率密度为3.9 mW cm - 2，最大电流密度为23 mA cm - 2，峰值功率密度为6.6 mW cm - 2，最大电流密度为33 mA cm - 2。本研究开发了一种新型的尿素微流控燃料电池，也为富尿素废水的处理开辟了一条有前景的途径。
A direct urea microfluidic fuel cell (UMFC) is demonstrated using a Ni-supported-carbon-nanotube-coated sponge (Ni/CNT@Sponge) as the flow-through porous anode. Ni/CNT@Sponge electrode is prepared through Ni/CNT composite synthesis followed by sponge dipping-drying process. Ni/CNT catalyst shows better performance to urea electrooxidation than Ni/C. The three-dimensional architecture of Ni/CNT@Sponge can provide high effective active area, which enhances the UMFC cell performance. The UMFC works in an alkaline and an acid environment at the anode and cathode respectively, achieving a high theoretical OCV of 1.976 V. With 3 M urea in 3 M KOH as anolyte, 1.5 M H2SO4as the catholyte, an OCV of 0.92 V at 20 °C can be obtained. Peak power density and maximum current density of 3.9 mW cm−2and 23 mA cm−2can be achieved, respectively, which increase to 6.6 mW cm−2and 33 mA cm−2, respectively when the temperature is increased to 45 °C. This work develops a new type of urea microfluidic fuel cell, also opens up a promising approach for urea-rich wastewater treatment.