Activated carbon from phenolic resin with controlled mesoporosity for an electric double-layer capacitor (EDLC)
Activated carbon from phenolic resin with controlled mesoporosity for an electric double-layer capacitor (EDLC)
复制标题
DOI：
10.1039/c3ta01638b
复制
发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Lekakou, Constantina
中科院分区：
文献类型：
--
作者：
Lei, Chunhong;Amini, Negar;Lekakou, Constantina
活性炭材料由酚醛树脂前体通过物理活化制备，用于制造双电层电容器（EDLC）的电极。碳材料的孔径和表面积在合成过程中以及碳化后通过在CO2气氛中活化至不同程度的烧尽来控制。使用电化学阻抗谱 (EIS) 和恒电流充放电 (GCD) 测量，使用碳酸丙烯酯中的螺-(1,1')-二吡咯烷鎓四氟硼酸盐有机电解质 SBPBF4/PC，对所得碳材料作为 EDLC 电极进行评估。研究结果表明，碳材料的电容以及 EDLC 电池的能量密度通过增加烧毁（激活）水平而增加。在电流密度为1 mA cm(-2) 时，46% 活性炭的电容约为160 F g(-1)，能量密度约为35 W h kg(-1)。长期循环测试表明这些碳材料具有较高的循环稳定性。
Activated carbon materials are prepared from phenolic resin precursors by physical activation to fabricate electrodes for electric double-layer capacitors (EDLCs). Pore size and surface area of the carbon materials are controlled during the synthesizing process and after the carbonization through activation in a CO2 atmosphere to different levels of burn-off. The resultant carbon materials were evaluated as EDLC electrodes, using electrochemical impedance spectroscopy (EIS) and galvanostatic charge-discharge (GCD) measurements with the organic electrolyte of spiro-(1,1')-bipyrrolidinium tetrafluoroborate in propylene carbonate, SBPBF4/PC. The results of the study showed that the capacitance of carbon materials, as well as energy density of the EDLC cells, increased by increasing the level of burn-off (activation). The 46% activated carbon gave a capacitance of similar to 160 F g(-1) and an energy density of similar to 35 W h kg(-1), at a current density of 1 mA cm(-2). The long term cycling tests showed high cycling stability of these carbon materials.