论文标题
带有AU胶体的活跃碳的超级电容器：将胶体放置在电解质/电极界面的情况
Active-carbon based supercapacitors with Au colloids: the case for placing the colloids at the electrolyte/electrode interface
论文作者
论文摘要
超级电容器（S-C）是短期储能元件，可以找到许多应用，例如电子充电设备和电力波动的抑制器，这些网格与可持续来源相连。当将金属胶体分散在其介电上时，普通电容器的电容会增加。 S-C的类似策略是指纳米级金属胶体的部署（在我们的情况下，是Au nano颗粒或AuNPS），在电解质和多孔电极之间非常狭窄的界面（在此处，在Grafoil电流收集器上进行了活性碳膜）。这是通过制造涂层aunps负电荷的配体来实现的。我们证明了特异性的电容增加，并在浆液中添加了官能化的AUNP。例如，当将30 micro-g的AuNP与200 mg活性碳合并时，同时使用1 M Na2SO4电解质和5％乙酸纤维酯丁酸酯作为粘合剂，以20 mV/s的扫描速率数据表明特定的电容放大10倍。我们证明，AuNP对电极表面的粘附很强：在更换1 M Na2SO4至1 M KOH到1 M KOH并保留相同的电极时，与1 M Na2SO4电解质相比，增强电容因子的增强电容因子降低，但在C-v频率为20 MV的情况下，〜3，〜3，〜3，〜3。
Supercapacitors (S-C) are short-term energy storage elements that find many applications, e.g., electronic charging devices and suppressors of power fluctuations in grids that are interfaced with sustainable sources. The capacitance of an ordinary capacitor increases when dispersing metallic colloids in its dielectric. A similar strategy for S-C means a deployment of nano-scale metal colloids (in our case, Au nano particles, or AuNPs) at the very narrow interface between an electrolyte and the porous electrode (here, active-carbon film on a grafoil current collector). This is achieved by making the ligand that is coating the AuNPs negatively charged. We demonstrated a very large specific capacitance increase with a minute addition of functionalized AuNPs to the slurry. For example, C-V data at a scan rate of 20 mV/s indicated a specific capacitance amplification by a factor of 10 when 30 micro-g of AuNPs were incorporated with 200 mg of active carbon while using a 1 M Na2SO4 electrolyte and a 5% cellulose acetate butyrate as a binder. We make the case that the adhesion of the AuNPs to the surface of the electrode was strong: upon replacing the electrolyte, from 1 M Na2SO4 to 1 M KOH and retaining the same set of electrodes, the enhancement capacitance factor decreased as compared to 1 M Na2SO4 electrolyte but remained large, ~3, as determined by C-V traces at the same scan rate of 20 mV/s.
