Patil Umakant M, Ghorpade Ravindra V, Nam Min Sik, Nalawade Archana C, Lee Sangrae, Han Haksoo, Jun Seong Chan
Nano ElectroMechanical Device Laboratory, School of Mechanical Engineering, Yonsei University, Seoul 120-749, Republic of Korea.
Electronic Material Laboratory, Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, Republic of Korea.
Sci Rep. 2016 Oct 20;6:35490. doi: 10.1038/srep35490.
The current paper describes enhanced electrochemical capacitive performance of chemically grown Cobalt hydroxide (Co(OH)) nanorods (NRs) decorated porous three dimensional graphitic carbon foam (Co(OH)/3D GCF) as a supercapacitor electrode. Freestanding 3D porous GCF is prepared by carbonizing, high internal phase emulsion (HIPE) polymerized styrene and divinylbenzene. The PolyHIPE was sulfonated and carbonized at temperature up to 850 °C to obtain graphitic 3D carbon foam with high surface area (389 m g) having open voids (14 μm) interconnected by windows (4 μm) in monolithic form. Moreover, entangled Co(OH) NRs are anchored on 3D GCF electrodes by using a facile chemical bath deposition (CBD) method. The wide porous structure with high specific surface area (520 m g) access offered by the interconnected 3D GCF along with Co(OH) NRs morphology, displays ultrahigh specific capacitance, specific energy and power. The Co(OH)/3D GCF electrode exhibits maximum specific capacitance about ~1235 F g at ~1 A g charge-discharge current density, in 1 M aqueous KOH solution. These results endorse potential applicability of Co(OH)/3D GCF electrode in supercapacitors and signifies that, the porous GCF is a proficient 3D freestanding framework for loading pseudocapacitive nanostructured materials.
本文描述了作为超级电容器电极的化学生长氢氧化钴（Co(OH)）纳米棒（NRs）修饰的多孔三维石墨碳泡沫（Co(OH)/3D GCF）增强的电化学电容性能。通过碳化由高内相乳液（HIPE）聚合的苯乙烯和二乙烯基苯制备独立式三维多孔GCF。将聚HIPE磺化并在高达850°C的温度下碳化，以获得具有高表面积（389 m²/g）的石墨三维碳泡沫，其具有开放孔隙（14μm），通过窗口（4μm）以整体形式相互连接。此外，通过简便的化学浴沉积（CBD）方法将缠结的Co(OH) NRs锚定在三维GCF电极上。由相互连接的三维GCF提供的具有高比表面积（520 m²/g）的宽多孔结构以及Co(OH) NRs形态，显示出超高的比电容、比能量和功率。在1 M的KOH水溶液中，Co(OH)/3D GCF电极在约1 A/g的充放电电流密度下表现出约1235 F/g的最大比电容。这些结果证实了Co(OH)/3D GCF电极在超级电容器中的潜在适用性，并表明多孔GCF是用于负载赝电容纳米结构材料的高效三维独立式框架。
