Banerjee Abhik, Bhatnagar Sumit, Upadhyay Kush Kumar, Yadav Prasad, Ogale Satishchandra
Centre of Excellence in Solar Energy, Physical, and Materials Chemistry Division, National Chemical Laboratory (CSIR-NCL) , Pune 411 008, India.
ACS Appl Mater Interfaces. 2014 Nov 12;6(21):18844-52. doi: 10.1021/am504333z. Epub 2014 Oct 15.
A supercapacitor electrode is fabricated with Co0.85Se hollow nanowires (HNW) array, which is synthesized by wet chemical hydrothermal selenization of initially grown cobalt hydroxyl carbonate nanowires on conductive CFP. The dense self-organized morphology of Co0.85Se HNWs is revealed by scanning/transmission electron microscopy. The as-synthesized Co0.85Se HNWs possess high pseudocapacitive property with high capacitance retention and high durability. The areal capacitance value is seen to vary from 929.5 to 600 mF cm(-2) (60% retention) as the current density is increased from 1 to 15 mA cm(-2), an increase of a factor of 15. Based on mass loading, this corresponds to a very high gravimetric capacitance of 674 (for 2 mA cm(-2) or 1.48 Ag(-1)) and 444 Fg(1-) (for 15 mA cm(-2) or 11 A g(-1)) in a full-cell configuration with the Co0.85Se HNWs as cathode and activated carbon as anode (asymmetric configuration) promising results are obtained.
一种超级电容器电极由Co0.85Se中空纳米线（HNW）阵列制成，该阵列是通过对最初生长在导电碳纸（CFP）上的碳酸钴羟基纳米线进行湿化学水热硒化合成的。通过扫描/透射电子显微镜揭示了Co0.85Se HNWs致密的自组装形态。合成的Co0.85Se HNWs具有高赝电容性能，具有高电容保持率和高耐久性。当电流密度从1 mA cm(-2)增加到15 mA cm(-2)时，面积电容值从929.5变化到600 mF cm(-2)（保持率60%），增加了15倍。基于质量负载，在以Co0.85Se HNWs为阴极、活性炭为阳极的全电池配置（不对称配置）中，这对应于非常高的比电容，在2 mA cm(-2)（或1.48 Ag(-1)）时为674，在15 mA cm(-2)（或11 A g(-1)）时为444 Fg(1-)，并获得了有前景的结果。
