Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education and State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.
ACS Appl Mater Interfaces. 2013 Aug 14;5(15):7405-9. doi: 10.1021/am4017335. Epub 2013 Jul 12.
NiCo2O4 with higher specific capacitance is an excellent pseudocapacitive material. However, the bulk NiCo2O4 material prevents the achievement of high energy desity and great rate performance due to the limited electroactive surface area. In this work, NiCo2O4 nanosheet arrays were deposited on flexible carbon fabric (CF) as a high-performance electrode for supercapacitors. The NiCo2O4 arrays were constructed by interconnected ultrathin nanosheets (10 nm) with many interparticle pores. The porous feature of NiCo2O4 nanosheets increases the amount of electroactive sites and facilitates the electrolyte penetration. Hence, the NiCo2O4/CF composites exhibited a high specific capacitance of 2658 F g(-1) (2 A g(-1)), good rate performance, and superior cycling life, suggesting the NiCo2O4/CF is a promising electrode material for flexible electrochemical capacitors.
具有更高比电容的 NiCo2O4 是一种出色的赝电容材料。然而，由于电活性表面积有限，块状 NiCo2O4 材料阻碍了实现高能量密度和优异的倍率性能。在这项工作中，NiCo2O4 纳米片阵列沉积在柔性碳纤维布 (CF) 上，作为超级电容器的高性能电极。NiCo2O4 阵列由相互连接的超薄纳米片（10nm）和许多颗粒间的孔隙构成。NiCo2O4 纳米片的多孔特性增加了电活性位点的数量，并促进了电解质的渗透。因此，NiCo2O4/CF 复合材料表现出高比电容 2658 F g-1（2A g-1）、良好的倍率性能和优异的循环寿命，表明 NiCo2O4/CF 是一种有前途的用于柔性电化学电容器的电极材料。
