Pandit Bidhan, Sankapal Babasaheb R, Koinkar Pankaj M
Nano Materials and Device Laboratory, Department of Physics, Visvesvaraya National Institute of Technology, South Ambazari Road, Nagpur, 440010, Maharashtra, India.
Department of Optical Science, Tokushima University, 2-1 Minamijosanjima Cho, Tokushima, 7708506, Japan.
Sci Rep. 2019 Apr 10;9(1):5892. doi: 10.1038/s41598-019-42301-y.
Electrode materials having high capacitance with outstanding stability are the critical issues for the development of flexible supercapacitors (SCs), which have recently received increasing attention. To meet these demands, coating of CeO nanoparticles have been performed onto MWCNTs by using facile chemical bath deposition (CBD) method. The formed CeO/MWCNTs nanocomposite exhibits excellent electrochemical specific capacitance of 1215.7 F/g with 92.3% remarkable cyclic stability at 10000 cycles. Light-weight flexible symmetric solid-state supercapacitor (FSSC) device have been engineered by sandwiching PVA-LiClO gel between two CeO/MWCNTs electrodes which exhibit an excellent supercapacitive performance owing to the integration of pseudocapacitive CeO nanoparticles onto electrochemical double layer capacitance (EDLC) behaved MWCNTs complex web-like structure. Remarkable specific capacitance of 486.5 F/g with much higher energy density of 85.7 Wh/kg shows the inherent potential of the fabricated device. Moreover, the low internal resistance adds exceptional stability along with unperturbed behavior even under high mechanical stress which can explore its applicability towards high-performance flexible supercapacitor for advanced portable electronic devices.
具有高电容且稳定性优异的电极材料是柔性超级电容器（SCs）发展的关键问题，近年来受到越来越多的关注。为满足这些需求，已通过简便的化学浴沉积（CBD）方法在多壁碳纳米管上进行了CeO纳米颗粒的包覆。所形成的CeO/多壁碳纳米管纳米复合材料表现出优异的电化学比电容，为1215.7 F/g，在10000次循环时具有92.3%的显著循环稳定性。通过将PVA-LiClO凝胶夹在两个CeO/多壁碳纳米管电极之间，设计出了轻质柔性对称固态超级电容器（FSSC）器件，由于将赝电容性CeO纳米颗粒整合到表现出电化学双层电容（EDLC）的多壁碳纳米管复杂网状结构上，该器件表现出优异的超级电容性能。486.5 F/g的显著比电容以及85.7 Wh/kg的更高能量密度显示了所制备器件的内在潜力。此外，低内阻赋予了其卓越的稳定性，即使在高机械应力下也能保持稳定运行，这使其在高性能柔性超级电容器用于先进便携式电子设备方面具有应用潜力。
