Gu Yuanhang, Ding Junjie, Hu Guang, You Feng, Chen Shaoyun, Huang Huabo, Hu Chenglong
School of Optoelectronic Materials & Technology, Jianghan University, Wuhan 430056, China.
Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Key Laboratory for Green Chemical Process of Ministry of Education, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
ACS Omega. 2024 Dec 13;9(51):50237-50245. doi: 10.1021/acsomega.4c05727. eCollection 2024 Dec 24.
Iron-oxide (FeO) nanoneedles were first in situ grown on the surface of carbon nanofibers (CNFs) using hydrothermal and N annealing process, and then polyaniline (PANI) was coated on the FeO nanoneedles to form network-like nanorods through dilute solution polymerization. The PANI/FeO/CNFs binder-free electrode exhibited a high specific capacitance of 603 F/g at 1 A/g with good rate capability. (The capacitance loss was about 48.3% when the current density increased from 1.0 to 5.0 A/g.) It was caused by the fact that the PANI/FeO/CNFs with a well-connected structure could provide a continuous electron transport path and improve the conductivity of the entire electrode. The solid-state hybrid PANI/FeO/CNFs∥PANI/FeO/CNFs symmetric device also achieved a high energy density of 29.85 Wh/kg at a power density of 500 W/kg. This universal compatible synthetic method for the PANI/FeO/CNFs electrode could extend to other supercapacitor electrode systems, making it easy to fabricate various ternary electrodes for supercapacitors.
首先采用水热法和氮气退火工艺在碳纳米纤维（CNF）表面原位生长氧化铁（FeO）纳米针，然后通过稀溶液聚合在FeO纳米针上包覆聚苯胺（PANI），形成网络状纳米棒。PANI/FeO/CNF无粘结剂电极在1 A/g电流密度下表现出603 F/g的高比电容，倍率性能良好。（当电流密度从1.0 A/g增加到5.0 A/g时，电容损失约为48.3%。）这是由于具有良好连接结构的PANI/FeO/CNF能够提供连续的电子传输路径，提高整个电极的导电性。固态混合PANI/FeO/CNF∥PANI/FeO/CNF对称器件在500 W/kg的功率密度下也实现了29.85 Wh/kg的高能量密度。这种用于PANI/FeO/CNF电极的通用兼容合成方法可以扩展到其他超级电容器电极系统，便于制备各种用于超级电容器的三元电极。
