Hybrid Polyaniline/Liquid Crystalline CNT Fiber Composite for Ultimate Flexible Supercapacitors

Abstract

CNT fibers (CNTFs) are excellent platforms for fiber-shaped supercapacitors, offering both high electric conductivity and mechanical resilience. Here, we propose a polyaniline (PANI)/CNTF composite structure that utilizes a state-of-the-art liquidcrystal (LC)-spun CNTF as the ultimate conductive and flexible electrode. CNTFs assume a highly dense LC phase with a high electrical conductivity of 14 kS cm −1 , which is similar to that of its metal counterpart and suitable as a good current collector. Pseudocapacitive PANI can be homogeneously polymerized directly onto the smooth surface of the CNTFs by using the sonochemical polymerization method. The optimized synthetic process produces PANI in a favorable chemical state with good contact properties at the CNTF interface, exhibiting a high capacitance (738 F g −1 at 1 A g −1 ) even at an extremely fast charge/ discharge rate (604 F g −1 at 100 A g −1 ). Moreover, the superior mechanical resilience of the CNTFs enables excellent flexibility, showing a negligible capacitance decay after 15 000 bending cycles, even with tight knots in the middle. These results highlight the excellent potential of highly densified CNTFs in next-generation flexible supercapacitors for practical wearable applications.

3D Architecturing Strategy on the Utmost Carbon Nanotube Fiber for Ultra‐High Performance Fiber‐Shaped Supercapacitor

“…These results are based on the unique characterization of the LC-spun CNTFs with high density and alignment (Figure S2e, Supporting Information). [31] To prepare a 3D architectured fiber-shaped electrode structure, GO was stereoscopically attached to the LC-spun CNTFs by a straightforward electrophoresis method. To analyze the morphology of GO on the CNTF immediately after the deposition process, the as-deposited GO@CNTF fibers were freeze-dried and observed by SEM.…”

“…These results are based on the unique characterization of the LC‐spun CNTFs with high density and alignment (Figure S2e, Supporting Information). [ 31 ]…”

Role of Carbon‐Based Nanomaterials in Enhancing the Performance of Energy Storage Devices: Design Small and Store Big

“…The polyaniline-CNT fiber nanocomposite was fabricated by using liquid-crystal-spun CNT fiber as the ultimate conductive and flexible electrode for supercapacitors. This was investigated by Kim et al [64]. In their study, they were capable of attaining supercapacitor electrodes with a high electrical conductivity of 14 kS cm -1 , good contact properties at the CNT fiber interface, and high capacitance with negligible capacitance.…”

Development and Characterization of Novel Hybrid Materials Formed from ZnO-SiO2-Modified and Polyaniline for Organic Dyes Adsorption and Electrochemical Supercapacitor Applications

“…In previous years, hybrid nanocomposite devices have received great attention owing to their outstanding electrical, optoelectronic, magnetic and adsorption properties, which open a large potential in applications as photovoltaic cells, supercapacitor, light emitting diodes, photodetectors, sensors, adsorption and transistors [1][2][3][4][5][6][7][8]. Hybrid materials have been widely explored due to their easy elaboration, low-cost production process, exibilities, excellent reproducibility and versatile functionalities [9,10 In nanocomposite devices nanoparticles NPs plays a crucial role in amelioration the electrical and optical properties of the devices.…”