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Li B, Liu S, Yang H, Wang R, Xu X, Zhou Y, Zhang Y, Yang D, Li J. Fabrication of Coral-like Polyaniline/Continuously Reinforced Carbon Nanotube Woven Composite Films for Flexible High-Stability Supercapacitor Electrodes. ACS APPLIED MATERIALS & INTERFACES 2023; 15:4343-4357. [PMID: 36629286 DOI: 10.1021/acsami.2c20626] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The electrochemical performance is significantly influenced by the structure and surface morphology of the electrode materials used in supercapacitors. Using the floating catalytic chemical vapor deposition (FCCVD) technique, a self-supporting, flexible layer of continuously reinforced carbon nanotube woven film (CNWF) was developed. Then, polyaniline (PANI) was formed in the conductive network of CNWF using cyclic voltammetry electrochemical polymerization (CVEP) in various aqueous electrolytes to produce a series of flexible CNWF/PANI composite films. The impacts of the CVEP period, electrolyte type, and electrolyte concentration on the surface morphology, doping degree, and hydrophilicity of CNWF/PANI composite films were thoroughly examined. The CNWF/PANI1-15C composite electrode, which was created using 15 cycles of CVEP in a solution of 1 M sodium bisulfate, displayed a distinctive coral-like PANI layer with a well-defined sharp nanoprotuberance structure, a 48% doping degree, and a quick reversible pseudocapacitive storage mechanism. At a current density of 1 A g-1, the energy density and specific capacitance reached 54.9 Wh kg-1 and 1098.0 F g-1, respectively, with a specific capacitance retention rate of 75.9% maintained at 10 A g-1. Both the specific capacitance and coulomb efficiency were maintained at 96.9% and more than 98.1% of their initial values after being subjected to 2000 cycles of galvanostatic charge and discharge, demonstrating excellent electrochemical cycling stability. The CNWF/PANI1-15C composite film, an ideal electrode material, offers a promising future in the field of flexible energy storage due to its exceptional mechanical properties (127.9 MPa tensile strength and 16.2% elongation at break).
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Affiliation(s)
- Bingjian Li
- School of Materials Science and Engineering, Changzhou University, Changzhou213164, China
| | - Shi Liu
- School of Materials Science and Engineering, Changzhou University, Changzhou213164, China
| | - Haicun Yang
- School of Materials Science and Engineering, Changzhou University, Changzhou213164, China
| | - Ran Wang
- School of Materials Science and Engineering, Changzhou University, Changzhou213164, China
| | - Xixi Xu
- School of Materials Science and Engineering, Changzhou University, Changzhou213164, China
| | - Yinjie Zhou
- School of Materials Science and Engineering, Changzhou University, Changzhou213164, China
| | - Yun Zhang
- Changzhou Key Laboratory of Functional Film Materials, Pan Asian Microvent Tech (Jiangsu) Corporation, Changzhou213164, China
| | - Dan Yang
- School of Materials Science and Engineering, Changzhou University, Changzhou213164, China
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, Changzhou University, Changzhou213164, China
| | - Jinchun Li
- School of Materials Science and Engineering, Changzhou University, Changzhou213164, China
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, Changzhou University, Changzhou213164, China
- National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Changzhou213164, China
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Effective Conductivity of Carbon-Nanotube-Filled Systems by Interfacial Conductivity to Optimize Breast Cancer Cell Sensors. NANOMATERIALS 2022; 12:nano12142383. [PMID: 35889607 PMCID: PMC9320743 DOI: 10.3390/nano12142383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/07/2022] [Accepted: 07/07/2022] [Indexed: 01/27/2023]
Abstract
Interfacial conductivity and “Lc”, i.e., the least carbon-nanotube (CNT) length required for the operative transfer of CNT conductivity to the insulated medium, were used to establish the most effective CNT concentration and portion of CNTs needed for a network structure in polymer CNT nanocomposites (PCNT). The mentioned parameters and tunneling effect define the effective conductivity of PCNT. The impact of the parameters on the beginning of percolation, the net concentration, and the effective conductivity of PCNT was investigated and the outputs were explained. Moreover, the calculations of the beginning of percolation and the conductivity demonstrate that the experimental results and the developed equations are in acceptable agreement. A small “Lc” and high interfacial conductivity affect the beginning of percolation, the fraction of networked CNTs, and the effective conductivity. Additionally, a low tunneling resistivity, a wide contact diameter, and small tunnels produce a highly effective conductivity. The developed model can be used to optimize breast cancer cell sensors.
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