@article{6f580b56cf724227aefbd96f450057ee,
title = "Enhanced Electrical and Mechanical Properties of Chemically Cross-Linked Carbon-Nanotube-Based Fibers and Their Application in High-Performance Supercapacitors",
abstract = "The electrical conductivity and mechanical strength of fibers constructed from single-walled carbon nanotubes (CNTs) are usually limited by the weak interactions between individual CNTs. In this work, we report a significant enhancement of both of these properties through chemical cross-linking of individual CNTs. The CNT fibers are made by wet-spinning a CNT solution that contains 1,3,5-tris(2′-bromophenyl)benzene (2TBB) molecules as the cross-linking agent, and the cross-linking is subsequently driven by Joule heating. Cross-linking with 2TBB increases the conductivity of the CNT fibers by a factor of ∼100 and increases the tensile strength on average by 47%; in contrast, the tensile strength of CNT fibers fabricated without 2TBB decreases after the same Joule heating process. Symmetrical supercapacitors made from the 2TBB-treated CNT fibers exhibit a remarkably high volumetric energy density of ∼4.5 mWh cm-3 and a power density of ∼1.3 W cm-3.",
keywords = "Joule heating, carbon nanotube fiber, electrical conductivity, mechanical strength, supercapacitor",
author = "Gang Wang and Kim, {Sung Kon} and Wang, {Michael Cai} and Tianshu Zhai and Siddhanth Munukutla and Girolami, {Gregory S.} and Sempsrott, {Peter J.} and Sungwoo Nam and Braun, {Paul V.} and Lyding, {Joseph W.}",
note = "Funding for this project was provided in part by a seed funding grant from the Beckman Institute for Advanced Science and Technology at the University of Illinois. G.S.G. acknowledges support from the National Science Foundation under Grant No. CHE 1665191. S.N. acknowledges support from the National Science Foundation under Grant No. DMR 1708852. P.V.B. and J.W.L. acknowledge support from the National Science Foundation Engineering Research Center for Power Optimization of Electro Thermal Systems (POETS) under Grant No. EEC 1449548. G.W. would like to thank Dr. Subedi for the use of the microbalance, and Dr. Meng Qinghai for discussions and help with the wet-spinning fabrication method. This work was conducted in part at the Microscopy Suite of the Beckman Institute for Advanced Science and Technology at the University of Illinois at Urbana—Champaign (UIUC-BI-MS). Material characterization and mechanical measurement were carried out in part in the Materials Research Laboratory Central Research Facilities, University of Illinois.",
year = "2020",
month = jan,
day = "28",
doi = "10.1021/acsnano.9b07244",
language = "English (US)",
volume = "14",
pages = "632--639",
journal = "ACS Nano",
issn = "1936-0851",
publisher = "American Chemical Society",
number = "1",
}