Nacre-Inspired Strong MXene/Cellulose Fiber with Superior Supercapacitive Performance via Synergizing the Interfacial Bonding and Interlayer Spacing.
basic_science · Level V
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- Record sourced from PubMed, PMID 37310991.
- Also identified by DOI 10.1021/acs.nanolett.3c01307.
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Abstract
MXene fibers are promising candidates for weaveable and wearable energy storage devices because of their good electrical conductivity and high theoretical capacitance. Herein, we propose a nacre-inspired strategy for simultaneously improving the mechanical strength, volumetric capacitance, and rate performance of MXene-based fibers through synergizing the interfacial interaction and interlayer spacing between Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub> nanosheets. The optimized hybrid fibers (M-CMC-1.0%) with 99 wt % MXene loading exhibit an improved tensile strength of ∼81 MPa and a high specific capacitance of 885.0 F cm<sup>-3</sup> at 1 A cm<sup>-3</sup> together with an outstanding rate performance of 83.6% retention at 10 A cm<sup>-3</sup> (740.0 F cm<sup>-3</sup>). As a consequence, the fiber supercapacitor (FSC) based on the M-CMC-1.0% hybrid delivers an output capacitance of 199.5 F cm<sup>-3</sup>, a power density of 1186.9 mW cm<sup>-3</sup>, and an energy density of 17.7 mWh cm<sup>-3</sup>, respectively, implying its promising applications as portable energy storage devices for future wearable electronics.