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All‐Solid‐State Flexible Fiber‐Based MXene Supercapacitors
Author(s) -
Hu Minmin,
Li Zhaojin,
Li Guoxian,
Hu Tao,
Zhang Chao,
Wang Xiaohui
Publication year - 2017
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.201700143
Subject(s) - materials science , supercapacitor , capacitance , capacitor , fiber , mxenes , composite material , nanotechnology , electrode , optoelectronics , electrical engineering , voltage , chemistry , engineering
Flexible fiber‐shaped supercapacitors are promising energy‐storage devices in wearable smart electronics. Exploring the knittable fiber‐type electrode with high capacitance would promote the wide‐scale application of such capacitors. Herein, a solution‐processed methodology to fabricate all‐solid‐state, flexible, and fiber‐based supercapacitors employing Ti 3 C 2 T x MXene is proposed. Commercially available silver‐plated nylon fibers are chosen as fibrous structural support for the first time. Through mildly baking the surfactant‐free Ti 3 C 2 T x flakes suspension loaded on the silver‐plated nylon fibers, a uniform and adhesive film consisting of Ti 3 C 2 T x nanometer‐thick flakes is well established in a parallel manner on the highly conductive fibrous support. It is emphasized that the chemically cross‐linked polyvinyl alcohol–H 2 SO 4 hydrogel is served as a solid‐state electrolyte that guarantees the structural integrity and mechanical strength of the assembled capacitor. The fabricated capacitor exhibits a high areal capacitance of 328 mF cm −2 with excellent cyclability and flexibility, capacitance retention remaining at least above 80% under various deformation modes including bending, twisting, and knotting. The device based on the all‐solid‐state, fiber‐type capacitors can drive a light‐emitting diode. This work proposes a feasible strategy, offering a platform for rational designs of flexible electronics employing a large family of MXenes and their heterostructures as well.