Wearable and Flexible All‐Solid‐State Supercapacitor Based on MXene and Chitin

Abstract

Biopolymer‐based materials have recently received great interest as potential components for wearable energy‐storage devices. They can offer attractive and valuable properties such as renewability, biocompatibility, thermal and chemical stability, flexibility, durability, and biodegradability. Herein, a wearable and flexible all‐solid‐state supercapacitor that uses chitin as a biocompatible scaffold for integrating all device components, such as electrodes and an electrolyte, is developed. Chitin provides mechanical stability to electrode materials and supports the ionic liquid‐based gel electrolyte, and it also acts as a bonding agent to integrate all those components. Additionally, titanium carbide MXene is used as an active material for the proposed power source device. The MXene/chitin‐based all‐solid‐state supercapacitor exhibits impressive electrochemical performance, showing outstanding electrode conductivity, high capacitance, low internal resistance, high power density, and long‐term cycling stability. Moreover, it provides highly desired features concerning wearable devices, that is, excellent flexibility and mechanical strength under bending deformations, as well as sustainability and biodegradability. As a proof of concept, the MXene/chitin‐base device is applied for powering an electronic gadget. Herein, an important step is represented toward power‐efficient, wearable, and sustainable energy‐storage devices.

Biomass‐based materials for advanced supercapacitor: principles, progress, and perspectives

“…The electrolyte has an ionic conductivity of 8.5 ± 0.4 mS cm −1 . [ 125 ] Rana et al. synthesized a sustainable cellulose‐based dual‐network ionic gel electrolyte.…”

“…The electrolyte has an ionic conductivity of 8.5 ± 0.4 mS cm −1 . [125] Rana et al synthesized a sustainable cellulose-based dual-network ionic gel electrolyte. Cellulose was first dissolved with an ionic mixture to form a cellulose network.…”

Untapped Potential of Deep Eutectic Solvents for the Synthesis of Bioinspired Inorganic–Organic Materials

“…By understanding the structure–property relations in biominerals, as synthetic chemists and materials engineers, it would be beneficial to use 3D-printing and a wider palette of building blocks (in contrast to natural organisms) that will enable the development of a new generation of biomimetic materials that will even outperform the natural structures. Therefore, much attention should be paid to the 3D-printing-assisted fusion of biopolymers, electroconductive DESs, and inorganic constituents (i.e., MXenes, , MOFs, perovskites, POSS, M x O y − ) that will mimic the structural hierarchy found in biominerals. Such a new fabrication technique combined with unique stability of DESs could enable the design and fabrication of the smart structures that are lightweight yet strong for biomimetically soft robotics .…”

Graphene-like emerging 2D materials: recent progress, challenges and future outlook

“…359 Flexible solid-state supercapacitors have attracted a lot of interest for all types of electrochemical energy storage due to the fast development of modern wearable electronics. [360][361][362][363][364][365] The fabrication of transparent electronic devices (TEDs) demands a fast charge-discharge rate, high capacitive nature, energy density, and long life under any distorting conditions. Highperformance capacitors must have a high current ow and low energy wastage.…”