MXene materials based printed flexible devices for healthcare, biomedical and energy storage applications

Materials Today, Год журнала: 2021, Номер 43, С. 99 - 131

Опубликована: Фев. 6, 2021

The advent of cost effective printed smart devices has revolutionized the healthcare sector by allowing disease prediction and timely treatment through non-invasive real time continuous health monitoring. Future advancements in electronic (PE) materials will continue to enhance quality human living. For any PE application, should possess proper mechanical integrity resistivity while being non-toxic. In case sensing for physiological biochemical signals, excellent conductivity is an essential requirement obtaining high response signals. emergence novel class 2D called MXenes their composites resulted structures hugely relevant devices. Exploiting solution based MXene can expedite practical application overcoming present limitations conductive inks such as poor alternative functional inks. There been much progress ink generation its device applications since discovery 2011. This review summarizes formulation additive patterning development enabled them healthcare, biomedical related power provision applications.

Язык: Английский

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A Multi‐Scale Structural Engineering Strategy for High‐Performance MXene Hydrogel Supercapacitor Electrode

Advanced Science, Год журнала: 2021, Номер 8(18)

Опубликована: Авг. 2, 2021

MXenes as an emerging two-dimensional (2D) material have attracted tremendous interest in electrochemical energy-storage systems such supercapacitors. Nevertheless, 2D MXene flakes intrinsically tend to lie flat on the substrate when self-assembling electrodes, leading highly tortuous ion pathways orthogonal current collector and hindering accessibility. Herein, a facile strategy toward multi-scale structural engineering is proposed fabricate high-performance hydrogel supercapacitor electrodes. By unidirectional freezing of slurry followed by designed thawing process sulfuric acid electrolyte, electrode endowed with three-dimensional (3D) open macrostructure impregnated sufficient electrolyte H+ -intercalated microstructure, which provide abundant active sites for storage. Meanwhile, ordered channels bring through-electrode electron transportation that facilitate infiltration mass exchange between electrode. Furthermore, this can also be extended fabrication 3D-printed all-MXene micro-supercapacitor (MSC), delivering ultrahigh areal capacitance 2.0 F cm-2 at 1.2 mA retaining 60 together record-high energy density (0.1 mWh 0.38 mW ).

Язык: Английский

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Strategies toward High-Loading Lithium–Sulfur Batteries

ACS Energy Letters, Год журнала: 2022, Номер 8(1), С. 116 - 150

Опубликована: Ноя. 22, 2022

A high sulfur loading is an essential prerequisite for the practical application of lithium–sulfur batteries. However, it will inevitably exacerbate shuttling effect and slow down polysulfide conversion kinetics. To obtain desirable electrochemical performance at a level loading, adsorption catalysis dual strategies are widely reported to solve severe sluggish reaction kinetics issues. This review mainly summarizes research on batteries with (>5 mg cm–2) based adsorption–catalysis promotion strategies. Specifically, we principle technical challenges recent advancements in electrode materials design, as well potential approaches suggestions constructing next-generation loading. provide guidance energy density power under offer better reference researchers choose adsorbents catalysts.

Язык: Английский

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One‐Pot Green Process to Synthesize MXene with Controllable Surface Terminations using Molten Salts

Angewandte Chemie International Edition, Год журнала: 2021, Номер 60(52), С. 27013 - 27018

Опубликована: Окт. 9, 2021

Surface terminations of two-dimensional MXene (Ti3 C2 Tx ) considerably impact its physicochemical properties. Commonly used etching methods usually introduce -F surface or metallic impurities in MXene. We present a new molten-salt-assisted electrochemical method to synthesize fluorine-free Ti3 Cl2 . Using electrons as reaction agents, cathode reduction and anode can be spatially isolated; thus, no metallics are the product. The situ modified from -Cl -O and/or -S, which shortens modification steps enriches variety terminations. obtained -O-terminated excellent electrode materials for supercapacitors, exhibiting capacitances 225 F g-1 at 1.0 Ag-1 , good rate performance (91.1 % 10 ), capacitance retention (100 after 10000 charge/discharge cycles is superior multi-layered prepared by other methods.

Язык: Английский

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Ti₃C₂MXene–polymer nanocomposites and their applications

Journal of Materials Chemistry A, Год журнала: 2021, Номер 9(13), С. 8051 - 8098

Опубликована: Янв. 1, 2021

Favorable interactions between polymer chains and Ti₃C₂MXene flakes are essential to develop state-of-the-art MXene/polymer nanocomposite devices.

Язык: Английский

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