Perspectives on solution processing of two-dimensional MXenes

Abdolhosseinzadeh, Sina; Jiang, Xiantao; Zhang, Han; Qiu, Jieshan; Zhang, Chuanfang

doi:10.1016/j.mattod.2021.02.010

Cited by 229 publications

(187 citation statements)

References 197 publications

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“…However, since inks exhibit significant shear‐thinning behavior, which follows the Ostwald‐de Waele model (

η = K {\dot{γ}}^{n - 1}

; Figure 2d), the viscosity drops down to much lower values at high shear rates, making them suitable for processing by various coating techniques (e. g. blade coating). From the double logarithmic plot of viscosity vs. shear rate (Figure 2d inset) and fitting a line to its linear region, the power‐law index which is a measure of the pseudoplasticity of the ink [31] was calculated to be ∼0.1. Both porous and compact films showcase almost identical Raman spectra (Figure 2e) with all the expected vibrational modes of Ti 3 C 2 T x [32] .…”

Section: Resultsmentioning

confidence: 99%

Coating Porous MXene Films with Tunable Porosity for High‐Performance Solid‐State Supercapacitors

2021

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Two-dimensional MXenes with their outstanding physical and chemical properties have been extensively used in numerous fields such as electrochemical energy storage, catalysis, and sensing. In these applications, high active surface area and facilitated diffusion of ions/atoms/molecules are crucial. While these features can be offered by porous films and structures, their fabrication at ambient conditions, especially with scalable methods such as printing and coating has proven to be quite challenging. Here, we have developed MXene inks containing a space-holder agent, based on which porous films with tunable porosities can be easily coated. The whole fabrication process lasts only a few minutes and is carried out at room temperature and pressure, making it suitable for continuous scalable production. Films with different porosities (up to 80 %) have been coated and used for the fabrication of solid-state microsupercapacitors with enhanced rate capability and improved capacitance (241 mF/cm 2 ).

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“…However, since inks exhibit significant shear‐thinning behavior, which follows the Ostwald‐de Waele model (

η = K {\dot{γ}}^{n - 1}

Section: Resultsmentioning

confidence: 99%

Coating Porous MXene Films with Tunable Porosity for High‐Performance Solid‐State Supercapacitors

2021

Self Cite

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“…A frequency sweep (Fig. 6c, d) was used to confirm that G ′ /G ′′ and G ′ > 10 4 Pa at a wide range of timescales, and G ′ /G ′′ was in fact found to remain within the range deemed desirable for extrusion printing by Akuzum et al (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) [11,29]. DIW of MSC's was accomplished using 230-600 μm syringe tips.…”

Section: Wwwmrsorg/jmrmentioning

confidence: 99%

Investigating the rheology of 2D titanium carbide (MXene) dispersions for colloidal processing: Progress and challenges

Greaves

Mende

Wang

et al. 2021

Journal of Materials Research

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Among 2D materials, MXenes (especially their most studied member, titanium carbide) present a unique opportunity for application via colloidal processing, as they are electrically conductive and chemically active, whilst still being easily dispersed in water. And since the first systematic study of colloidal MXene rheology was published in 2018 (Rheological Characteristics of 2D Titanium Carbide (MXene) Dispersions: A Guide for Processing MXenes by Akuzum, et al.), numerous works have presented small amounts of rheological data which together contribute to a deeper understanding of the topic. This work reviews the published rheological data on all MXene-containing formulations, including liquid crystals, mixtures and non-aqueous colloids, which have been used in processes such as stamping, patterning, 2D and 3D printing. An empirical model of aqueous titanium carbide viscosity has been developed, and recommendations are made to help researchers more effectively present their data for future rheological analysis. Graphic abstract

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“…Generally, the setup includes the mesh screen with little gap between the substrate. With the help of squeegee, the ink is flooded over the screen mesh to print on the substrate [57]. Screen printing gained considerable attention to directly print MXene ink-based electrodes directly on a target substrate.…”

Section: Screen Printingmentioning

confidence: 99%

Two-Dimensional MXene Based Materials for Micro-Supercapacitors

Sharma¹,

Rout²

2022

Supercapacitors for the Next Generation

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With the boom in the development of micro-electronics for wearable and flexible electronics, there is a growing demand for micro-batteries and micro-supercapacitors (MSCs). Micro-supercapacitors have garnered a considerable attention for the evolution of these energy storage micro-systems. The choice of electrode material plays a pivotal role in the fabrication and development of MSCs. Recently, a new emerging family of two-dimensional transition metal (M) carbides or nitrides (X) cited as 2D MXene has emerged as a novel material. Due to its exceptionally high electronic conductivity ̴10,000 S cm−1, high charge storage capacity and easy processing capability helps to use MXene as the promising candidate for micro-supercapacitors electrodes. Taking the advantage of such exceptional properties. MXenes have been explored enormously in stacked as well as in interdigital architecture for on-chip micro-supercapacitors (MSCs). This book chapter includes a recent advancement of MXene based MSCs, with a brief overview of synthesis and fabrication techniques.

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Perspectives on solution processing of two-dimensional MXenes

Cited by 229 publications

References 197 publications

Coating Porous MXene Films with Tunable Porosity for High‐Performance Solid‐State Supercapacitors

Coating Porous MXene Films with Tunable Porosity for High‐Performance Solid‐State Supercapacitors

Investigating the rheology of 2D titanium carbide (MXene) dispersions for colloidal processing: Progress and challenges

Two-Dimensional MXene Based Materials for Micro-Supercapacitors

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