Development of a Highly Flexible Composite Electrode Comprised of Ti3C2-Based MXene Nanosheets and Ag Nanoparticles

Lim, Hyun-Su; Choi, Su Bin; Kwon, Hanjung; Lim, Jae Kyoo; Han, Chul Jong; Oh, Jae Min; Kim, Jong‐Woong

doi:10.1007/s13391-021-00310-y

Cited by 11 publications

(6 citation statements)

References 27 publications

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“…To begin, 2 g of each precursor powder (LO-MAX, MB-MAX and WEC-MAX) was gradually added over the course of 1 min to 40 mL of etchant solution containing 24 mL of HCl, 4 mL of HF, and 12 mL of deionized water in a PTFE beaker. A detailed preparation process for Ti 3 C 2 T x MXene nanosheets after this can be found elsewhere …”

Section: Methodsmentioning

confidence: 99%

“…A detailed preparation process for Ti 3 C 2 T x MXene nanosheets after this can be found elsewhere. 23 Fabrication of Ti 3 C 2 T x MXene-Decorated Conductive Fabric. For the fabrication of a fibrous pressure sensor, an aqueous dispersion of MXene nanosheets with a concentration of 8 mg/mL and nylon/ polyester fiber-weaved fabric were prepared.…”

Section: Synthesis Of Ti 3 Alc 2 Max With the Conventional Process (M...mentioning

confidence: 99%

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Role of Oxygen in the Ti₃AlC₂ MAX Phase in the Oxide Formation and Conductivity of Ti₃C₂-Based MXene Nanosheets

Choi

Oh²,

Meena

et al. 2023

ACS Appl. Mater. Interfaces

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Ti 3 C 2 T x MXene, a two-dimensional transition metal carbide, has attracted substantial interest due to its unique physical properties and a wide range of potential applications. Although the properties of devices using MXene have been substantially enhanced in recent years, it is not fully understood how the oxygen concentration in Ti 3 AlC 2 MAX affects oxide formation in Ti 3 C 2 -based MXene nanosheets and their fundamental properties. To this end, we compared two types of MAX phases: MAX with low oxygen content (LO-MAX) and MAX synthesized by a conventional process. Since the conventional MAX synthesis employs metal (Ti) as a primary material, it is referred to as metal-based MAX (MB-MAX) from here. The oxygen content of the LO-MAX was only 0.56 wt %, which was about 20% compared to that of MAX synthesized using conventional methods. We compared the properties of MXene nanosheets prepared from the LO-MAX with MXene nanosheets obtained from the MB-MAX. Microscopic and chemical analyses revealed smooth and wrinkle-free morphology and small amounts of oxygen in MXene nanosheets prepared from LO-MAX (LO-MXene). The LO-MXene nanosheet film exhibited an exceptionally high conductivity of 10,540 S/cm and an ultralow surface roughness of 1.7 nm, which originated from inhibited surface oxide formation. Moreover, the inhibition of oxide formation strengthened the function of −O or −OH groups on the surface of MXene, thereby facilitating strong hydrogen bonding to the polymer with hydroxyl groups. To clearly reveal these properties, we prepared a pressure sensor by coating these MXene nanosheets on nylon/polyester fibers. The fabricated sensor exhibited a high sensitivity of up to 85.6/kPa and excellent stretch stability and reliability. These results clearly revealed that lowering the oxygen content in MAX can make a decisive contribution to improving the fundamental properties of MXene nanosheets prepared therefrom.

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Section: Methodsmentioning

confidence: 99%

Section: Synthesis Of Ti 3 Alc 2 Max With the Conventional Process (M...mentioning

confidence: 99%

Role of Oxygen in the Ti₃AlC₂ MAX Phase in the Oxide Formation and Conductivity of Ti₃C₂-Based MXene Nanosheets

Choi

Oh²,

Meena

et al. 2023

ACS Appl. Mater. Interfaces

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“…This procedure was executed repeatedly until the formation of free-standing MXene films was achieved. The entire procedure for the synthesis and purification of Ti 3 C 2 T x MXene nanosheets was conducted in accordance with a previously documented method in the literature …”

Section: Methodsmentioning

confidence: 99%

“…The entire procedure for the synthesis and purification of Ti 3 C 2 T x MXene nanosheets was conducted in accordance with a previously documented method in the literature. 44 Fabrication of Conductive MXene/Fabric. A fabric sample was subjected to oxygen plasma treatment in order to create surface hydroxyl groups under ambient conditions, utilizing an atmospheric pressure plasma treatment instrument (MyPL-Auto-150, APP, Korea).…”

Section: ■ Introductionmentioning

confidence: 99%

Self-Repairing and Energy-Harvesting Triboelectric Sensor for Tracking Limb Motion and Identifying Breathing Patterns

Meena

Khanh

Jung

et al. 2023

ACS Appl. Mater. Interfaces

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The increasing prevalence of health problems stemming from sedentary lifestyles and evolving workplace cultures has placed a substantial burden on healthcare systems. Consequently, remote health wearable monitoring systems have emerged as essential tools to track individuals' health and wellbeing. Self-powered triboelectric nanogenerators (TENGs) have exhibited significant potential for use as emerging detection devices capable of recognizing body movements and monitoring breathing patterns. However, several challenges remain to be addressed in order to fulfill the requirements for self-healing ability, air permeability, energy harvesting, and suitable sensing materials. These materials must possess high flexibility, be lightweight, and have excellent triboelectric charging effects in both electropositive and electronegative layers. In this work, we investigated selfhealable electrospun polybutadiene-based urethane (PBU) as a positive triboelectric layer and titanium carbide (Ti 3 C 2 T x ) MXene as a negative triboelectric layer for the fabrication of an energy-harvesting TENG device. PBU consists of maleimide and furfuryl components as well as hydrogen bonds that trigger the Diels−Alder reaction, contributing to its self-healing properties. Moreover, this urethane incorporates a multitude of carbonyl and amine groups, which create dipole moments in both the stiff and the flexible segments of the polymer. This characteristic positively influences the triboelectric qualities of PBU by facilitating electron transfer between contacting materials, ultimately resulting in high output performance. We employed this device for sensing applications to monitor human motion and breathing pattern recognition. The soft and fibrous-structured TENG generates a high and stable opencircuit voltage of up to 30 V and a short-circuit current of 4 μA at an operation frequency of 4.0 Hz, demonstrating remarkable cyclic stability. A significant feature of our TENG is its self-healing ability, which allows for the restoration of its functionality and performance after sustaining damage. This characteristic has been achieved through the utilization of the self-healable PBU fibers, which can be repaired via a simple vapor solvent method. This innovative approach enables the TENG device to maintain optimal performance and continue functioning effectively even after multiple uses. After integration with a rectifier, the TENG can charge various capacitors and power 120 LEDs. Moreover, we employed the TENG as a self-powered active motion sensor, attaching it to the human body to monitor various body movements for energy-harvesting and sensing purposes. Additionally, the device demonstrates the capability to recognize breathing patterns in real time, offering valuable insights into an individual's respiratory health.

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“…2D MXenes, composed of transition metal carbides, nitrides, and carbonitrides, are obtained by etching “A” element from ternary “MAX” structure, where “M” is a transition metal such as Ti, Mo, V, “A” is Al or Ga, and “X” is C or N. 139 Recently, MXene has drawn tremendous attention due to great conductivity, large surface area, exposed active metal sites, and excellent dispersibility enabling them to be utilized in various applications. 140–142 Interestingly, the unique 2D MXene analogues such as nitrogen-rich Mo 5 N 6 nanosheets and V 0.2 Mo 0.8 N 1.2 solid solution have recently been developed for electrochemical HER. 143–145 Compared with conventional MXenes, they showed significantly enhanced catalytic activity due to their modified electronic state.…”

Section: State-of-the-art 2d Materials For Pec Water Splittingmentioning

confidence: 99%

Two-dimensional materials for photoelectrochemical water splitting

2023

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Development of a Highly Flexible Composite Electrode Comprised of Ti3C2-Based MXene Nanosheets and Ag Nanoparticles

Cited by 11 publications

References 27 publications

Role of Oxygen in the Ti₃AlC₂ MAX Phase in the Oxide Formation and Conductivity of Ti₃C₂-Based MXene Nanosheets

Role of Oxygen in the Ti₃AlC₂ MAX Phase in the Oxide Formation and Conductivity of Ti₃C₂-Based MXene Nanosheets

Self-Repairing and Energy-Harvesting Triboelectric Sensor for Tracking Limb Motion and Identifying Breathing Patterns

Two-dimensional materials for photoelectrochemical water splitting

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Development of a Highly Flexible Composite Electrode Comprised of Ti3C2-Based MXene Nanosheets and Ag Nanoparticles

Cited by 11 publications

References 27 publications

Role of Oxygen in the Ti3AlC2 MAX Phase in the Oxide Formation and Conductivity of Ti3C2-Based MXene Nanosheets

Role of Oxygen in the Ti3AlC2 MAX Phase in the Oxide Formation and Conductivity of Ti3C2-Based MXene Nanosheets

Self-Repairing and Energy-Harvesting Triboelectric Sensor for Tracking Limb Motion and Identifying Breathing Patterns

Two-dimensional materials for photoelectrochemical water splitting

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Role of Oxygen in the Ti₃AlC₂ MAX Phase in the Oxide Formation and Conductivity of Ti₃C₂-Based MXene Nanosheets

Role of Oxygen in the Ti₃AlC₂ MAX Phase in the Oxide Formation and Conductivity of Ti₃C₂-Based MXene Nanosheets