Scalable solid-state synthesis of 2D transition metal oxide/graphene hybrid materials and their utilization for microsupercapacitors

Yang, Muxuan; Kasbe, Pratik; Bu, Jinyu; Xu, Weinan

doi:10.1039/d4nr00587b

Cited by 3 publications

(2 citation statements)

References 77 publications

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“…The first one with well-defined lattice fringes and d spacing of 0.35 nm corresponds to 2D Fe 2 O 3 , and the other one with lower contrast and large spacing (0.44 nm) corresponds to the rGO domain. Other characterization such as XRD and UV-Vis of the 2D Fe 2 O 3 /rGO nanocomposites can be found in our recent report [38].…”

Section: Synthesis and Characterization Of 2d Fe 2 O 3 And Its Nanoco...mentioning

confidence: 95%

“…One unique character of our approach is that the synthesized Fe 2 O 3 has a 2D morphology. The reaction mechanism was discussed in our recent study [38]. Briefly, the electric field from microwave irradiation acts in a static plane (with a sinusoidal magnitude over time), and this facilitates the atoms' rearrangement in a 2D plane.…”

Section: Synthesis and Characterization Of 2d Fe 2 O 3 And Its Nanoco...mentioning

confidence: 99%

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Two-dimensional iron oxide/graphene-based nanocomposites as high-performance solid lubricants

Kasbe,

Yang,

Bosch

et al. 2024

2D Mater.

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Beyond conventional 2D layered materials such as graphene and transition metal dichalcogenides, 2D metal oxides have also received much interest in recent years. They have unique electronic (such as 2D TiO2 and MoO2), catalytic (such as 2D CeO2 and MnO2), and magnetic properties (such as 2D Fe2O3) compared with bulk metal oxides due to their atomically thin structures. Certain types of 2D metal oxides also have the potential to be a new type of high-performance solid lubricants due to the tunable interlayer interaction and possibility for 2D heterostructure formation, but this remains largely unexplored. In this work, we developed a scalable microwave-assisted solid-state synthesis of 2D Fe2O3 and their nanocomposites with reduced graphene oxide (rGO). The 2D Fe2O3/rGO nanocomposites were systematically characterized by electron microscopies and spectroscopies, and their utilization as solid lubricants was studied by pin-on-disk tribometer on both silicon and steel substrates. The results show that due to the easy sliding between 2D Fe2O3 and rGO nanosheets and their unique magnetic-induced assembled morphology, low coefficient of friction (COF) can be achieved for both steel-silicon and steel-steel interfaces. Superlubricity (COF ∼ 0.007) can be achieved for the 2D Fe2O3/rGO nanocomposite with a GO primer layer on a steel substrate. This work provides new insights into the development of functional 2D nanocomposites and expands their applications to solid lubrication and beyond.

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Section: Synthesis and Characterization Of 2d Fe 2 O 3 And Its Nanoco...mentioning

confidence: 95%

Section: Synthesis and Characterization Of 2d Fe 2 O 3 And Its Nanoco...mentioning

confidence: 99%

Two-dimensional iron oxide/graphene-based nanocomposites as high-performance solid lubricants

Kasbe,

Yang,

Bosch

et al. 2024

2D Mater.

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Exploring advanced microwave strategy for the synthesis of two-dimensional energy materials

Cai,

Wu,

Wang

et al. 2024

Applied Physics Reviews

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The rapid pace of technology and increasing energy demands underscore the urgent need for eco-friendly materials with exceptional energy conversion and storage capabilities. Two-dimensional (2D) energy materials, characterized by unique physicochemical properties, hold great promise in renewable energy conversion, catalysis, and electronics. Nevertheless, conventional synthesis methods often falter in balancing high quality, high yield, and cost-effectiveness, presenting substantial obstacles to their large-scale application. Microwave-assisted synthesis, characterized by its rapid and efficient process, emerges as a promising approach to surmount these limitations. This review meticulously examines the pivotal role of microwave-assisted synthesis in the preparation of 2D materials, highlighting its profound impact on enhancing material quality and production efficiency. By scrutinizing the unique physical properties of microwaves and their applications in material synthesis, the review elucidates the innovative contributions of microwave technology to materials science. Furthermore, it delves into the intricate influence of microwave parameter control on the synthesis process and resultant material properties, offering insight into the potential of microwave technology for the precise modulation of material structure and functionality. This comprehensive analysis underscores microwave-assisted synthesis as a viable solution for overcoming current challenges, thereby advancing the development of high-performance 2D energy materials.

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3D Binder-Free Mo@CoO Electrodes Directly Manufactured in One Step via Electric Discharge Machining for In-Plane Microsupercapacitor Application

Yang,

Chen,

Huang

et al. 2024

Micromachines

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Cobalt oxide-based in-plane microsupercapacitors (IPMSCs) stand out as a favorable choice for various applications in energy sources for the Internet of Things (IoT) and other microelectronic devices due to their abundant natural resources and high theoretical specific capacitance. However, the low electronic conductivity of cobalt oxide greatly hinders its further application in energy storage devices. Herein, a new manufacturing method of electric discharging machining (EDM), which is simple, safe, efficient, and environment-friendly, has been developed for synthesizing Mo-doped and oxygen-vacancy-enriched Co-CoO (Mo@Co-CoO) integrated microelectrodes for efficiently constructing Mo@Co-CoO IPMSCs with customized structures in a single step for the first time. The Mo@Co-CoO IPMSCs with three loops (IPMSCs3) exhibited a maximum areal capacitance of 30.4 mF cm−2 at 2 mV s−1. Moreover, the Mo@Co-CoO IPMSCs3 showed good capacitive behavior at a super-high scanning rate of 100 V s−1, which is around 500–1000 times higher than most reported CoO-based electrodes. It is important to note that the IPMSCs were fabricated using a one-step EDM process without any assistance of other material processing techniques, toxic chemicals, low conductivity binders, exceptional current collectors, and conductive fillers. This novel fabrication method developed in this research opens a new avenue to simplify material synthesis, providing a novel way for realizing intelligent, digital, and green manufacturing of various metal oxide materials, microelectrodes, and microdevices.

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Scalable solid-state synthesis of 2D transition metal oxide/graphene hybrid materials and their utilization for microsupercapacitors

Abstract: Two-dimensional metal oxide (MO) nanostructures have unique properties compared with their bulk or 0D and 1D (nanoparticle and nanowires) counterparts. Their abundant surface area and atomically thin 2D structure are...

Cited by 3 publications

References 77 publications

Two-dimensional iron oxide/graphene-based nanocomposites as high-performance solid lubricants

Two-dimensional iron oxide/graphene-based nanocomposites as high-performance solid lubricants

Exploring advanced microwave strategy for the synthesis of two-dimensional energy materials

3D Binder-Free Mo@CoO Electrodes Directly Manufactured in One Step via Electric Discharge Machining for In-Plane Microsupercapacitor Application

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