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Keyword Author: energy storage

MXene/carbon based ultra-stable symmetric sodium-ion capacitors for glucose monitoring

Biomass-derived activated carbon and MXenes are promising candidates for high-performance electrochemical energy storage owing to their low cost and excellent charge-storage properties. Herein, we demonstrate a unified single-step molten-salt strategy to synthesize a composite of pumpkin seed-derived activated carbon and Ti3C2Tx MXene in a single pot for sodium-ion capacitor (SIC) applications. In this process, biomass …

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Dual electrode-free Zn-MnO2 battery as a future energy source

Aqueous rechargeable Zn-MnO2 batteries are considered one of the most promising energy storage systems and have been extensively studied in recent years, owing to their high energy density, low cost, and intrinsic safety. However, the practical application of conventional Zn-MnO2 batteries is hindered by poor cycling stability, corrosion, and unwanted side reactions. Recently, dual electrode-free …

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MXene/Bi2O3 Nanocomposites as Supercapacitors for Portable Electronic Devices

2D MXene nanosheets often encounter challenges such as aggregation and restacking, which can significantly decrease their performance in supercapacitor applications. Herein, we prepared the Bi2O3 nanoflowers decorated MXene electrode via the coprecipitation method. The insertion of Bi2O3 nanoflowers over the MXene nanosheet not only effectively resolves the restacking challenge of the MXene nanosheet but also …

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Materials for aluminum batteries: Progress and challenges

Aluminum battery technologies, including Al-air, Al-ion, and Al-sulfur (Al-S), are considered promising energy storage systems because of their high theoretical capacity, abundance of resources, low cost, and environmental friendliness. Despite these benefits, there are still some critical challenges such as the formation of passivation layers, anodic corrosion, poor electrochemical performance, the polysulfide shuttle effect, and …

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High Performance MXene/MnCo2O4 Supercapacitor Device for Powering Small Robotics

The development of advanced energy storage devices is critical for various applications including robotics and portable electronics. The energy storage field faces significant challenges in designing devices that can operate effectively for extended periods while maintaining exceptional electrochemical performance. Supercapacitors, which bridge the gap between batteries and conventional capacitors, offer a promising solution due to …

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Real Time Tracking of Nanoconfined Water-Assisted Ion Transfer in Functionalized Graphene Derivatives Supercapacitor Electrodes

Water molecules confined in nanoscale spaces of 2D graphene layers have fascinated researchers worldwide for the past several years, especially in the context of energy storage applications. The water molecules exchanged along with ions during the electrochemical process can aid in wetting and stabilizing the layered materials resulting in an anomalous enhancement in the performance …

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MXene-Based Nanocomposites for Supercapacitors: Fundamentals and Applications

MXene-based nanocomposite materials with other 2D materials have made a large impact in the field of energy storage, particularly in the area of supercapacitors. Combining conductive 2D MXene with other 2D materials, such as transition metal oxide, transition metal dichalcogenides, and layered double hydroxide, improves the electrochemical energy storage properties of resulting MXene-based nanocomposites. The …

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MXene and polyaniline coated 3D-printed carbon electrode for asymmetric supercapacitor

3D printing has emerged as an attractive manufacturing technique in supercapacitor electrodes owing to the precise and customisable fabrication of complex electrode designs, enhancing the performance and efficiency of the device. Despite the advantages, 3D-printed electrodes are limited by their low conductivity and electrochemical properties, predominantly due to the lack of availability of suitable conductive …

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Multiscale hierarchical nanoarchitectonics with stereographically 3D-printed electrodes for water splitting and energy storage

The pursuit of sustainable solutions to address the global energy crisis has led to a keen interest in the advancement of cost-effective and multifunctional electrochemical systems. These systems aim to achieve both zero-carbon emissions and the dual capability to convert and store energy efficiently. The electrochemical splitting of water is one way to create carbon–neutral, …

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Integrated free-standing WS2 3D-printed carbon supercapacitor with solid state electrolyte

There is a huge need for energy storage devices due to the depletion of natural gas and the increasing requirement for portable electronic gadgets. Fused deposition modeling (FDM) 3D-printing has drawn tremendous interest for the fabrication of batteries and supercapacitors (SCs) due to its tabletop manufacturing technique, bespoke design, fast prototyping and user-friendly process. However, …

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2D Germanane-MXene Heterostructures for Cations Intercalation in Energy Storage Applications

Heterostructures offer an exceptional possibility of combining individual 2D materials into a new material having altered properties compared to the parent materials. Germanane (GeH) is a 2D material with many favorable properties for energy storage and catalysis, however, its performance is hindered by its low electrical conductivity. To address the low electrochemical performance of GeH, …

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Nanoscopic decoration of multivalent vanadium oxide on Laser-Induced graphene fibers via atomic layer deposition for flexible gel supercapacitors

Composite materials for high energy/power density supercapacitors are of very high importance. The precise well-defined nanoarchitectonics approach is a key element in the construction of high-performance devices. Surface redox reactions that frequently involve the exchange of oxygen atoms are fundamental to pseudocapacitive reactions mostly mediated by transition metal oxides (TMO). This process often changes the …

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Metal Phosphorous Trichalcogenides (MPCh(3)): From Synthesis to Contemporary Energy Challenges

Owing to their unique physical and chemical properties, layered two-dimensional (2D) materials have been established as the most significant topic in materials science for the current decade. This includes layers comprising mono-element (graphene, phosphorene), di-element (metal dichalcogenides), and even multi-element. A distinctive class of 2D layered materials is the metal phosphorous trichalcogenides (MPCh(3), Ch=S, Se), …

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Graphene Nanobubbles Produced by Water Splitting

Graphene nanobubbles are of significant interest due to their ability to trap mesoscopic volumes of gas for various applications in nanoscale engineering. However; conventional protocols to produce such bubbles are relatively elaborate and require specialized equipment to subject graphite samples to high temperatures or pressures. Here, we demonstrate, the formation of graphene nanobubbles between layers …

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The Electrochemistry of Carbon Nanotubes: Fundamentals and Applications

Carbon nanotubes (CNTs) are in the forefront of electrochemical research. It has become clear that an understanding of the fundamental reasons for the electrochemical activity of CNTs is essential for further progress in the field. This review provides a critical discussion of the fundamental reasons behind the electrochemical and “electrocatalytic” activity of CNTs as well …

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