Enhancing pseudocapacitive intercalation in Ti₃C₂T _x MXene with molecular crowding electrolytes

The growing demand for safe, cost-efficient, high-energy and high-power electrochemical energy storage devices has stimulated the development of aqueous-based supercapacitors with high capacitance, high rate capability, and high voltage. 2D titanium carbide MXene-based electrodes have shown excellent rate capability in various dilute aqueous...

Structural Supercapacitor: A Proof of Concept and Performance Characterisation

A structural supercapacitor (SSC) is a composite material that bears mechanical loads and stores energy, and its encapsulation method of the device is vital for scale-up. Here we present an SSC with an encapsulation interface consisting of spread-tow fabric electrodes and glass fabric encapsulators infused with epoxy resin. Through surface...

Monolithic fiber/foam-structured catalysts: beyond honeycombs and micro-channels

Heterogeneous catalysis plays a pivotal role in the current chemical and energy vectors production. Notably, to fully utilize the intrinsic activity and selectivity of a catalyst, the chemical reactor has to be designed and operated optimally to achieve enhanced heat/mass transfer, well-defined contact time of reactants, uniform flow pattern,...

Thickness-Independent Capacitive Performance of Holey Ti₃C₂T_x Film Prepared through a Mild Oxidation Strategy

The Ti₃C₂T_x film with metallic conductivity and high pseudo-capacitance holds profound promise in flexible high-rate supercapacitors. However, the restacking of Ti₃C₂T_x sheets hinders ion access to thick film electrodes. Herein, a mild yet green route has been developed to...

Effect of pinholes in Nb₄C₃ MXene sheets on its electrochemical behavior in aqueous electrolytes

Two-dimensional (2D) niobium carbide, Nb₄C₃T_x (T_x: O, OH, and F), a representative member of the 43 MXene structural motif, has shown promising electrochemical performance in acidic electrolytes. The capacitive performance of Nb₄C₃T_x in neutral aqueous electrolytes...

Layer-by-Layer Electrode Fabrication for Improved Performance of Porous Polyimide-Based Supercapacitors

Nanoporous polymers are becoming increasingly interesting materials for electrochemical applications, as their large surface areas with redox-active sites allow efficient adsorption and diffusion of ions. However, their limited electrical conductivity remains a major obstacle in practical applications. The conventional approach that alleviates...

Autonomous Temperature Sensor for Smart Agriculture: Energy Harvesting and Control

Many countries in the world face the problem of fruit frost during spring, which results in the loss of harvested crops. Solutions exist to prevent the fruit to freeze, however this requires that the temperature is known. Therefore, a smart autonomous temperature sensor network is designed that is capable of acquiring a 3D temperature profile of...

Battery – Supercapacitor Hybrid Energy Storage System: A Practical Approach to Improve Lifecycle Performance of Seagoing Vessels

For many maritime applications Li-Ion batteries are foreseen as energy storage units that can improve the performance of the on-board power system in terms of continuity of service, fuel consumption, emissions and running hours of main engines. However, one of main limitations of battery application in on-board power systems is the aging of...

Zero-emission double ended ferries: A concept exploration study

The goal of this thesis has been to develop a concept exploration tool for zero-emission double ended ferries, that determines the feasibility of different energy systems, creates corresponding design parameters and helps decide between zero-emission energy types. <br/><br/>The research goal was achieved in three steps. Firstly, knowledge was...

Laser-induced Periodic Surface Structures (LIPSS) on heavily boron-doped diamond for electrode applications

Diamond is known as a promising electrode material in the fields of cell stimulation, energy storage (e.g., supercapacitors), (bio)sensing, catalysis, etc. However, engineering its surface and electrochemical properties often requires costly and complex procedures with addition of foreign material (e.g., carbon nanotube or polymer) scaffolds...

Integrating a photovoltaic storage system in one device: A critical review

Due to the variable nature of the photovoltaic generation, energy storage is imperative, and the combination of both in one device is appealing for more efficient and easy‐to‐use devices. Among the myriads of proposed approaches, there are multiple challenges to overcome to make these solutions realistic alternatives to current systems. This...

Hybrid solutions for cutter suction dredgers: A feasibility study on the application of electrical energy storage

Cutter suction dredgers are a type of hydraulic dredgers often used in areas with hard soil where other types of dredging vessels would be ineffective. As a result of the wide range of type of soil that is being cut a lot of variation is seen in the power demand on the cutter suction dredger's diesel-electric power generation system....

Concept Design of Hybrid Crane Vessel

Heerema Marine Contractors operates large crane vessels, which are exploited for installation works in the offshore oil and gas industry. The benchmark power system of these crane vessels is diesel electric meaning that the main engines are driving alternators for generating electric power. But due to spiky power demand and strict redundancy...

Review of residential PV-storage architectures

This paper focuses on the most common PV-storage architectures that are designed for residential applications and that incorporate storage devices like batteries, hydrogen systems, supercapacitors, and flywheels. The main motivations and a comparison of the advantages and disadvantages of the architectures are presented. Moreover, some common...

High aspect-ratio MEMS devices for the next generation of THz/MHz passive components

The realization of efficient passive devices directly on chip represents one of the most intriguing challenges in IC fabrication processes. The performance of such devices are intrinsically determined by physical parameters that cannot be easily scaled, making the on-chip integration of such components a complex task to solve. To pursue the...

Mitigation of Voltage Sags in Industrial Power Plants with Medium Voltage DC Distribution System

Unplanned downtime in industrial power systems causes high loss of revenues. These downtimes are often caused by voltage sags of durations up to 1 s. Currently many systems exist which can help to mitigate these voltage sags such as Dynamic Voltage Restorer, UPS and FACTS based devices. With the recent development in semiconductors the voltage...

Energy Storage and Power Management for Typical 4Q-Load

Diesel generators in small electricity grids are mostly not used in a very efficient way. The reason for this is twofold. First of all, the efficiency of a diesel generator is dependent on the ratio determined by the average power divided by the peak power of the generator. The smaller this ratio is, the lower the efficiency. Furthermore, some...