Key Takeaways & Executive Findings
- •• Carbon-based hybrid materials, combining carbon forms with inorganic nanoparticles, enhance supercapacitor performance through improved charge and energy transfer. • Key carbon materials include MXenes, graphene, carbon nanotubes, and activated carbon, which offer high surface area and electrical conductivity. • Hybridization with metal oxides, sulfides, and conducting polymers boosts specific capacitance and cycling stability. • Advanced manufacturing techniques such as electrospinning and 3D printing enable precise structural design for next-generation supercapacitors.
Abstract
Supercapacitors are gaining popularity due to their high cycling stability, power density, and fast charge and discharge rates. Researchers are exploring electrode materials, electrolytes, and separators for cost-effective energy storage systems. Advances in materials science have led to the development of hybrid nanomaterials, such as combining filamentous carbon forms with inorganic nanoparticles, to create new charge and energy transfer processes. Notable materials for electrochemical energy-storage applications include MXenes, 2D transition metal carbides, and nitrides, carbon black, carbon aerogels, activated carbon, carbon nanotubes, conducting polymers, carbon fibers, and nanofibers, and graphene, because of their thermal, electrical, and mechanical properties. Carbon materials mixed with conducting polymers, ceramics, metal oxides, transition metal oxides, metal hydroxides, transition metal sulfides, transition metal dichalcogenide, metal sulfides, carbides, nitrides, and biomass materials have received widespread attention due to their remarkable performance, eco-friendliness, cost-effectiveness, and renewability. This article explores the development of carbon-based hybrid materials for future supercapacitors, including electric double-layer capacitors, pseudocapacitors, and hybrid supercapacitors. It investigates the difficulties that influence structural design, manufacturing (electrospinning, hydrothermal/solvothermal, template-assisted synthesis, electrodeposition, electrospray, 3D printing) techniques and the latest carbon-based hybrid materials research offer practical solutions for producing high-performance, next-generation supercapacitors.
1. Introduction
Energy is of fundamental importance for the well-being, economy and development of society[1]. Approximately 85% of the world's principal energy supply originates from fossil fuels, specifically oil, coal and gas[2–3]. Energy supply is crucial for the functioning of modern society[4–7]. Energy storage encompasses different energies, technologies, sizes, and applications. Numerous electrical energy storage (EES) approaches have been created[8–9], including chemical, thermal, mechanical, electrical, and electrochemical methods. In the last decade, portable electronic systems have evolved significantly by introducing various sensors and flexible electronics[10–11].
Portable energy storage systems, including batteries, fuel cells, and supercapacitors (SCs), are becoming increasingly important. Batteries can be used to store and generate energy for various purposes. Lithium-ion batteries (LIBs) are now the dominating market for advanced energy sources in various fields, such as electronics, electric vehicles, and energy storage systems[12]. SCs and rechargeable batteries are essential for electric vehicles (EVs). The rechargeable battery determines the distance that an EV can drive on a single charge, while the SC provides the energy for rapid acceleration. The SC can provide extra power for a few seconds, up to a maximum of 15 s, and recharges automatically using electronic systems. The development of EES systems is facing a significant demand for materials[13–14]. Due to their advantageous properties, such as fast charging (1–10 s) and improved cycling stability[15], SCs have attracted more attention than batteries. To attain a higher capacity than typical SCs, electrode materials with a wide surface area and thin electrolytic dielectric are required.
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Theodore Azemtsop Manfo, Hannu Laaksonen (2025). A review of carbon-based hybrid materials for supercapacitors. SinoTechIntel Verified Research. https://doi.org/10.1016/S1872-5805(NCM2025-40-01-03)
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Frequently Asked Questions
What are carbon-based hybrid materials for supercapacitors?
Carbon-based hybrid materials combine carbon forms (e.g., graphene, carbon nanotubes) with inorganic nanoparticles or polymers to enhance supercapacitor performance by improving charge transfer, surface area, and stability.
Why are supercapacitors important for energy storage?
Supercapacitors offer high power density, fast charge/discharge rates, and excellent cycling stability, making them ideal for applications requiring rapid energy delivery, such as electric vehicles and portable electronics.
What are the key materials used in carbon-based hybrid supercapacitors?
Key materials include activated carbon, carbon nanotubes, graphene, MXenes, and hybrids with metal oxides, sulfides, and conducting polymers, which provide high specific capacitance and conductivity.
What manufacturing techniques are used for carbon-based hybrid materials?
Common techniques include electrospinning, hydrothermal/solvothermal synthesis, template-assisted synthesis, electrodeposition, electrospray, and 3D printing, which allow precise control over structure and morphology.
What are the challenges in developing carbon-based hybrid supercapacitors?
Challenges include optimizing structural design, achieving uniform dispersion of components, scaling up production, and balancing cost with performance for commercial viability.
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