Fuel Cell Technologies and Applications

Fuel cells are electrochemical devices that convert chemical energy directly into electrical energy through redox reactions, offering high efficiencies and near-zero emissions when fuelled by hydrogen or other clean fuels. Several principal types have been developed to meet diverse applications: proton exchange membrane fuel cells (PEMFCs) operate at low to moderate temperatures and are prized for their rapid start-up and high power density, making them suitable for automotive, portable and backup power systems; solid oxide fuel cells (SOFCs) function at high temperatures and are well suited to stationary power generation, combined heat and power networks and industrial processes; alkaline fuel cells (AFCs), molten carbonate fuel cells (MCFCs) and phosphoric acid fuel cells (PAFCs) occupy intermediate niches, balancing cost, durability and operating conditions for specialised applications. Advances in materials science, notably in membranes, catalysts and interconnects, have driven improvements in durability, power density and cost reduction, while system-level engineering has enhanced thermal management and balance-of-plant integration. Globally, fuel cells are being deployed in transport fleets, residential and commercial cogeneration, remote and off-grid installations, and even aviation prototypes, underpinning decarbonisation strategies and energy security. The modularity of fuel cell stacks allows flexible scaling from watts to megawatts, while coupling with renewable hydrogen production and carbon capture technologies promises fully integrated zero-carbon energy ecosystems. Despite challenges in hydrogen storage, infrastructure rollout and precious metal costs, collaborative efforts across academia, industry and policy domains continue to accelerate technology maturation and commercialisation, positioning fuel cells as a cornerstone of the sustainable energy transition.

Research from Nature Portfolio

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Fuel Cell Technologies and Applications publication trend

The graph below shows the total number of articles in fuel cell technologies and applications across all publications each year (not limited to Nature Index journals).

Technical terms

Proton exchange membrane fuel cell (PEMFC): Electrochemical device using a polymer membrane to conduct protons from anode to cathode to generate electricity.

Solid oxide fuel cell (SOFC): High-temperature fuel cell with a ceramic electrolyte that conducts oxide ions, suitable for stationary and combined heat and power generation.

Electrocatalyst: Material that accelerates electrode reactions in a fuel cell, commonly platinum or alternative catalyst formulations.

Membrane electrode assembly (MEA): Core structure of a fuel cell comprising an electrolyte membrane sandwiched between catalyst layers and gas diffusion media.

References

1. Progress in hydrogen fuel cell membranes for sustainable energy generation. Journal of Energy Chemistry (2024).
2. Prospects of Fuel Cell Combined Heat and Power Systems. Energies (2020).
3. Comprehensive Analysis of Trends and Emerging Technologies in All Types of Fuel Cells Based on a Computational Method. Sustainability (2018).
4. A Recent Comprehensive Review of Fuel Cells: History, Types, and Applications. International Journal of Energy Research (2024).
5. Materials for electrocatalysts in proton exchange membrane fuel cell: A brief review. Frontiers in Energy Research (2023).