The global PEM Fuel Cell Gas Diffusion Layer market in the Energy and Power sector is expected to grow significantly, projected to reach USD 6.5 billion by 2031 with a compound annual growth rate (CAGR) of 15.5% from 2025 to 2031. This growth is attributed to the increasing investments in clean energy technologies and the rising adoption of fuel cells in transportation and stationary power systems. Gas diffusion layers play a critical role in ensuring efficient reactant distribution and water management within the cell, influencing overall performance. The market is estimated to hit USD 2.1 billion in 2024, showcasing strong growth potential throughout the forecast period. By 2031, key industries such as automotive, aerospace, and portable power are expected to drive robust demand for PEM fuel cell gas diffusion layers, especially in the automotive sector due to advancements in hydrogen-powered vehicles. Asia-Pacific is anticipated to lead the market, benefiting from strong industrial infrastructure and government initiatives towards hydrogen economies. The market is witnessing strategic collaborations, technology licensing, and supply chain integration to meet growing demand and regulatory standards globally. The factors supporting the future growth of the PEM Fuel Cell Gas Diffusion Layer market include technological advancements driving product innovation and reducing costs, expanding applications across various industries, favorable government policies and infrastructure support, and increased investments in research and development. These factors are creating a conducive environment for market expansion and driving towards long-term growth. The report covers key segments of the market including material types like carbon paper and cloth, applications such as automotive and stationary power, and end-user industries like transportation and industrial sectors. It also provides insights into regional analysis, highlighting market growth and dynamics in different regions, emphasizing the global spread and potential of PEM fuel cell gas diffusion layers in the energy and power sector.