Atomic Layer Deposition (ALD) has emerged as a promising technique for fabricating thin films that enhance the performance of solid oxide fuel cells and solid oxide electrolysis cells. ALD allows for precise control over film thickness and composition at the atomic level, resulting in uniform and dense thin films. These characteristics enable the deposition of thin, homogeneous layers of various materials onto the porous electrode surfaces of solid oxide cells, thereby increasing electrochemical activity and reducing activation losses. Additionally, thin-film electrolytes produced through ALD can achieve high ionic conductivity and low ohmic losses, facilitating a reduction in the operating temperature of solid oxide cells. This review summarizes recent research trends in applying ALD technology to the fuel electrode, air electrode, and electrolyte of solid oxide cells and discusses design strategies aimed at improving efficiency and long-term stability.

Sustainable Aviation Fuel (SAF) is crucial for achieving carbon neutrality in the aviation sector. Among various production methods, Fischer–Tropsch (FT) synthesis using eco-friendly syngas has garnered significant attention. Two primary routes for producing syngas for FT synthesis—Dry Reforming of Methane (DRM) and Water Electrolysis combined with Reverse Water Gas Shift (WE&RWGS)—are actively being studied. As upstream processes, these routes are evaluated for their potential to provide low-carbon syngas for FT synthesis. However, comprehensive comparisons between these two pathways are limited, despite their importance for future technology planning and decision-making. In this study, we conduct a comparative evaluation of DRM- and WE&RWGS-based SAF production systems using virtual process design, along with life cycle assessment (LCA) and techno-economic analysis (TEA), to assess their environmental and economic viability as future technologies. LCA results indicate that the DRM-based route has more than four times lower environmental impact compared to the WE&RWGS-based system. The majority of the environmental burden arises from feedstock supply (CH₄ and CO₂) and energy inputs. TEA results suggest that while the base case scenario demonstrates limited economic feasibility, future scenarios that incorporate economies of scale and policy incentives show promise for long-term economic viability.

Hydrogen production using water electrolysis is generally a well-known phenomenon. Hydrogen produced using the water electrolysis method is an environment-friendly energy source called ‘green hydrogen’ that does not emit any environmental pollutants when using renewable energy as an energy source. This study aims to improve the efficiency of hydrogen production by using the ion transportation effect induced by a rotating magnetic force. For this purpose, the experimental conditions for ion transport were determined through an experiment using a copper wire and the rotating magnetic force for water electrolysis was applied using an alkali aqueous solution. Based on the results, an increase in the number of bubbles generated by the rotating magnetic force increased was observed. It is assumed that the efficiency of hydrogen production using water electrolysis can be improved by the rotating magnetic force.