Stephen W Sofie

Title: Innovations of Stephen W Sofie in Solid Oxide Fuel Cells

Introduction

Stephen W Sofie is a notable inventor based in Bozeman, MT (US). He has made significant contributions to the field of solid oxide fuel cells, holding 2 patents that showcase his innovative approaches to energy solutions. His work is primarily associated with the United States of America as represented by the Administrator of NASA.

Latest Patents

Sofie's latest patents include a "Method for making a fuel cell from a solid oxide monolithic framework." This invention presents a novel solid oxide fuel cell (SOFC) stack that comprises individual bi-electrode supported fuel cells. The design features a thin electrolyte supported between electrodes of essentially equal thickness. The individual cell units are crafted from graded pore ceramic tape, created through a freeze cast method followed by freeze drying. Each piece of graded pore tape transforms into a graded pore electrode scaffold, which is then made into either an anode or a cathode through appropriate solution and thermal treatment means. The assembly process involves depositing a thin coating of ion-conducting ceramic material on the surfaces of the tape, creating an unsintered electrode scaffold pair that sandwiches an electrolyte layer. The final assembly is sintered into a ceramic monolithic framework, with ceramic or glass edge seals installed to create flow channels for fuel and air.

Another significant patent is the "Symmetrical, bi-electrode supported solid oxide fuel cell." This invention features a symmetrical bi-electrode supported solid oxide fuel cell that comprises a sintered monolithic framework with graded pore electrode scaffolds. These scaffolds acquire anodic and cathodic catalytic activity through treatment with metal solutions and heat after sintering. The innovative freeze casting method for YSZ tape is crucial in achieving the graded pore structure of the electrode scaffolds.

Career Highlights

Stephen W Sofie's career is marked by his dedication to advancing fuel cell technology. His work has been instrumental in developing efficient energy solutions that have the potential to impact various industries.

Collaborations

Sofie has collaborated with Thomas L Cable, contributing to the innovative advancements in solid oxide fuel cell technology.

Conclusion

Stephen W Sofie's contributions to the field of solid oxide fuel cells demonstrate his commitment to innovation and energy efficiency. His patents reflect a deep understanding of materials and processes that can lead to more sustainable energy solutions.