Masahiro Shiraga

Title: Masahiro Shiraga: Innovator in Nonaqueous Electrolyte Secondary Batteries

Introduction

Masahiro Shiraga is a prominent inventor based in Hyogo, Japan. He has made significant contributions to the field of battery technology, particularly in the development of nonaqueous electrolyte secondary batteries. With a total of 2 patents to his name, Shiraga's work focuses on improving the efficiency and performance of these batteries.

Latest Patents

Shiraga's latest patents include innovations in negative electrodes for nonaqueous electrolyte secondary batteries. One of his key inventions aims to enhance the initial charge-discharge efficiency of these batteries by utilizing a combination of carbon materials and metals or metal oxides that form alloys with lithium. His patented designs incorporate a polymer material that does not react with lithium, which is coated on the surface of the carbon material. This innovative approach ensures that the mass percentage of the polymer material relative to the carbon material is maintained between 0.5 to 2 mass percent.

Another significant patent focuses on the overall structure of the nonaqueous electrolyte secondary battery. This design includes a positive electrode, a negative electrode, a porous layer, a separator, and a nonaqueous electrolyte. The porous layer features flat voids, with specific dimensions that optimize the battery's performance. The ratio of the major axis to the minor axis of these flat voids is ideally maintained between 1.4 and 2.2, contributing to improved initial charge/discharge efficiency and cycle characteristics.

Career Highlights

Masahiro Shiraga is currently associated with Sanyo Electric Co., Ltd., where he continues to innovate in the field of battery technology. His work has been instrumental in advancing the capabilities of nonaqueous electrolyte secondary batteries, making them more efficient and reliable for various applications.

Collaborations

Shiraga has collaborated with notable colleagues, including Kei Kobayashi and Tatsuki Hiraoka. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas in the field of battery technology.

Conclusion

Masahiro Shiraga's contributions to the development of nonaqueous electrolyte secondary batteries highlight his role as a key innovator in the industry. His patents reflect a commitment to enhancing battery performance and efficiency, paving the way for future advancements in energy storage technology.