Fumio Yamakawa

Title: Fumio Yamakawa: Innovator in Solid Electrolyte Production

Introduction

Fumio Yamakawa is a notable inventor based in Ichihara, Japan. He has made significant contributions to the field of solid electrolytes, holding a total of 3 patents. His work focuses on methods for producing sulfide solid electrolytes, which are crucial for advancements in battery technology.

Latest Patents

Yamakawa's latest patents include a method for producing sulfide solid electrolytes. The problem addressed by this invention is the need for an efficient production method that does not rely on pulverizers. The solution involves stirring a mixture of lithium sulfide, a phosphorus compound, a halogen compound, and a complexing agent in a reactor. This method allows for the circulation of the contents within the reactor, enhancing the production process.

Another significant patent is a novel method for producing a solid electrolyte with high ionic conductivity. This method involves mixing a raw material inclusion containing lithium, sulfur, phosphorus, and halogen atoms with a complexing agent and a solvent. The precise amount of the complexing agent is critical, ranging from 0.1 mL to 4.0 mL per gram of the raw material inclusion.

Career Highlights

Throughout his career, Yamakawa has worked with prominent companies such as Idemitsu Kosan Company, Limited and Toyota Motor Corporation. His experience in these organizations has contributed to his expertise in the field of solid electrolytes and battery technology.

Collaborations

Yamakawa has collaborated with notable colleagues, including Shinji Tanaka and Masao Aida. These partnerships have likely fostered innovation and development in his research endeavors.

Conclusion

Fumio Yamakawa's contributions to the field of solid electrolytes are significant, with multiple patents that address critical challenges in production methods. His work continues to influence advancements in battery technology and solid-state materials.