Yutaka Bannai

Title: Yutaka Bannai: Innovator in Lithium Ion Battery Technology

Introduction

Yutaka Bannai is a notable inventor based in Sendai, Japan. He has made significant contributions to the field of battery technology, particularly in the development of lithium ion secondary batteries. His innovative approach has led to advancements that enhance the performance and efficiency of these essential energy storage devices.

Latest Patents

Yutaka Bannai holds a patent for a lithium ion secondary battery. This invention features a positive electrode, a negative electrode, and an electrolysis solution containing an aprotic solvent with an electrolyte dissolved in it. Notably, the negative electrode utilizes an amorphous carbon material as the active material. This material has an average particle diameter ranging from 7 µm to 20 µm, as measured by a laser diffraction scattering method. Additionally, the particle size distribution indicates that the ratio of particles less than 3 µm in diameter is between 1% by mass to 10% by mass, and it is free of any electrical conducting material.

Career Highlights

Yutaka Bannai is associated with NEC Energy Devices, Ltd., where he continues to work on innovative energy solutions. His expertise in battery technology has positioned him as a key figure in the industry, contributing to advancements that support the growing demand for efficient energy storage systems.

Collaborations

Yutaka Bannai has collaborated with notable colleagues, including Tatsuji Numata and Ryuichi Kasahara. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas in the field of energy technology.

Conclusion

Yutaka Bannai's contributions to lithium ion battery technology exemplify the importance of innovation in energy storage solutions. His work not only advances the field but also supports the transition to more sustainable energy practices.