Kouji Ishiwa

Title: Innovations by Kouji Ishiwa in Alkali Secondary Cell Technology

Introduction

Kouji Ishiwa, an accomplished inventor based in Yokohama, Japan, has made significant contributions to the field of battery technology. With a total of three patents to his name, he is particularly known for his innovations related to paste-type electrodes for alkali secondary cells. His work addresses critical issues in energy storage, especially concerning internal short-circuiting in batteries.

Latest Patents

One of Ishiwa's latest patents focuses on a paste-type electrode designed specifically for alkali secondary cells. This electrode innovation aims to suppress the occurrence of internal short-circuiting, a common issue when electrodes are rolled together with opposing polarities and a separator interposed. The unique design features a three-dimensional substrate made from a felt-like metal porous member, which includes a carefully arranged network of hollow metal fibers. Notably, the metal fibers near the surface have a larger diameter, ranging from 20 to 150 micrometers, while those in the inner portion measure between 10 to 100 micrometers. This structure allows for optimal performance due to the incorporation of a paste containing an activation substance, which enhances the electrode's functionality within alkali secondary cells.

Career Highlights

Kouji Ishiwa's career is closely associated with Toshiba Battery Co., Ltd., where he has been able to leverage his inventive skills in a corporate setting. His focus on battery technologies has contributed to advancements that improve the efficiency and safety of energy storage solutions.

Collaborations

Ishiwa's work has been enriched through collaborations with notable coworkers in the field, including Hirohito Teraoka and Katuyuki Hata. These partnerships have fostered a creative environment that encourages innovative problem-solving and the development of cutting-edge technologies.

Conclusion

In summary, Kouji Ishiwa is a pioneering inventor whose work in paste-type electrodes for alkali secondary cells represents a significant advancement in battery technology. His innovative approaches not only address critical safety concerns but also enhance overall performance, contributing to the ongoing evolution of energy storage solutions. With his continued efforts and collaborations, Ishiwa remains a key figure in the development of more efficient and reliable batteries.