Nobuaki Ishii

Title: Innovations by Nobuaki Ishii: Advancements in Lithium-Ion Battery Technology

Introduction

Nobuaki Ishii is a prominent inventor based in Tokyo, Japan, recognized for his contributions to the field of lithium-ion battery technology. With an impressive portfolio of 23 patents, Ishii continues to drive innovation, developing materials and methods that enhance the efficiency and performance of secondary batteries.

Latest Patents

Among his latest patents, Ishii has developed a negative electrode material for lithium-ion secondary batteries, alongside a method for manufacturing it. This innovative material comprises composite particles containing nanosilicon particles, graphite particles, and an amorphous carbon component. The nanosilicon particles, with a diameter ranging from 5 to 100 nm, make up 30 to 60 mass % of the composite, while the amorphous carbon contributes equivalently to the structure. Furthermore, the composite material has notable properties such as a 90% particle diameter in the range of 10.0 to 40.0 µm and a BET specific surface area of 1.0 to 5.0 m²/g. These characteristics significantly impact the thermal and electrochemical performance of the resulting batteries.

Additionally, Ishii’s patents involve a paste for negative electrodes, the construction of negative electrode sheets, and a comprehensive method for manufacturing the negative electrode material. The innovative powders and electrodes derived from this research enable enhanced performance in lithium-ion secondary batteries through the use of silicon-based domains effectively dispersed within a matrix material.

Career Highlights

Throughout his career, Nobuaki Ishii has made significant strides in the energy storage sector. His work has been associated with leading companies, including Showa Denko K.K. and Umicore, where he honed his expertise in materials science and battery technology. These experiences have positioned him at the forefront of research and development in innovative battery solutions.

Collaborations

Collaborating with esteemed individuals like Masataka Takeuchi and Michihiro Takama, Ishii has contributed to various projects that seek to enhance battery systems. These partnerships have facilitated knowledge sharing and pushed the boundaries of what can be achieved in the field of energy storage technology.

Conclusion

Nobuaki Ishii's innovative work in developing advanced materials and methods for lithium-ion batteries marks a transformative contribution to the industry. His extensive patent portfolio and collaborative efforts exemplify a commitment to pushing technological boundaries and improving energy solutions for future applications. With his continued dedication, Ishii promises to remain a leading figure in the world of battery innovation.