Katsuyuki Negishi

Title: Katsuyuki Negishi: Innovator in Lithium-Ion Battery Technology

Introduction

Katsuyuki Negishi is a prominent inventor based in Tokyo, Japan. He is best known for his contributions to the field of lithium-ion rechargeable batteries. His innovative work has significantly impacted the development of high-capacity batteries that maintain high discharge voltage and can endure repeated charging and discharging at high currents.

Latest Patents

Negishi holds a patent for a lithium-ion secondary battery that features an electrode group formed by laminating or winding a negative electrode layer and a positive electrode layer. This design interposes a separator made of synthetic resin, with the negative electrode layer containing a material capable of intercalating and deintercalating lithium ions. The positive electrode layer includes a lithium-containing metallic oxide, and the entire electrode group is immersed in a non-aqueous electrolyte containing lithium salt. Notably, the positive electrode material unit utilizes a fluorinated lithium-containing metallic oxide as a main material, while the separator possesses a hydrophilic group. The positive electrode material also preferably contains a main material including LiNiCoMnO, adhering to specific compositional ratios.

Career Highlights

Throughout his career, Katsuyuki Negishi has worked with notable companies such as Toyo Tanso Co., Ltd. and Nippon Chemical Industrial Co., Ltd. His experience in these organizations has allowed him to refine his expertise in battery technology and contribute to advancements in the field.

Collaborations

Negishi has collaborated with esteemed colleagues, including Hitoshi Takebayashi and Makoto Hongu. Their joint efforts have further propelled innovations in battery technology and enhanced the performance of lithium-ion batteries.

Conclusion

Katsuyuki Negishi's work in lithium-ion battery technology exemplifies the spirit of innovation. His patented designs and collaborations have made significant contributions to the advancement of energy storage solutions. His legacy continues to influence the future of battery technology.