Naoki Kumada

Title: Naoki Kumada: Innovator in Battery Technology

Introduction

Naoki Kumada is a prominent inventor based in Takehara, Japan. He has made significant contributions to the field of battery technology, holding a total of 3 patents. His work focuses on improving the performance and efficiency of battery materials.

Latest Patents

Kumada's latest patents include innovations such as a zinc foil, which serves as a primary battery negative electrode active material. This zinc foil is designed to reduce the amount of gas generated during the long-term storage of batteries, enhancing their reliability. The zinc foil contains zinc as the main material and bismuth, with a bismuth content ranging from 100 ppm to 10,000 ppm. Additionally, the zinc crystal grain size is maintained between 0.2 μm and 8 μm, while the bismuth crystal grain size is less than 1000 nm. His other notable patent involves a novel spinel type lithium transition metal oxide, which balances power performance characteristics and cycle performance at high temperatures.

Career Highlights

Naoki Kumada is currently employed at Mitsui Mining & Smelting Company, Ltd. His role at the company allows him to leverage his expertise in materials science to develop innovative solutions for energy storage.

Collaborations

Kumada has collaborated with notable coworkers such as Shinya Kagei and Keisuke Miyanohara, contributing to advancements in battery technology through teamwork and shared expertise.

Conclusion

Naoki Kumada's contributions to battery technology through his patents and collaborations highlight his role as an influential inventor in the field. His work continues to pave the way for advancements in energy storage solutions.