Kaoru Tsukamoto

Title: Kaoru Tsukamoto and Advances in Battery Electrode Technology.

Introduction

Kaoru Tsukamoto is an inventor associated with Omihachiman, Japan, and Matsushita Electric Industrial Co., Ltd. His patent work addresses graphite materials for negative electrodes in nonaqueous electrolyte secondary batteries. Tsukamoto is credited with 1 patent.

Latest Patents

Tsukamoto’s patent, “Nonaqueous Electrolyte Secondary Battery and Method for Manufacturing Negative Electrode of the Same,” focuses on improving the performance of graphite negative electrodes. Earlier graphite powders could not achieve a specific capacity close to the theoretical capacity of 372 mAh per gram. Attempts to improve high-rate charging and discharging also raised concerns about battery storage performance at high temperatures.

The invention describes pulverizing and shaping flaky graphite particles with specified crystal characteristics into disk- or tablet-like forms, then sifting them to obtain a powder with defined particle size, thickness, and X-ray diffraction properties. The patent presents this material as a way to balance high energy density with improved high-rate discharge performance and reliability during high-temperature storage.

Career Highlights

Tsukamoto’s documented patent contribution concerns the manufacture and use of graphite powder for battery negative electrodes. The work links material processing and particle characteristics to battery capacity, charge-discharge performance, and storage reliability.

Collaborations

The patent lists Masaki Kitagawa and Hisanori Sugimoto among Tsukamoto’s coworkers. The invention is associated with Matsushita Electric Industrial Co., Ltd.

Conclusion

Kaoru Tsukamoto’s patent addresses key trade-offs in secondary battery design by specifying a graphite electrode material intended to support high energy density, strong high-rate performance, and dependable high-temperature storage.