Hidekazu Doi

Title: Innovations by Hidekazu Doi

Introduction

Hidekazu Doi is a notable inventor based in Omiya, Japan. He has made significant contributions to the field of materials science, particularly in the development of hydrogen absorbing alloys and rechargeable batteries. With a total of 2 patents to his name, Doi's work is recognized for its potential applications in energy storage technologies.

Latest Patents

Doi's latest patents include a hydrogen absorbing Ni-based alloy and a rechargeable alkaline battery. The first patent describes a hydrogen absorbing Ni-based alloy that comprises 5 to 25% by weight of titanium (Ti), 10 to 37% by weight of zirconium (Zr), 4 to 20% by weight of manganese (Mn), 0.1 to 12% by weight of vanadium (V), 0.01 to 5% by weight of iron (Fe), 0.01 to 4.5% by weight of aluminum (Al), with the balance being nickel (Ni) and unavoidable impurities. This alloy is utilized in a sealed Ni-hydrogen rechargeable battery that features a negative electrode made from this hydrogen absorbing alloy, an Ni positive electrode, a separator, and an alkaline electrolyte solution.

The second patent focuses on a hydrogen absorbing Ni,Zr-based alloy, which consists of 5 to 20% by weight of titanium (Ti), 10 to 37% by weight of zirconium (Zr), 5 to 30% by weight of manganese (Mn), 0.01 to 15% by weight of tungsten (W), 6 to 30% by weight of iron (Fe), and optionally includes at least one of 0.1 to 7% by weight of copper (Cu), 0.05 to 6% by weight of chromium (Cr), and 0.01 to 5% by weight of aluminum (Al). This alloy is also used in a sealed Ni-hydrogen rechargeable battery, which shares similar components as the first patent.

Career Highlights

Hidekazu Doi is currently associated with Mitsubishi Metal Corporation, where he continues to innovate in the field of materials science. His work has contributed to advancements in energy storage solutions, which are crucial for sustainable energy systems.

Collaborations

Doi collaborates with Ritsue