Su-Min Lee

Title: Su-Min Lee: Innovator in Polyester Resins and Lithium Batteries

Introduction

Su-Min Lee is a prominent inventor based in Gyeonggi-do, South Korea. He holds a total of 11 patents, showcasing his significant contributions to the fields of materials science and energy storage. His innovative work primarily focuses on polyester resins and rechargeable lithium batteries, which have applications in various industries.

Latest Patents

One of Su-Min Lee's latest patents involves a polyester resin that is particularly useful for bottles, sheets, multilayer sheets, stretched films, and fiber applications. This polyester resin exhibits excellent heat resistance and transparency, with minimal deterioration of physical properties such as yellowing during processing. The process for creating this polyester resin includes an esterification reaction between terephthalic acid and isosorbide, followed by a polycondensation reaction. The initial mixing ratio of the dicarboxylic acid and the diol is carefully controlled to be between 1:1.02 and 1:1.04.

Another significant patent is for a rechargeable lithium battery. This battery features a positive electrode with a positive active material, a negative electrode with a negative active material, and an electrolyte solution that includes a lithium salt and a non-aqueous organic solvent. The separator between the electrodes is designed with a porous substrate and a coating layer. The negative active material incorporates a silicon-based material, while the non-aqueous organic solvent contains cyclic carbonates such as ethylene carbonate and propylene carbonate. This innovative design enhances the battery's cycle-life and high-temperature storage characteristics.

Career Highlights

Su-Min Lee has worked with notable companies such as Mando Corporation and Samsung SDI Co., Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to advancements in technology and materials.

Collaborations

Throughout his career, Su-Min Lee has collaborated with esteemed colleagues, including Kwang-Jo Cheong and Yong-Beom Lee. These partnerships have fostered a creative environment that encourages the exchange of ideas and expertise.

Conclusion

Su-Min Lee's contributions to the fields of polyester resins and rechargeable lithium batteries highlight his role as a leading inventor. His innovative patents and collaborations with industry professionals continue to impact technology and materials science positively.