Won Young Cho

Title: Innovations by Won Young Cho in Microporous Polyethylene Film Technology

Introduction

Won Young Cho is a notable inventor based in Daejeon, South Korea. He has made significant contributions to the field of materials science, particularly in the development of microporous polyethylene films for battery applications. With a total of 4 patents to his name, his work has the potential to enhance battery performance and stability.

Latest Patents

Among his latest patents, Cho has developed a method for producing microporous high-density polyethylene film. This film is designed specifically for use as a battery separator. It features high-density polyethylene with a weight average molecular weight of 2×10^5×10, containing 5 wt % or less of molecules with a molecular weight of 1×10 or less. The film exhibits impressive tensile strengths of 1,100 kg/cm or more in both transverse and machine directions, a puncture strength of 0.22 N/μm or more, and a gas permeability of 1.3×10 Darcy or more. Additionally, it maintains shrinkages of 5% or less in both machine and transverse directions. This innovation not only improves the performance and stability of batteries but also enhances productivity due to its excellent extrusion-compoundability and stretchability.

Another significant patent by Cho involves a microporous polyethylene film that also serves as a battery separator. This film comprises a resin mixture that includes 100 parts by weight of a composition containing 20-50 wt % polyethylene with a weight average molecular weight of 5×10^3×10 and 80-50 wt % diluent. It also includes components such as peroxide and anti-oxidant in specific proportions. This invention aims to increase the production efficiency of the microporous film while improving the performance and stability of batteries utilizing this film.

Career Highlights

Throughout his career, Won Young Cho has worked with prominent companies such as SK Energy Co., Ltd. and Yukong Limited. His experience in these organizations has contributed to his expertise in materials science and innovation.

Collaborations

Cho has collaborated with notable colleagues, including Byoung Cheon Jo and Young Keun Lee. Their combined efforts have likely fostered advancements in the field of battery technology.

Conclusion

Won Young Cho's contributions to the development of microporous polyethylene films represent a significant advancement in battery