Company Filing History:
2 out of 2 
1 out of 257 
1 out of 11 Years Active: 2017-2018
Title: Innovations by Inventor Long Li
Introduction
Long Li is a notable inventor based in Tianjin, China. He has made significant contributions to the field of materials science, particularly in the development of advanced membrane technologies. With a total of 4 patents to his name, his work has garnered attention for its innovative approaches and practical applications.
Latest Patents
One of Long Li's latest patents is a microporous membrane of polyethylene-based composite material. This invention includes high density and high crystallinity of polyethylene as a base material. The polyethylene is modified by a modifying agent accounting for 10-25 wt. % of the membrane, which includes a moderate molecular weight of rubber selected from polyisobutylene (PIB), ethylene-propylene methylene copolymer (EPM), or a mixture thereof. The rubber has a dynamic viscosity of between 50 and 2000 Pa·S at 100°C and a weight average molecular weight of between 90,000 and 250,000. The modified polyethylene is dissolved in a solvent along with a pore-forming agent for pore formation.
Another significant patent is for a coated separator with compressible elasticity, thermal shutdown, and high-temperature resistance. This lithium-ion battery separator consists of a PE micro-porous substrate and a micro-porous coating formed from a mixture of pre-crosslinked rubber particles and ceramic fine powder composite materials. The separator exhibits characteristics such as good compressible elasticity, thermal shutdown, low heat shrinkage, and high-temperature membrane rupture resistance.
Career Highlights
Long Li has worked with Tianjin Dg Membrane Co., Ltd., where he has contributed to the development of innovative membrane technologies. He has also been associated with Tianjin University, where he has likely engaged in research and development activities that further his expertise in materials science.
Collaborations
Throughout his career, Long Li has collaborated with notable individuals such as Xin Li and Jianhua Li. These collaborations have likely enriched his research and contributed to the advancements in his field.
Conclusion
Long Li's contributions to the field of materials science, particularly through his innovative patents, highlight his role as a significant inventor. His work continues to influence advancements in membrane technologies and battery applications.