Junqing Ma

Title: Innovations by Junqing Ma in Lithium-Ion Battery Technology

Introduction

Junqing Ma is a notable inventor based in Ann Arbor, MI (US), recognized for his contributions to the field of lithium-ion battery technology. He holds a total of 4 patents, showcasing his innovative approach to enhancing battery performance and efficiency.

Latest Patents

One of Junqing Ma's latest patents is focused on a silicon-based composite material. This composite material serves as an anode for lithium-ion batteries and comprises silicon, a transition metal, a ceramic, and an electrically conductive diluent such as carbon. The ceramic may include vanadium carbide or tungsten carbide, while the transition metal may consist of iron. The fabrication process involves grinding a starting mixture of these components, which can be achieved through a high-impact ball milling process. This grinding step may lead to partial alloying of the silicon with the metal and/or carbon. Additionally, the patent discloses a method for producing the material and electrodes that incorporate it.

Another significant patent by Junqing Ma involves an anode material made from nanoparticles. This anode material features a homogeneous mixture of lithium-alloying nanoparticles and active support matrix nanoparticles. The active support matrix nanoparticle is a compound that participates in the conversion reaction of the lithium battery, preferably a transition metal compound, which may include a nitride, carbide, oxide, or a combination thereof. The manufactured electrode from this anode material is designed to have a porosity ranging from 5% to 80%, with a more preferred range of 10% to 50%. The nanoparticles are characterized by a mean linear dimension between 2 and 500 nanometers, ideally between 2 and 50 nanometers.

Career Highlights

Throughout his career, Junqing Ma has worked with several prominent companies, including T/J Technologies, Inc. and Toyota Motor Engineering & Manufacturing North America, Inc. His experience in these organizations has contributed to his expertise in battery technology and materials science.

Collaborations

Junqing Ma has collaborated with notable colleagues such as Pu Zhang and Suresh Mani, further enhancing his research and development efforts in the field of lithium-ion batteries.

Conclusion

Junqing Ma's innovative work in lithium-ion battery technology, particularly through his patents, demonstrates his significant contributions to the advancement of energy storage solutions. His ongoing research continues to pave the way