A 91吃瓜网 researcher is working to make portable devices and electric vehicles stay charged longer by extending the life of the rechargeable lithium-ion batteries powering them.
Assistant Professor Yang Yang is doing this by making the batteries more efficient, with some of his latest work focusing on keeping an internal metal structure, the anode, from falling apart over time by applying a thin, film-like coating of copper and tin. The new technique is detailed in a recent study in the journal Advanced Materials.
An anode generates electrons that travel to a similar structure, the cathode, inside the battery, thus creating a current and power.
鈥淥ur work has shown that the rate of degradation of the anode can be reduced by more than 1,000 percent by using a copper-tin film compared to a tin film that is often used,鈥� said Yang, who is with 91吃瓜网鈥檚 .
Yang is an expert in battery improvement including making them safer and able to withstand extreme temperatures.
The technique is unique because of its use of the copper-tin alloy and is an important improvement in stabilizing rechargeable battery performance, Yang says. It is also scalable for use in the smallest smartphone battery to larger batteries that power electric cars and trucks.
鈥淲e are motivated by our most recent research progress in alloyed materials for various applications,鈥� he says. 鈥淓ach alloy is unique in composition, structure and property.鈥�
The research was funded by the National Science Foundation through its Division of Chemical, Bioengineering, Environmental and Transport Systems鈥� Electrochemical Systems program and through 91吃瓜网鈥檚 startup funding and preeminent postdoctoral programs.
Study co-authors included Guanzhi Wang, a doctoral student in 91吃瓜网鈥檚 NanoScience Technology Center, , and the paper鈥檚 first author; Megan Aubin, a doctoral student in 91吃瓜网鈥檚 Department of Materials Science and Engineering; Abhishek Mehta, a graduate of 91吃瓜网鈥檚 Department of Materials Science and Engineering doctoral program; Huajun Tian and Jinfa Chang, postdoctoral scholars in 91吃瓜网鈥檚 NanoScience Technology Center; Akihiro Kushima, an assistant professor in 91吃瓜网鈥檚 Advanced Materials Processing and Analysis Center; and Yongho Sohn; a professor in 91吃瓜网鈥檚 Advanced Materials Processing and Analysis Center.
Yang holds joint appointments in 91吃瓜网鈥檚 NanoScience Technology Center and the Department of Materials Science and Engineering, which is part of the university鈥檚 . He is a member of 91吃瓜网鈥檚 Renewable Energy and Chemical Transformation (REACT) Cluster. Before joining 91吃瓜网 in 2015, he was a postdoctoral fellow at Rice University and an Alexander von Humboldt Fellow at the University of Erlangen-Nuremberg in Germany. He received his doctorate in materials science from Tsinghua University in China.
