Cathodes with high energy conversion efficiency aqueous zinc ion batteries

主講人 : Guozhong Cao

Aqueous zinc-ion batteries (ZIBs) promise a few advantages: natural abundance and massive production; non‐toxic, easy and mature processing, high volumetric energy density, high stability and compatibility in aqueous electrolytes, and the two-electron-redox properties offer a high theoretical anode capacity. In spite of great progress made in recent years, some critical challenges remain to be addressed, such as dissolution of cathodes, formation of basic zinc salts, co-intercalation of protons, and large voltage gap of redox pairs. In this presentation, I will take vanadium pentoxide and hydrate vanadium pentoxide as model systems to demonstrate that the pre-insertion of cations and organic complex can effectively reduce the charge-discharge polarization, resulting in much enhanced storage capacity, and high energy conversion efficiency with excellent cycling stability. Various possible mechanisms for the enhanced electrochemical properties and battery performance are discussed.

主講人簡介：

Dr. Guozhong Cao is Boeing-Steiner Endowed Professor of Materials Science and Engineering and Chemical Engineering at the University of Washington in Seattle, WA. Dr. Cao has published over 800 technical papers, authored and edited 8 books and 4 conference proceedings, and received 21 US patents. He is one of Clarivate Highly Cited Researchers with a total citation of > 63,000 and an h-index of 126. His book “Nanostructures and Nanomaterials: Synthesis, Properties and Applications” has been one of the bestsellers and used as textbook or reference book in many universities worldwide, and its second edition has been translated and published in Russian, Korean, and Chinese.