Carbon materials are used in almost every battery chemistries. They can be used as conductive agents, hosting material for Li insertion or porous electrodes for e.g. fuel cells and supercapacitors. Surface area, pore size and size distribution play important roles in the porous electrodes suitable for battery, fuel cell and supercapacitor applications. The most significant impact for the porosity of a porous electrode is on the kinetics for ionic diffusion within the matrix. Porosity is one of the most important engineering factors for the design or the porous electrodes.
Two case studies will be discussed to demonstrate the application of electrochemical principals in battery designs using carbon materials.
- Battery with air cathode – the high energy solution: In the light of previous session, the concept of air-diffusion-electrode will be introduced together with the selection of catalysts.
- Supercapacitor – the high power solution: The concepts of supercapacitor will be discussed with focus on the material science and cell engineering. Double-layer, metal oxide, H and Li asymmetric supercapacitors will be introduced.
Prof. Deyang Qu is the Chair of Mechanical Engineering Department and Johnson Controls Endowed Chair Professor in Energy Storage Research, a collaborative appointment between the College of Engineering and Applied Science of University of Wisconsin Milwaukee, Johnson Controls, and Wisconsin Energy Institute of University of Wisconsin Madison. He graduated with a B.Sc. in Electrochemistry with honors at the Department of Chemistry, Wuhan University, China in 1986. He continued his graduate studies at University of Ottawa in Canada with Professor B.E. Conway and earned his Ph.D. in electrochemistry in 1994. Right after graduation, Prof. Qu started his career in the battery industry. Before joining the faculty of UMass Boston in the spring of 2005, he had spent twelve years in Rayovac. Prof. Qu has developed research programs in the areas of lead acid batteries, alkaline batteries, metal air batteries, Lithium Sulfur batteries, Solid state Li batteries, fuel cells, supercapactors and hydrogen storage.