Composite Films of Metal Oxide and Carbon Nanostructures for Energy Storage
Technical Report,01 Jul 2011,30 Sep 2016
Duke University Durham United States
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Rechargeable batteries and supercapacitors are two major systems for electrochemical energy storage. Some battery technologies are mature, while supercapacitors and other advanced battery technologies are currently at earlier stages of development, simply due to far lower energy densities compared to current established systems. In spite of their different abilities in energy and power performances, especially, rechargeable batteries and pseudo capacitors have similarities in configuration and charge storage mechanisms, which involve reversible redox reactions in transition metal based-electrode materials. Thus, their charge storage capacity as well as rate capability largely depend onion and electron transport kinetics within electrode materials. These transport kinetics, however, are often limited since the most of the transition metal-based materials have intrinsically poor electrical conductivity. In this work, to understand the influence on the electrode conductivity and electrochemical performances in these systems, a systematic study was conducted using three main approaches namely nanostructuring, chemical substitutions, and introduction of carbon additives.
- Electrochemical Energy Storage