Title:
Intercalation of Lithium into Modified Carbon Aerogels
Project management at the University of Würzburg:
Participating scientists:
Abstract:
Porous carbon electrodes are used in many electrochemical systems for charge storage, e.g. lithium batteries and supercapacitors. In contrast to supercapacitors, where charge is stored on the surface, for Lithium-ion batteries a high charge capacity of the bulk carbon is required. Upon charging these batteries, Lithium ions are intercalated in between graphene layers of microcrystallites.
The objective of this project is the optimization of carbon aerogels for the intercalation of Lithium. Carbon Aerrogels exhibit large amounts of small pores with diameters below 2 nm, which can be utilized for the storage of Lithium ions. The reversible charge/discharge of Lithium in these "micro-cavities" is investigated in varying the extension and accessibiliy for electrolyte of the cavities in carbon aerogels. The capacity of aerogel electrodes determined via various electrochemical methods can be compared with structural data of the electrodes derived from X-ray scattering and sorption analysis. Useful information on the underlying charging mechanisms and further parameter optimizations can be drawn from these evaluations.
Key words:
Carbon Aerogel
Intercalation
Lithium
Battery
Projekt period: from 05.2000 to 04.2002
Funding institution:
VW-Stiftung ( Az.: I/76 357 ) ,Granting date: 20.05.2000