Mesostructural Intercalation Cathodes
Abstract
Mesoporous intercalation electrode materials were prepared, characterized, and their electrochemical performance evaluated. The usual characterization techniques were complemented by our (novel!) use of electron microprobe analysis to examine the homogeneity oft he products. The results show that in many cases, oxidation/reduction does not significantly alter the local structure about the electroactive metal ions in these relatively open structures, thus increasing the electrochemical reversibility. These structures also appear to facilitate ionic diffusion. Well-ordered mesoporous SnO and SnO2 were successfully prepared and exhibited higher specific capacities than the carbon materials presently used in the anodes of lithium ion batteries. These materials clearly have potential application as intercalation anode materials. The cycling behavior of manganese and vanadium substituted into a mesoporous host aluminophosphate framework showed very good reversibility, while rate capacity studies indicated excellent capacity retention. It is clear that the open mesoporous host structures facilitate the transport of lithium ions through the framework. The University provided funds to purchase an x-ray system in support of this work, with the provision that it be shared with other scientists on campus. Although no ARO funds were used for the purchase, the grant support from ARO played a major role in this acquisition.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 03, 2002
- Accession Number
- ADA414024
Entities
People
- Roger Frech
Organizations
- University of Oklahoma