Three-dimensional carbon foam supported tin oxide nanocrystallites with tunable size range: sulfonate anchoring synthesis and high rate lithium storage properties
2015 (English)In: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 294, 208-15 p.Article in journal (Refereed) PublishedText
The development of a free-standing electrode with high rate capability requires the realization of facile electrolyte percolation, fast charge transfer at the electrode-electrolyte interface as well as the intimate electrical wiring to the current collector. Employing a sulfonated high internal phase emulsion polymer (polyHIPE) as the carbon precursor, we developed a free-standing composite of carbon foam encapsulated SnO 2 nanocrystallites, which simultaneously satisfies the aforementioned requirements. When directly evaluated in the pouch cell without using the binder, carbon additive or metallic current collector, the best performing composite exhibits a good rate performance up to 8 A g -1 and very stable cyclability for 250 cycles. This cycling performance was attributed to the synergistic coupling of hierarchical macro/mesoporous carbon foam and SnO 2 nanocrystals with optimized size range. Postmortem characterizations unveiled the significant influence of subtle size variation of oxides on the electrochemical performance. [All rights reserved Elsevier].
Place, publisher, year, edition, pages
2015. Vol. 294, 208-15 p.
IdentifiersURN: urn:nbn:se:uu:diva-271361OAI: oai:DiVA.org:uu-271361DiVA: diva2:891789