Emulsion-templated bicontinuous carbon network electrodes for use in 3D microstructured batteries
2013 (English)In: Journal of Materials Chemistry, ISSN 0959-9428, E-ISSN 1364-5501, Vol. 1, no 44, 13750-13758 p.Article in journal (Refereed) Published
High surface area carbon foams were prepared and characterized for use in 3D structured batteries. Twopotential applications exist for these foams: ﬁrstly as an anode and secondly as a current collector supportfor electrode materials. The preparation of the carbon foams by pyrolysis of a high internal phase emulsionpolymer (polyHIPE) resulted in structures with cage sizes of 25 mm and a surface area enhancement pergeometric area of approximately 90 times, close to the optimal conﬁguration for a 3D microstructuredbattery support. The structure was probed using XPS, SEM, BET, XRD and Raman techniques; revealingthat the foams were composed of a disordered carbon with a pore size in the <100 nm range resultingin a BET measured surface area of 433 m2 g-1. A reversible capacity exceeding 3.5 mA h cm2 at acurrent density of 0.37 mA cm-2 was achieved. SEM images of the foams after 50 cycles showed thatthe structure suﬀered no degradation. Furthermore, the foams were tested as a current collector bydepositing a layer of polyaniline cathode over their surface. High footprint area capacities of500 mA h cm-2 were seen in the voltage range 3.8 to 2.5 V vs. Li and a reasonable rate performancewas observed.
Place, publisher, year, edition, pages
United Kingdom, 2013. Vol. 1, no 44, 13750-13758 p.
Carbon foam, High internal phase emulsion polymer, microbattery, 3D microbattery, Lithium ion
Chemical Sciences Materials Chemistry
Research subject Materials Science; Chemistry; Materials Science; Physical Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-210659DOI: 10.1039/C3TA12680CISI: 000326463400009OAI: oai:DiVA.org:uu-210659DiVA: diva2:663788
FunderSwedish Energy AgencySwedish Research Council