Compact and Light Supercapacitor Electrodes from a Surface-Only Solid by Opened Carbon Nanotubes with 2 200 m2g−1Surface Area

Autor: Kenji Hata, Osamu Tanaike, Ali Izadi-Najafabadi, Tatsuki Hiraoka, Motoo Yumura, Don N. Futaba, Hiroaki Hatori, Satoshi Yasuda, Sumio Iijima, Takeo Yamada
Rok vydání: 2010
Předmět:
Zdroj: Advanced Functional Materials. 20:422-428
ISSN: 1616-3028
1616-301X
DOI: 10.1002/adfm.200901927
Popis: An approach is presented to make a "surface-only solid" with a surface area of 2 240 m 2 g -1 (1 310 m 2 cm -3 ), corresponding to 85% of the atoms constituting a surface, by opening single-walled carbon nanotube forests and solids via controlled oxidation. The controllability of the approach is demonstrated by tailoring the hole size to match the guest molecule, for example, nitrogen, fullerene, or solvated ions. These features make the surface-only solid an ideal vessel for material and energy storage, as demonstrated by its use for electrodes to realize a light and compact supercapacitor with high energy (24.7 W h kg -1 ) and power (98.9 kW kg -1 ) densities, exceeding those of activated carbon (16.9 W h kg -1 and 35.7 kW kg -1 ).
Databáze: OpenAIRE
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