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Intrapore-Texturized Vanadia-Hydrate Supercapacitor with Ultrahigh Area-Normalized Capacitance

Chen, Y.-C.; Treptow, J.; Hsu, Y.-K.; Feldmann, C.

Abstract (englisch):
A pressing need for ultrahigh area‐normalized capacitance emerges from the migration to miniaturized composite supercapacitors. Herein, an advanced electric field‐assisted sol–gel synthesis protocol that allows to obtain ribbon‐like vanadium oxides that preferentially creep along the porous tunnels in a commercially available carbon host of low density is demonstrated. In particular, this design offers 1) to convert the original submicrometer‐sized pore network into hierarchically macroporous yet 3D‐interconnected bicontinuous composite frameworks and 2) to considerably add pseudo‐capacitive functionalities onto a highly conductive carbon cloth backbone. Both are demonstrated by an unprecedented area‐normalized capacitance exceeding 5 F cm−2. Moreover, the as‐designed symmetric supercapacitor is characterized by a maximum area‐normalized cell capacitance in the order of 1 F cm−2, a geometric energy density of 0.34 mW h cm−2, and a geometric power density of 28.3 mW cm−2. These features outperform commercial double‐layer supercapacitors as well as many state‐of‐the‐art composite pseudo‐capacitors and lithium‐ion microbatteries.

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Verlagsausgabe §
DOI: 10.5445/IR/1000099783
Veröffentlicht am 17.02.2020
DOI: 10.1002/pssa.201900558
Zitationen: 1
Web of Science
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Anorganische Chemie (AOC)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 0031-8965, 1521-396X, 1862-6300, 1862-6319
KITopen-ID: 1000099783
Erschienen in Physica status solidi / A
Verlag John Wiley and Sons
Band 216
Heft 22
Seiten Article No.1900558
Vorab online veröffentlicht am 04.09.2019
Nachgewiesen in Dimensions
Web of Science
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