In:
Angewandte Chemie, Wiley, Vol. 127, No. 23 ( 2015-06), p. 6904-6907
Kurzfassung:
We report a simple approach based on a chemical reduction method to synthesize aqueous inorganic ink comprised of hexagonal MnO 2 nanosheets. The MnO 2 ink exhibits long‐term stability and continuous thin films can be formed on various substrates without using any binder. To obtain a flexible electrode for capacitive energy storage, the MnO 2 ink was printed onto commercially available A4 paper pretreated with multiwalled carbon nanotubes. The electrode exhibited a maximum specific capacitance of 1035 F g −1 (91.7 mF cm −2 ). Paper‐based symmetric and asymmetric capacitors were assembled, which gave a maximum specific energy density of 25.3 Wh kg −1 and a power density of 81 kW kg −1 . The device could maintain a 98.9 % capacitance retention over 10 000 cycles at 4 A g −1 . The MnO 2 ink could be a versatile candidate for large‐scale production of flexible and printable electronic devices for energy storage and conversion.
Materialart:
Online-Ressource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v127.23
DOI:
10.1002/ange.201501261
Sprache:
Deutsch
Verlag:
Wiley
Publikationsdatum:
2015
ZDB Id:
505868-5
ZDB Id:
506609-8
ZDB Id:
514305-6
ZDB Id:
505872-7
ZDB Id:
1479266-7
ZDB Id:
505867-3
ZDB Id:
506259-7
Permalink