Hierarchical Nanostructured WO3 with Biomimetic Proton Channels and Mixed Ionic-Electronic Conductivity for Electrochemical Energy Storage.
Nano Lett
; 15(10): 6802-8, 2015 Oct 14.
Article
en En
| MEDLINE
| ID: mdl-26406938
ABSTRACT
Protein channels in biologic systems can effectively transport ions such as proton (H(+)), sodium (Na(+)), and calcium (Ca(+)) ions. However, none of such channels is able to conduct electrons. Inspired by the biologic proton channels, we report a novel hierarchical nanostructured hydrous hexagonal WO3 (h-WO3) which can conduct both protons and electrons. This mixed protonic-electronic conductor (MPEC) can be synthesized by a facile single-step hydrothermal reaction at low temperature, which results in a three-dimensional nanostructure self-assembled from h-WO3 nanorods. Such a unique h-WO3 contains biomimetic proton channels where single-file water chains embedded within the electron-conducting matrix, which is critical for fast electrokinetics. The mixed conductivities, high redox capacitance, and structural robustness afford the h-WO3 with unprecedented electrochemical performance, including high capacitance, fast charge/discharge capability, and very long cycling life (>50,000 cycles without capacitance decay), thus providing a new platform for a broad range of applications.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Óxidos
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Tungsteno
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Biomimética
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Nanoestructuras
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Conductividad Eléctrica
Idioma:
En
Revista:
Nano Lett
Año:
2015
Tipo del documento:
Article
País de afiliación:
Estados Unidos