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Tungsten Oxide@Polypyrrole Core-Shell Nanowire Arrays as Novel Negative Electrodes for Asymmetric Supercapacitors
Abstract
Among active pseudocapacitive materials, polypyrrole (PPy) is a promising electrode material in electrochemical capacitors. PPy-based materials research has thus far focused on its electrochemical performance as a positive electrode rather than as a negative electrode for asymmetric supercapacitors (ASCs). Here high-performance electrochemical supercapacitors are designed with tungsten oxide@PPy (WO3 @PPy) core-shell nanowire arrays and Co(OH)2 nanowires grown on carbon fibers. The WO3 @PPy core-shell nanowire electrode exhibits a high capacitance (253 mF/cm2) in negative potentials (-1.0-0.0 V). The ASCs packaged with CF-Co(OH)2 as a positive electrode and CF-WO3 @PPy as a negative electrode display a high volumetric capacitance up to 2.865 F/cm3 based on volume of the device, an energy density of 1.02 mWh/cm3 , and very good stability performance. These findings promote the application of PPy-based nanostructures as advanced negative electrodes for ASCs.
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Cites
Nanostructured Tungsten Oxide – Properties, Synthesis, and Applications
Zheng, H., Ou, J. Z., Strano, M. S., Kaner, R. B., Mitchell, A., & Kalantar‐zadeh, K. (2011) · Advanced Functional Materials · doi:10.1002/adfm.201002477 · Cited by 1,479
Cited by
Tungsten Oxides for Photocatalysis, Electrochemistry, and Phototherapy
Huang, Z., Song, J., Pan, L., Zhang, X., Wang, L., & Zou, J. (2015) · Advanced Materials · doi:10.1002/adma.201501217 · Cited by 608
Materials Design and System Construction for Conventional and New‐Concept Supercapacitors
Wu, Z., Li, L., Yan, J., & Zhang, X. (2017) · Advanced Science · doi:10.1002/advs.201600382 · Cited by 470
Sun, J., Wu, C., Sun, X., Hu, H., Zhi, C., Hou, L., & Yuan, C. (2017) · Journal of Materials Chemistry A · doi:10.1039/c7ta00932a · Cited by 361
Metadata
- Authors
- Wang, F., Zhan, X., Cheng, Z., Wang, Z., Wang, Q., Xu, K., Safdar, M., & He, J.
- Venue
- Small
- Publisher
- Wiley
- Published
- 2014-10-01
- Volume
- 11
- Issue
- 6
- Pages
- 749-755
- ISSN
- 1613-6810 (ISSN-L)
- OpenAlex
- W2020537706
- Cited by
- 178
- References
- 1
- FWCI
- 5.84
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wang, F., Zhan, X., Cheng, Z., Wang, Z., Wang, Q., Xu, K., Safdar, M., & He, J. (2015). Tungsten Oxide@Polypyrrole Core-Shell Nanowire Arrays as Novel Negative Electrodes for Asymmetric Supercapacitors. Small. https://doi.org/10.1002/smll.201402340
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