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Asymmetric Supercapacitors Based on Graphene/MnO2 and Activated Carbon Nanofiber Electrodes with High Power and Energy Density
Abstract
Asymmetric supercapacitor with high energy density has been developed successfully using graphene/MnO 2 composite as positive electrode and activated carbon nanofibers (ACN) as negative electrode in a neutral aqueous Na 2 SO 4 electrolyte. Due to the high capacitances and excellent rate performances of graphene/MnO 2 and ACN, as well as the synergistic effects of the two electrodes, such asymmetric cell exhibits superior electrochemical performances. An optimized asymmetric supercapacitor can be cycled reversibly in the voltage range of 0–1.8 V, and exhibits maximum energy density of 51.1 Wh kg−1, which is much higher than that of MnO 2//DWNT cell (29.1 Wh kg−1). Additionally, graphene/MnO 2//ACN asymmetric supercapacitor exhibits excellent cycling durability, with 97% specific capacitance retained even after 1000 cycles. These encouraging results show great potential in developing energy storage devices with high energy and power densities for practical applications.
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Cited by
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Wang, Q., Yan, J., & Fan, Z. (2016) · Energy & Environmental Science · doi:10.1039/c5ee03109e · Cited by 1,225
Self-citationWen, P., Gong, P., Sun, J., Wang, J., & Yang, S. (2015) · Journal of Materials Chemistry A · doi:10.1039/c5ta02461g · Cited by 586
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Jin, Y., Zou, L., Liu, L., Engelhard, M. H., Patel, R. L., Nie, Z., Han, K. S., Shao, Y., Wang, C., Zhu, J., et al. (2019) · Advanced Materials · doi:10.1002/adma.201900567 · Cited by 445
Metadata
- Authors
- Fan, Z., Yan, J., Wei, T., Zhi, L., Ning, G., Li, T., & Wei, F.
- Venue
- Advanced Functional Materials
- Publisher
- Wiley
- Published
- 2011-04-20
- Volume
- 21
- Issue
- 12
- Pages
- 2366-2375
- ISSN
- 1616-301X (ISSN-L)
- 1616-3028
- OpenAlex
- W2053526231
- Cited by
- 1,993
- References
- 0
- FWCI
- 45.30
- Type
- journal article
- Language
- en
- Open access
- closed
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- Fan, Z., Yan, J., Wei, T., Zhi, L., Ning, G., Li, T., & Wei, F. (2011). Asymmetric Supercapacitors Based on Graphene/MnO2 and Activated Carbon Nanofiber Electrodes with High Power and Energy Density. Advanced Functional Materials. https://doi.org/10.1002/adfm.201100058
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