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Hierarchical NiCo2O4@NiCo2O4Core/Shell Nanoflake Arrays as High-Performance Supercapacitor Materials
Abstract
Hierarchical NiCo2O4@NiCo2O4 core/shell nanoflake arrays on nickel foam for high-performance supercapacitors are fabricated by a two-step solution-based method which involves in hydrothermal process and chemical bath deposition. Compared with the bare NiCo2O4 nanoflake arrays, the core/shell electrode displays better pseudocapacitive behaviors in 2 M KOH, which exhibits high areal specific capacitances of 1.55 F cm(-2) at 2 mA cm(-2) and 1.16 F cm(-2) at 40 mA cm(-2) before activation as well as excellent cycling stability. The specific capacitance can achieve a maximum of 2.20 F cm(-2) at a current density of 5 mA cm(-2), which can still retain 2.17 F cm(-2) (98.6% retention) after 4000 cycles. The enhanced pseudocapacitive performances are mainly attributed to its unique core/shell structure, which provides fast ion and electron transfer, a large number of active sites, and good strain accommodation.
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Cited by
Liang, H., Meng, F., Cabán-Acevedo, M., Li, L., Forticaux, A., Xiu, L., Wang, Z., & Jin, S. (2015) · Nano Letters · doi:10.1021/nl504872s · Cited by 987
Self-citationBai, X., Liu, Q., Liu, J., Zhang, H., Li, Z., Jing, X., Liu, P., Wang, J., & Li, R. (2017) · Chemical Engineering Journal · doi:10.1016/j.cej.2017.01.010 · Cited by 270
Metadata
- Authors
- Liu, X., Shi, S., Xiong, Q., Li, L., Zhang, Y., Tang, H., Gu, C., Wang, X., & Tu, J.
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-08-26
- Volume
- 5
- Issue
- 17
- Pages
- 8790-8795
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2316648308
- Cited by
- 533
- References
- 0
- FWCI
- 20.84
- Type
- journal article
- Language
- en
- Open access
- closed
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