Journal
NANO ENERGY
Volume 35, Issue -, Pages 138-145Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2017.02.044
Keywords
Flexible supercapacitors; Energy storage; Hybrid electrodes; All-solid-state
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Funding
- National Key Basic Research Program of China (973 Program) [2014CB648300]
- Program for New Century Excellent Talents in University [NCET-13-0645, NCET-13-0872]
- National Natural Science Foundation of China [21671170, 21422402, 21674050, 61136003, 61106036]
- Program for Innovative Research Team (in Science and Technology) in University of Henan Province [14IRTSTHN004]
- Natural Science Foundation of Jiangsu Province [BK20140060, BK20130037, BM2012010]
- Specialized Research Fund for the Doctoral Program of Higher Education [20133223110008]
- Ministry of Education of China [IRT1148]
- Program for Graduate Students Research and Innovation of Jiangsu Province [CXZZ12-0454]
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Six Talent Plan [2012XCL035, 2015XCL030]
- Qing Lan Project of Jiangsu Province
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A novel heterogenous Co3O4-nanocube/Co(OH)(2)-nanosheet hybrid is prepared by a controllable facile one-pot hydrothermal reaction. The resulting Co3O4 nanocubes are highly uniform in morphology, and are distributed uniformly on the individual Co(OH)(2) nanosheets. Such unique nanostructural features show significant advantages for applications as flexible supercapacitor electrodes in terms of enhanced durability and capacitance. The as-prepared electrode has offered a large capacitance of 1164 F g(-1) at 1.2 A g(-1). When being paired with activated carbon, the resulting flexible all-solid-state device exhibited a maximum energy density of 9.4 mWh cm(-3). It is worthwhile noting that this as-assembled device showed little capacitance decay after over 5000 cycles with 97.4% retention of its original specific capacitance. Such a high performance outperforms most metal oxides-based electrodes and shows the advantages of the hybrid strategy, which shed light on exploring robust and cheap electrode materials for high-performance flexible supercapacitors.
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