Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 29, Issue 19, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201900532
Keywords
energy density; energy storage; Li-ion capacitors; manganese oxide; MOF-derived materials; nanoporous carbon
Categories
Funding
- Queensland University of Technology
- Australian Research Council (ARC) [FT180100058]
- Alexander von Humboldt (AvH) foundation
- Ministry of Education, Youth and Sports of the Czech Republic [LO1305, LM2015073]
- Operational Programme Research, Development and EducationEuropean Regional Development Fund of the Ministry of Education, Youth and Sports of the Czech Republic [CZ.02.1.01/0.0/0.0/15_003/0000416]
- Australian Research Council [FT180100058] Funding Source: Australian Research Council
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Hybrid metal-organic frameworks (MOFs) demonstrate great promise as ideal electrode materials for energy-related applications. Herein, a well-organized interleaved composite of graphene-like nanosheets embedded with MnO2 nanoparticles (MnO2@C-NS) using a manganese-based MOF and employed as a promising anode material for Li-ion hybrid capacitor (LIHC) is engineered. This unique hybrid architecture shows intriguing electrochemical properties including high reversible specific capacity 1054 mAh g(-1) (close to the theoretical capacity of MnO2, 1232 mAh g(-1)) at 0.1 A g(-1) with remarkable rate capability and cyclic stability (90% over 1000 cycles). Such a remarkable performance may be assigned to the hierarchical porous ultrathin carbon nanosheets and tightly attached MnO2 nanoparticles, which provide structural stability and low contact resistance during repetitive lithiation/delithiation processes. Moreover, a novel LIHC is assembled using a MnO2@C-NS anode and MOF derived ultrathin nanoporous carbon nanosheets (derived from other potassium-based MOFs) cathode materials. The LIHC full-cell delivers an ultrahigh specific energy of 166 Wh kg(-1) at 550 W kg(-1) and maintained to 49.2 Wh kg(-1) even at high specific power of 3.5 kW kg(-1) as well as long cycling stability (91% over 5000 cycles). This work opens new opportunities for designing advanced MOF derived electrodes for next-generation energy storage devices.
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