Metal–Organic Framework (MOF) Derived Electrodes with Robust and Fast Lithium Storage for Li‐Ion Hybrid Capacitors |
| |
Authors: | Deepak P Dubal Kolleboyina Jayaramulu Janaky Sunil tpn Kment Pedro Gomez‐Romero Chandrabhas Narayana Radek Zboil Roland A Fischer |
| |
Affiliation: | Deepak P. Dubal,Kolleboyina Jayaramulu,Janaky Sunil,Štěpán Kment,Pedro Gomez‐Romero,Chandrabhas Narayana,Radek Zbořil,Roland A. Fischer |
| |
Abstract: | 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. |
| |
Keywords: | energy density energy storage Li‐ion capacitors manganese oxide MOF‐derived materials nanoporous carbon |
|
|