Journal
NANO ENERGY
Volume 64, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2019.103935
Keywords
Conductive metal-organic framework; Self-sacrificed; Binder-free electrode; Aqueous Zn-Ion battery; Wearable electronics
Categories
Funding
- Fundamental Research Funds for the Central Universities [020514380183]
- National Natural Science Foundation of China [51703241]
- Key Research Program of Frontier Science of Chinese Academy of Sciences [QYZDB-SSW-SLH031]
- Science and Technology Project of Nanchang [2017-SJSYS-008]
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Metal-organic frameworks (MOFs) with adjustable structures and large surface areas are attracting ever-increasing attention in the field of next-generation energy storage. However, it still remains a great challenge to directly adopt MOFs as binder-free electrode materials resulting from their poor conductivity and form of bulk powders. Herein, we reported a novel self-sacrificed route to construct three dimensional conductive vanadium-based MOFs (V-MOFs, MIL-47) nanowire-bundle arrays on carbon nanotube fibers as advanced cathodes for aqueous Zn-ion batteries. Contributed by their abundant active sites, high conductivity, and hierarchical porosity, the assembled Zn-ion battery delivered a high volumetric capacity of 101.8 mAh cm(-3) at a current density of 0.1 A cm(-3) and an excellent rate capability (64.3% of initial capacity after a 50-fold increase in current density) in an aqueous electrolyte. More importantly, the assembled all-solid-state flexible fiber-shaped Zn-ion battery simultaneously exhibited both high energy density (17.4 mWh cm(-3)) and power density (1.46 W cm(-3)). Thus, this work demonstrates that the developed V-MOF is a promising candidate for cathode materials in Zn-ion batteries, paving the way for the construction of transition-metal-based conductive MOFs nanowires on current collectors for next-generation energy storage devices.
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