期刊
NANOSCALE
卷 12, 期 17, 页码 9524-9532出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nr00866d
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资金
- Dongguan University of Technology for the High-level Talents [GB200902-30, 196100041018, GB 200902-43, 196100041009]
- Foundation of Regular Research Team at the Dongguan University of Technology [TDYB2019007, 196100043028]
- Foundation of Young Research Team at the Dongguan University of Technology [TDQN2019004, 193500008008]
- Open Funds of the State Key Laboratory of Rare Earth Resource Utilization [RERU2019014]
- Natural Science Foundation of Guangdong Province [2017A030310645]
- National Natural Science Foundation of China [21805034]
Nanoscaled lanthanide metal-organic frameworks (NLn-MOFs) have emerged as attractive nanomaterials for photofunctional applications. To enhance the inherent properties and endow NLn-MOF materials with desired electrochemical performance for rechargeable Li-O-2 batteries, rational design and synthesis of NLn-MOFs with tailored morphologies for high O-2 accessibility and rich open metal sites to bind O-2 molecules is highly desired and remains a grand challenge. Herein, we prepare Dy-BTC nanospheres, which are explored for the first time as an O-2 cathode in Li-O-2 batteries. Interestingly, the specific capacity and electrochemical stability of the Dy-BTC nanosphere-based electrode outperform significantly those of the bulk crystalline Dy-BTC. A full discharge capacity of 7618 mA h g(-1) at 50 mA g(-1) has been achieved by the Dy-BTC nanospheres. Furthermore, the Dy-BTC nanospheres stably deliver a discharge capacity of 1000 mA h g(-1) at 200 mA g(-1) for 76 cycles, which is remarkably longer than that of the bulk crystalline Dy-BTC with a cycling life of 26 cycles.
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