Highly N/O co-doped ultramicroporous carbons derived from nonporous metal-organic framework for high performance supercapacitors

A new nonporous Zn-based metal-organic framework readily synthesized from a high nitrogen-containing ligand can be converted into ultramicroporous carbons with narrow pore size distribution and 20.18% N/O co-doping by direct carbonization. The NPMOF-800 fabricated electrode exhibits very high capaci...

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Bibliographic Details
Published in:Chinese chemical letters 2021-04, Vol.32 (4), p.1491-1496
Main Authors: Gu, Yangyi, Miao, Ling, Yin, Ying, Liu, Mingxian, Gan, Lihua, Li, Liangchun
Format: Article
Language:English
Subjects:
Metal-organic frameworks
N/O co-doped
Porous carbons
Supercapacitors
Ultramicroporous
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Summary:A new nonporous Zn-based metal-organic framework readily synthesized from a high nitrogen-containing ligand can be converted into ultramicroporous carbons with narrow pore size distribution and 20.18% N/O co-doping by direct carbonization. The NPMOF-800 fabricated electrode exhibits very high capacitance of 220 F/g and shows excellent energy, power density, and 99.1% capacitance retention rate after 10,000 charge-discharge cycles. [Display omitted] A new nonporous Zn-based metal-organic framework (NPMOF) synthesized from a high nitrogen-containing rigid ligand was converted into porous carbon materials by direct carbonization without adding additional carbon sources. A series of NPMOF-derived porous carbons with very high N/O contents (24.1% for NPMOF-700, 20.2% for NPMOF-800, 15.1% for NPMOF-900) were prepared by adjusting the pyrolysis temperatures. The NPMOF-800 fabricated electrode exhibits a high capacitance of 220 F/g and extremely large surface area normalized capacitance of 57.7 μF/cm2 compared to other reported MOF-derived porous carbon electrodes, which could be attributed to the abundant ultramicroporosity and high N/O co-doping. More importantly, symmetric supercapacitor assembled with the MOF-derived carbon manifests prominent stability, i.e., 99.1% capacitance retention after 10,000 cycles at 1.0 A/g. This simple preparation of MOF-derived porous carbon materials not only finds an application direction for a variety of porous or even nonporous MOFs, but also opens a way for the production of porous carbon materials for superior energy storage.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2020.09.029