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Tetrahydroxy-anthraquinone induced structural change of zeolitic imidazolate frameworks for asymmetric supercapacitor electrode material application.
- Source :
- New Journal of Chemistry; 3/21/2019, Vol. 43 Issue 11, p4425-4431, 7p
- Publication Year :
- 2019
-
Abstract
- A novel tetrahydroxy-anthraquinone zeolitic framework (TZM) with a Viburnum blossom-like structure is synthesized via a simple solvothermal method by using tetrahydroxy-anthraquinone to substitute imidazolate without carbonization at high temperature. Considering the excellent electrochemical performance of the TZM, including a high specific capacitance of 2030 F g<superscript>−1</superscript> at a current density of 1 A g<superscript>−1</superscript>, and good cycling stability with a capacitance retention of 94% of the initial capacitance after 1000 cycling charge/discharge measurements, an aqueous TZM//AC asymmetric supercapacitor (ASC) in 1 M KOH electrolyte is successfully fabricated by using the resultant TZM as the positive electrode and activated carbon nanosheets (ACS) as the negative electrode, respectively. The as-assembled aqueous ASC delivers a high energy density of 47.7 W h kg<superscript>−1</superscript> at a power density of 750 W kg<superscript>−1</superscript> with a high potential window of 0–1.5 V. Moreover, for the purpose of exploring the practical application of the active materials, an all-solid-state ASC TZM//ACS device with PVA-KOH gel electrolyte and separator is assembled and connected, which can light up a red light-emitting diode (LED). Its good performance demonstrates that the TZM//ACS ASC is a promising energy-storage system. [ABSTRACT FROM AUTHOR]
- Subjects :
- SUPERCAPACITORS
SUPERCAPACITOR electrodes
ENERGY density
Subjects
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 43
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 135233131
- Full Text :
- https://doi.org/10.1039/c9nj00036d