Free-Standing Black Phosphorus Foils for Energy Storage and Catalysis |
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Authors: | Bing Wu Dr. Evgeniya Kovalska Dr. Jan Luxa Petr Marvan Štěpán Cintl Prof. Zdenek Sofer |
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Affiliation: | Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 16628 Prague 6, Czech Republic |
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Abstract: | Few-layered black phosphorus (BP) is a two-dimensional material that has attracted intensive attention for applications in energy storage and catalysis due to its large surface area and good electrical and thermal conductivity. Herein, a comparable study of BP electrochemical exfoliation in various solutions of tetrabutylammonium salts (TBAX; X is PF6−, BF4−, and ClO4−) in DMSO is reported. Based on morphological and structural analyses, it is shown that TBAPF6/DMSO medium was specifically appropriate for the production of high-quality BP nanosheets with micrometer lateral size and a thickness of about 2.4 nm. TBAPF6/DMSO-processed, few-layered BP exhibits enhanced hydrogen evolution reaction (HER) catalytic activity compared with that of samples exfoliated with the assistance of BF4− and ClO4− ions. Finally, the fabrication of flexible, free-standing BP films and their performance in an all-solid-state supercapacitor device are demonstrated. |
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Keywords: | black phosphorus electrochemistry energy storage all-solid-state supercapacitors free-standing films |
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