Free‐Standing Black Phosphorus Foils for Energy Storage and Catalysis. Issue 36 (8th June 2020)

• Record Type: Journal Article
• Authors: Wu, Bing; Kovalska, Evgeniya; Luxa, Jan; Marvan, Petr; Cintl, Štěpán; Sofer, Zdenek
• Is Part Of: Chemistry. Volume 26:Issue 36(2020)
• Page Start: 8162
• Page End: 8169
• Publication Date: 2020-06-08
• Subjects: black phosphorus -- electrochemistry -- energy storage -- all-solid-state supercapacitors -- free-standing films; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202001144
• Languages: English
• ISSNs: 0947-6539

Abstract

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. Abstract : Skin deep : The electrochemical exfoliation of black phosphorus (BP) in various electrolytes composed of different tetrabutylammonium salts is reported. Few‐layered BP exhibits enhanced catalytic activity for the hydrogen evolution reaction and can be used to fabricate flexible, free‐standing BP films for application in an all‐solid‐state supercapacitor device.