 The new MOF nano-sheet, CoBTBLB, was successfully synthesized through a liquid, liquid interface assisted method. It was then characterized by SEMs slash EDX, XPS, HRTM, and AFM. The results confirmed its sheet-like structure and showed it to have excellent electrochemical properties. These properties were further demonstrated in an asymmetric supercapacitor device, where CoBTBLB was used as a positive electrode. The resulting device had a maximum energy density of 150.2 WHKG-1 and a power density of 1619.2 WKG-1, demonstrating the potential of this material for use in future applications. This article was authored by Qian Liu, Xinqigua, Song Wang, and others.