Saha, Sanjit Jana, Milan Khanra, Partha Samanta, Pranab Koo, Hyeyoung Murmu, Naresh Chandra Kuila, Tapas 2024-01-20T06:33:32Z 2024-01-20T06:33:32Z 2021-09-05 2015-07-08 1944-8244 https://pubs.kist.re.kr/handle/201004/125240 Nanostructured hexagonal boron nitride (h-BN)/reduced graphene oxide (RGO) composite is prepared by insertion of h-BN into the graphene oxide through hydrothermal reaction. Formation of the super lattice is confirmed by the existence of two separate UV-visible absorption edges corresponding to two different band gaps. The composite materials show enhanced electrical conductivity as compared to the bulk h-BN. A high specific capacitance of similar to 824 F g(-1) achieved at a current density of 4 A g(-1) for the composite in three-electrode electrochemical measurement. The potential window of the composite electrode lies in the range from -0.1 to 0.5 V in 6 M aqueous KOH electrolyte. The operating voltage is increased to 1.4 V in asymmetric supercapacitor (ASC) device where the thermally reduced graphene oxide is used as the negative electrode and the h-BN/RGO composite as the positive electrode. The ASC exhibits a specific capacitance of 145.7 F g(-1) at a current density of 6 A g(-1) and high energy density of 39.6 W h kg(-1) corresponding to a large power density of similar to 4200 W kg(-1). Therefore, a facile hydrothermal route is demonstrated for the first time to utilize h-BN-based composite materials as energy storage electrode materials for supercapacitor applications. English American Chemical Society ATOMIC LAYERS FABRICATION NANOWIRE COMPOSITES NANOSHEETS REDUCTION NANOTUBES ARRAYS FOAM Band Gap Engineering of Boron Nitride by Graphene and Its Application as Positive Electrode Material in Asymmetric Supercapacitor Device Article 10.1021/acsami.5b03562 1 ACS Applied Materials & Interfaces, v.7, no.26, pp.14211 - 14222 ACS Applied Materials & Interfaces 7 26 14211 14222 scie scopus 000357963700007 2-s2.0-84936887122 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article ATOMIC LAYERS FABRICATION NANOWIRE COMPOSITES NANOSHEETS REDUCTION NANOTUBES ARRAYS FOAM graphene boron nitride band gap supercapacitor energy density