Contents lists available at ScienceDirect Journal of Power Sources journal homepage: www.elsevier.com/locate/jpowsour MoS 2 flakes integrated with boron and nitrogen-doped carbon: Striking gravimetric and volumetric capacitive performance for supercapacitor applications Anukul K. Thakur a,* , Mandira Majumder b , Ram B. Choudhary b , Shashi B. Singh a a Department of Physics, Indian Institute of Science Education and Research Berhampur, Berhampur, 760010, Odisha, India b Nanostructured Composite Materials Laboratory, Department of Applied Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India HIGHLIGHTS • Composite with integrated BCN and MoS 2 shows augmented capacitive properties. • BCN/MoS 2 composite shows excellent volumetric capacitance due to high density. • Created interlayer interfaces enhance coulombic efficiency and cyclic stabi- lity. • The energy and power density for the BCN/MoS 2 composite also undergo a boost. GRAPHICAL ABSTRACT ARTICLE INFO Keywords: BCN MoS 2 Supercapacitor Electrochemical performance ABSTRACT Boron and nitrogen co-doped carbon (BCN) seems to exhibit excellent electrochemical properties very suitable as electrode material for supercapacitor applications. On the other hand, MoS 2 possessing sheet-like structure proves to be favorable for electrolytic ion intercalation. Here in composites resulting from hydrothermally in- tegrated MoS 2 flakes with the BCN have been studied to determine its potency as electrode material for su- percapacitor application. Owed to the high packing density of layered MoS 2 flakes the as-prepared BCN/MoS 2 composite exhibits high volumetric capacitance corresponding to a value of 798 F cm -3 together with the en- hanced gravimetric capacitance of 283 F g -1 at the current density of 1 A g -1 . Electrochemical studies reveal improved coulombic efficiency, energy, and power densities for the as-prepared BCN/MoS 2 composite owed to the established synergy and the presence of interfaces involving two different materials. These results clearly show the usefulness of integration BCN and MoS 2 flakes resulting in BCN/MoS 2 hybrid as an apt electrode material for supercapacitor application. 1. Introduction Ever increasing threats to the environment due to increased pollu- tion and over-drainage of the existing conventional sources of energy bring forth the necessity of developing clean, renewable, and sustain- able alternative sources of energy. In addition, the ever-growing technical dependency necessitates the development of efficient, min- iaturized, and flexible devices that can provide technical comfort much sought. The renewable sources of energy which are available so far fall intermittent calling for the need for integration of these sources with efficient energy storage systems to render them to practical uses. The most widely used energy storage systems include batteries and https://doi.org/10.1016/j.jpowsour.2018.09.029 Received 24 April 2018; Received in revised form 28 August 2018; Accepted 11 September 2018 * Corresponding author. E-mail address: anukulphy@iiserbpr.ac.in (A.K. Thakur). Journal of Power Sources 402 (2018) 163–173 0378-7753/ © 2018 Elsevier B.V. All rights reserved. T