Boron-doped silicon carbide (SiC) thin film on silicon (Si): a novel electrode material for supercapacitor application
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Boron-doped silicon carbide (SiC) thin film on silicon (Si): a novel electrode material for supercapacitor application Kusumita Kundu1,2, Arnab Ghosh3, Apurba Ray4, Sachindranath Das4, Joy Chakraborty5, Suresh Kumar5, Namburi E. Prasad5, and Rajat Banerjee1,2,* 1
CSIR-Central Glass and Ceramic Research Institute, Council of Scientific & Industrial Research, Govt. of India, 196, Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, India 2 Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India 3 SN Bose National Centre for Basic Sciences, Kolkata 700106, India 4 Department of Instrumentation Science, Jadavpur University, Jadavpur, Kolkata 700032, India 5 Defence Materials and Stores Research and Development Establishment, GT Road, Kanpur 208 013, India
Received: 30 June 2020
ABSTRACT
Accepted: 25 August 2020
In this work, we report the synthesis of silicon carbide (SiC) thin film on silicon by modified chemical vapour deposition technique using boron-doped liquid polycarbosilane as a precursor. Subsequent microscopic and physical characterizations of this film show the presence of SiC nanocrystal along with boron in the SiC thin film. The electrochemical characterizations of the film shows a highest capacitance of 232F/g at 2.2A/g current density from Galvanostatic charging–discharging method with good cyclic stability upto 2000 cycles. The high capacitance value is attributed to the surface defect states and amorphous carbon which acts as the charge active sites. The result further infers that the (B)SiC/Si is a promising electrode material for high-performance energy storage application.
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Springer Science+Business
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1 Introduction In the last couple of years, the energy sector has focused on the usage of several alternative energy resources including developments of supercapacitors (SCs) which seem to have a very promising future because of their high storage capacities [1–3]. Supercapacitors (SC) have a great advantage over batteries
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https://doi.org/10.1007/s10854-020-04346-y
as SCs can store charge electrostatically on the surface and it can be charged very quickly, leading to high power density [4–6]. However, the properties of the active material used for the fabrication of the electrode play a very prominent role on the performance of supercapacitors. There are two kinds of supercapacitor based on the charge storage mechanism i.e. electric double-layer capacitor (EDLC) and pseudocapacitor. EDLC stores the charge electrostatically at
J Mater Sci: Mater Electron
the surface of the electrode, whereas pseudocapacitor involves the faradic absorption/desorption of the ions. Porous carbonaceous materials such as carbon nanotubes, graphene and porous carbon have received immense attention to the researcher as efficient electrode material for applications in EDLC due to their good conductivity and good cyclic stability [7–10]. In addition to the carbonaceous material, transition metal ox
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