Boron, nitrogen, sulphur heteroatom influence effect on direct growth carbon nanotubes on Ni foam for anode electrodes

Abstract

With the fast expanding market for portable electronic devices and increasing demand for energy storage devices with elevated power and energy density, the biggest challenge facing current researchers is to develop more efficient, low-cost devices. The design and research of carbon nanotubes (CNT) based anode electrode materials has become promising areas of research for supercapacitor technology improvement in energy storage applications. Here, capacitive properties and effects of heteroatoms for example boron (B), sulphur (S), and nitrogen (N) have been investigated for the preparation of direct growth carbon nanotubes by employing simple chemical vapour deposition (CVD) technique. NCNT electrode explored elevated areal capacitance of 6.95 F/cm2 at 0.005 A/cm2, and good capacitive retention of 99.36% at 10 A/g over 10,000 cycles in the three-electrode system. As a result of the favourable bonding of the nitrogen site, the NCNT electrode is a feasible and simple material to enhance the capacitive performance of supercapacitors.