Carbyne-enriched carbon anchored on nickel foam: A novel binder-free electrode for supercapacitor application

Vimal Kumar Mariappan; Karthikeyan Krishnamoorthy; Parthiban Pazhamalai; Surjit Sahoo; Sang-Jae Kim

doi:10.1016/j.jcis.2019.08.055

Carbyne-enriched carbon anchored on nickel foam: A novel binder-free electrode for supercapacitor application

J Colloid Interface Sci. 2019 Nov 15:556:411-419. doi: 10.1016/j.jcis.2019.08.055. Epub 2019 Aug 16.

Authors

Vimal Kumar Mariappan¹, Karthikeyan Krishnamoorthy¹, Parthiban Pazhamalai¹, Surjit Sahoo¹, Sang-Jae Kim²

Affiliations

¹ Nanomaterials Laboratory, Department of Mechatronics Engineering, Jeju National University, Jeju 63243, Republic of Korea.
² Nanomaterials Laboratory, Department of Mechatronics Engineering, Jeju National University, Jeju 63243, Republic of Korea; Department of Advanced Convergence Science and Technology, Jeju National University, Jeju 63243, Republic of Korea. Electronic address: kimsangj@jejunu.ac.kr.

PMID: 31472315
DOI: 10.1016/j.jcis.2019.08.055

Abstract

Carbon- and carbon derivatives are widely employed as efficient electrode materials for supercapacitor applications. Herein, we demonstrate a cost-effective dip-coating process followed by dehydrohalogenation of PVDF-Ni for the preparation of carbyne enriched carbon anchored on nickel (CEC-Ni) as high-performance electrode material. The removal of halogens in the prepared CEC-Ni were widely characterized using XRD, XPS, Laser Raman, and FT-IR analysis. The occurrence of carbon-carbon vibration in the prepared CEC-Ni foam was confirmed using FT-IR spectroscopy. Laser Raman analysis confirms that the CEC-Ni foam contains both sp and sp² hybridized carbon. The electrochemical properties of prepared carbyne enriched carbon anchored on nickel foam electrode (CEC-NiE) showed an ideal capacitive properties and delivered a maximum specific capacitance of about 106.12 F g^-1 with excellent cyclic retention. Furthermore, the mechanism of charge-storage in the CEC-NiE was analyzed using Dunn's method. In additon, the asymmetric supercapacitor device was fabricated using CEC-NiE as positive and rGO as negative electrode achieved a remarkable energy density of 33.57 Wh Kg^-1 with a maximal power density of 14825.71 W Kg^-1. These results suggested that the facile preparation of CEC-NiE could be a promising and effective electrode material for future energy storage application.

Keywords: Asymmetric supercapacitor; Binder-free electrode; Carbyne-enriched carbon-Ni; Dehydrohalogenation; Energy storage.