Polybenzoxazine-Based Nitrogen-Containing Porous Carbon and Their Composites with NiCo Bimetallic Oxides for Supercapacitor Applications.

Autor: Periyasamy T; Department of Fiber System Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea., Asrafali SP; School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea., Kim SC; School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea., Kumar DR; Centre for Organic and Nanohybrid Electronics, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland., Lee J; Department of Fiber System Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.
Jazyk: angličtina
Zdroj: Polymers [Polymers (Basel)] 2024 Feb 03; Vol. 16 (3). Date of Electronic Publication: 2024 Feb 03.
DOI: 10.3390/polym16030430
Abstrakt: Supercapacitors (SCs) are considered as emerging energy storage devices that bridge the gap between electrolytic capacitors and rechargeable batteries. However, due to their low energy density, their real-time usage is restricted. Hence, to enhance the energy density of SCs, we prepared hetero-atom-doped carbon along with bimetallic oxides at different calcination temperatures, viz., HC/NiCo@600, HC/NiCo@700, HC/NiCo@800 and HC/NiCo@900. The material produced at 800 °C (HC/NiCo@800) exhibits a hierarchical 3D flower-like morphology. The electrochemical measurement of the prepared materials was performed in a three-electrode system showing an enhanced specific capacitance for HC/NiCo@600 (Cs = 1515 F g -1 ) in 1 M KOH, at a current density of 1 A g -1 , among others. An asymmetric SC device was also fabricated using HC/NiCo@800 as anode and HC as cathode (HC/NiCo@600//HC). The fabricated device had the ability to operate at a high voltage window (~1.6 V), exhibiting a specific capacitance of 142 F g -1 at a current density of 1 A g -1 ; power density of 743.11 W kg -1 and energy density of 49.93 Wh kg -1 . Altogether, a simple strategy of hetero-atom doping and bimetallic inclusion into the carbon framework enhances the energy density of SCs.
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje