Unlocking the potential of La-doped iron oxide @graphene oxide and ionic liquid-based asymmetric supercapacitor. (25th November 2022)

• Record Type: Journal Article
• Authors: Pathan, Sumayya C.; Shaikh, Navajsharif S.; Mali, Sawanta S.; Patil, Jyoti V.; Katkar, Pranav K.; Padalkar, Navnath S.; Praserthdam, Supareak; Hong, Chang Kook; Kanjanaboos, Pongsakorn; Shaikh, Jasmin S.
• Is Part Of: Journal of energy storage. Volume 55:Part C(2022)
• Publication Date: 2022-11-25
• Subjects: Cs specific capacitance -- PD power density -- ED energy density -- EDLC electrical double layer capacitor -- AC activated carbon -- GO graphene oxide -- ASC asymmetric supercapacitor; Asymmetric supercapacitors -- Ionic liquid -- Iron oxide -- Lanthanum -- Manganese oxide -- Graphene oxide; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2022.105642
• Languages: English
• ISSNs: 2352-152X

Abstract

Abstract: Herein, lanthanum-doped iron oxide-integrated graphene oxide (10%La-Fe2 O3 @GO) as an anode and β-MnO2 as a cathode material were successfully obtained via a facile hydrothermal method. The 10%La-Fe2 O3 @GO shows excellent electrochemical performance due to doping of rare earth La 3+ metal ions in the Fe2 O3 @GO, providing abundant active sites. The 10%La-Fe2 O3 @GO was operated at a high potential window (−1.2 V) with an excellent specific capacitance (Cs) of 682.3 F/g at 1 A/g current density and capacitance retention of 83% over 5000 cycles. Moreover, the configured MnO2 //Na2 SO4 //10%La-Fe2 O3 @GO aqueous device (Aq-ASC) was operated at a potential window of +1.6 V and delivered a maximum energy density of 19.5 Wh/kg at 0.9 kW/kg power density with Cs of 62.5 F/g at 1 A/g current density. Also, this device exhibited 87% retention over 5000 cycles. The quasi-solid state ionic liquid-based [BMIM][PF6 ] configuration of MnO2 //[BMIM][PF6 ]//10%La-Fe2 O3 @GO (Iq-ASC) at a potential window of +4 V delivered a maximum energy density of 104.2 Wh/kg at 270.2 W/kg with Cs of 46.9 F/g at 0.1 A/g; this device is a perfect model for heavy-duty applications and hybrid vehicles due to ability to its adequate energy density at high-power density. Graphical abstract: Unlabelled Image Highlights: Facile technique is demonstrated La doped Fe2 O3 integrated with graphene oxide. Iron oxide-based anode evades the sluggish reaction. Fabricated aqueous and ionic asymmetric supercapacitor exhibited highest specific capacitance. The values reported are one of the highest for ionic liquid based asymmetric device.