Sodium-ion capacitors (SICs) have emerged significantly in the last decades due to their high energy, high power with rapid energy deliverability, and sustainability quotient as an alternative to lithium-ion capacitors (LICs). In this study, a jute-based precursor-derived carbon is chemically activated with or without microwave pretreatment and tested in aqueous and non-aqueous symmetric and asymmetric SICs. The synthesized microwave pretreated activated carbon (AJPC-M) exhibits more defect and micro/ mesoporosity with a high surface area of 1529.75 m2 g-1 with a high specific capacitance of 1166 Fg-1 at the current density of 1 Ag-1 and excellent rate capability of 470 Fg-1 at 10 Ag-1 in the three-electrode aqueous system. The symmetric sodium-ion capacitor (SSIC) with AJPC-M-based capacitor in an aqueous medium delivered a high energy density of 37.7 Wh kg- 1 at the specific power of 785 Wkg-1 and a maximum specific power of 7895 Wkg-1 with a specific energy of 9.75 Whkg-1 at 1 Ag- 1 and 10 Ag-1, respectively. 100% gravimetric capacitance is retained for 9000 cycles at 8 Ag-1. In the non-aqueous system, the AJPC-M cathode displays the specific capacity of 89 mAh g-1 at the current density of 0.02 Ag-1. The symmetric sodium-ion capacitor (SSIC) in a non-aqueous system delivers a maximum energy density of 60 Whkg-1 at a specific power of 510 Wkg-1 and a maximum specific power of 3570 Wkg-1. The concept check on the hybrid sodium-ion asymmetric capacitor (ASIC) with activated (APJC-M) as cathode and hard carbon (JPC-D) as the anode, derived from the same jute-based precursor, delivered an improved performance with 86 Whkg-1 at a specific power of 636 Wkg-1 and realized a maximum specific power of 3440 Wkg-1. The excellent electrochemical capacitance of jute-derived micro-mesoporous activated carbon with more defects, high surface area, larger pore volume, and optimum pore size distribution demonstrates a cost-effective porous activated carbon for powering both anode and cathode for both symmetric and hybrid SIC devices.

You have access to this article

Please wait while we load your content... Something went wrong. Try again?