Preparation and Characterization of Physically Activated Carbon and Its Energetic Application for All-Solid-State Supercapacitors: A Case Study

Abstract

Biomass-derived activated carbons have gained significant attention as electrode materials for supercapacitors (SCs) due to their renewability, low-cost, and ready availability. In this work, we have derived physically activated carbon from date seed biomass as symmetric electrodes and PVA/KOH has been used as a gel polymer electrolyte for all-solid-state SCs. Initially, the date seed biomass was carbonized at 600 °C (C-600) and then it was used to obtain physically activated carbon through CO 2 activation at 850 °C (C-850). The SEM and TEM images of C-850 displayed its porous, flaky, and multilayer type morphologies. The fabricated electrodes from C-850 with PVA/KOH electrolytes showed the best electrochemical performances in SCs (Lu et al. Energy Environ. Sci., 2014, 7, 2160 application. Cyclic voltammetry was performed from 5 to 100 mV s −1 , illustrating an electric double layer behavior. The C-850 electrode delivered a specific capacitance of 138.12 F g −1 at 5 mV s −1 , whereas it retained 16 F g −1 capacitance at 100 mV s −1 . Our assembled all-solid-state SCs exhibit an energy density of 9.6 Wh kg −1 with a power density of 87.86 W kg −1 . The internal and charge transfer resistances of the assembled SCs were 0.54 and 17.86 Ω, respectively. These innovative findings provide a universal and KOH-free activation process for the synthesis of physically activated carbon for all solid-state SCs applications.

Advancements in Olive‐derived Carbon: Preparation Methods and Sustainable Applications

“…Because of the various applications and benefits of carbon obtained from biomass, researchers have been actively exploring numerous types of plant by-products that can effectively be utilized for carbon production. [26][27][28][29] Several plant by-products that have been studied include date palm leaflet, [30] mango leaves, [31] tectonas grandis, [32] albizia procera leaves, [33] Paraserianthes falcataria, [34] syzygium cumini leaves, [35] rice straws, [36] taro stems, [37] Elaeis guineensis, [38] rice husks, [39] sugarcane waste, [40] Pithophora polymorpha, [41] corn silks, [42] tomato stems, [43] switchgrass, [44] barley straws, [45] miscanthus, [46] sunflower piths, [47] willow wood, [48] lotus stalks, [49] jute stick, [50] poplar wood, [51] peanut shell, [52] algae, [53] carrot residue, [54] bamboo-leaf, [55] citrus fruits, [56] seed shells of jatopha curcas, [57] orange peel, [58] and elephant grass. [59] Fatima Omar Al-Qwairi, an esteemed physicist, holds a Master's in Physics of Materials and a Bachelor's in Physics from Imam Abdulrahman bin Faisal University in 2021 and 2017, respectively.…”

Coal-Derived Porous Carbon as Versatile Electrode Materials for Aqueous, Water-in-Salt, and Organic Electrolytes, and Fabrication of Pouch Cell Supercapacitor toward Power Application

“…In this regard, carbon derivatives are acknowledged as prominent electrode materials to fabricate supercapacitors and lithium-ion batteries owing to their economic viability, good chemical stability, environmental friendliness, high electrical conductivity, and easy availability of raw materials. Carbon based materials such as activated carbon, carbon black, hierarchical porous carbon, and carbon nanofibers have emerged as potential electrode materials for supercapacitors. Porous carbon is usually employed on account of its high surface area, well-developed pore structure, and distinctive electron conductivity. , Even though porous carbon has a high surface area, its performance could be dissatisfactory due to the inefficient use of the pore distribution and the surface .…”