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Risoluzione schermo: 640 x 480 800 x 600 1024 x 768 1280 x 1024 Nome utente: Password: Formato: Basic  Help  Richiesta  Formato: Tipo di Carattere Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Dimensione del Carattere 1 2 3 4 5 6   Colore del Carattere Nero Rosso Giallo Rosa Verde Arancione Viola Blu Beige Marrone Verde Bosco Blu scuro Marrone scuro Verde chiaro Messaggio: HTML non è attivo Il codice su forum è attivo Faccine [quote][i]Originariamente inviato da SAKURAJUN[/i] [br]Synthesis of O-doped coal-based carbon electrode materials by ultrasound-assisted bimetallic activation for application in supercapacitors[url=https://www.chinactivecarbon.com/]https://www.chinactivecarbon.com/[/url] Abundantly available low-grade coal is used to prepare activated carbon (AC) for supercapacitor (SCs) electrode materials. Aiming to transform low-grade coal into pore structure, microcrystalline, and surface chemistry multi-scale coordinated AC, a new ultrasound-assisted bimetallic activation strategy is proposed. The introduction of ultrasonic waves in the FeCl3/MgCl2 co-impregnation process synergistically controls the pore and microcrystalline structure of the precursor. Meanwhile, the surface modification is performed in a CO2 atmosphere. Comparative experiments and density functional theory (DFT) calculations show that the AC-20 possesses abundant micropores (0.92 cm3 g#8722;1), appropriate mesopores (0.40 cm3 g#8722;1), high specific surface area (SSA, 2329 cm2 g#8722;1), low impurity content, and is highly O-doped (13.65 at.%), which are essential for enhancing carbon-based electrochemical processes. Meanwhile, the graphitization degree improves (ID/IG is down to 0.89), stability enhances (TGA curves shift right), and electrical resistivity decreases (Re is 0.15 #937; cm#8722;1). Therefore, AC-20 has a specific capacitance (C) of 309 F g#8722;1 at 0.5 A g#8722;1. Furthermore, AC-20//AC-20 can reach an energy density (E) of 9.6 Wh kg#8722;1 when the power density (P) is 250 W kg#8722;1. [url=https://www.chinactivecarbon.com/products/coal-activated-carbon-pellets.html]coal activated carbon pellets[/url]Combined with low price, abundant reserves, a simple preparation method, and good practicability, the obtained AC-20 has great potential to expand production. [/quote]   Seleziona qui per inserire la tua firma.