Power Lithium Ion Capacitor Using Carbon Silicon Oxycarbide And Snake Fruit Rinds Activated Carbon �Ć

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TUltrahigh power lithium ion capacitor using lithiated silicon oxycarbide and snake fruit rinds activated carbon†
*a,b
In this study, we report reports an approach to form an exceptionally high-power lithium-ion capacitor (LIC) using environmentally friendly lithiated silicone oxycarbide (SiOC) material derived from phenyl-rich silicone oil as the anode and activated carbon via KOH activation of snake fruit rinds (SKOH) as the cathode. A battery-type SiOC anode exhibited an incredibly high rate capability in which one third of its initial capacity was maintained even after the discharge current density increased up to 1,600 fold (from 0.05 to 80 A g-1). Moreover, the SKOH cathode demonstrated a massive surface area of 2,638 m2 g-1 promoting a remarkably high capacitance. When coupled to lihtium metal in a cell, the maximum power density of SKOH in LIC was 7.4 × 106 W kg-1 at a current density of 103 W h kg-1 (a loading mass of c.a. 4 mg cm-2). The optimized lithiated SiOC anode and SKOH cathode were paired in an LIC cell, providing a maximum power density of 156,000 W h kg-1 at an energy density of 25 W h kg-1. Moreover, the LIC demonstrates an outstanding cycle retention of 93% after 78,000 cycles. Introduction
The growing market of heavy-duty electrical vehicles has significantly increased the demand for advanced energy storage systems that can deliver high power and energy density and long cycle life.1–3 Although batteries have been successfully utilized in

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