Two-dimensional SnO₂ anchored biomass-derived carbon nanosheet anode for high-performance Li-ion capacitors

Abstract

In this work, we have fabricated lithium-ion capacitor using SnO2/PCN as anode and waste coffee grounds derived PCN as cathode, which delivers good combination of high energy and power characteristics.

Microstructured nitrogen-doped graphene-Sn composites as a negative electrode for high performance lithium-ion hybrid supercapacitors

“…In the best case in terms of cyclability, ref. 43 (100 W h kg À1 @ 10 000 W kg À1 ), aer 10 000 cycles the capacitance drops to 90%. Furthermore, these studies not always provide the operating range of the negative electrode (especially at high currents), which does not rule out lithium plating in these systems.…”

The second life of coffee can be even more energizing: Circularity of materials for bio-based electrochemical energy storage devices

“…68 Very recently, carbon nanotubes and graphene nanosheets have been used to create a hierarchical porous structure on a 3D skeleton derived from coffee waste, 69 while SnO 2 and Ru composites with CDC have been proposed for hybrid capacitors. 70,71 As already mentioned, the binder, usually an electrically inactive material, can be crucial not only for the processing of the carbon to prepare the relevant electrode, but also for the overall performance of the material and device. Reduced graphene oxide (RGO) was used as a conductive binder for activated CDC, in place of the conventional PVDF.…”

Integrating N-Doped Porous Carbon-Encapsulated Ultrafine SnO2 with MXene Nanosheets via Electrostatic Self-Assembly as a Superior Anode Material for Lithium Ion Capacitors

“…Graphite is the most common anode so far because it is inexpensive and easily available. However, the low theoretical capacity (372 mAh g –1 ) and severely hindered intercalation/deintercalation behavior under high current density due to high crystallinity and anisotropic layered structure make researchers focus on new materials such as traditional graphite-based anodes with special defects and transition-metal oxides (TMOs). − TMOs, such as Fe 3 O 4 , SnO 2 , − MnO x , , CoO, , NiO, and NbO 2 etc., are new series of anode materials that provide much higher specific capacity than that of the graphite. Among them, SnO 2 becomes one of the most promising materials because of its high theoretical specific capacity (783 mAh g –1 for alloying/dealloying reaction, and 711 mAh g –1 for conversion reaction that is partly reversible), low active potential, abundant reserves, and environmentally friendly properties .…”