Waste Tire Pyrolysis Oil-based Porous Carbon Controlled Preparation Of Materials And Their Capacitive Energy Storage Characteristics

In this work,the heavy and light distillations of waste tire pyrolysis oil（WTPO）are used as raw materials to prepare porous carbon nanorods and hexagon-like porous graphene,and the capacitive behaviors of them in capacitive energy-storage devices are investigated.The conversion of waste tire pyrolysis oil into porous carbon nanorods（labeled as WPCNs）with hierarchical pore structure is realized by a simple template-directed approach.The specific surface area of as-obtained porous carbon nanorods can reach up to 1448 m² g^-1 without the addition of any activating agent.As the capacitive electrode,WPCNs possess the extraordinary compatibility to capacitance,different electrolyte systems as well as long-term cycle life even at a commercial-level areal mass loading(10 mg cm^-2).The relationship between the pore structure and capacitive behavior is analyzed by comparing WPCNs with mesopores-dominated asphalt-derived porous carbon nanorods（APCNs）and micropores-dominated activated carbon.In addition,the excellent capacitive performance of WPCNs as self-supporting independent electrodes to assemble double-layer supercapacitors in organic systems reveals their good bulk performance.The porous graphene derived from the chemical liquid deposition（CLD）methodology using waste tire pyrolysis oil as carbon precursor possesses the hexagon-like microarchitecture decorated with abundant mesoporous structure,good non-stacking property and excellent amphipathic property.The developed technique has the strong anti-stacking behavior to graphene as compared to the conventional chemical vapor deposition（CVD）.The outstanding lubricating function of WTPO and strong London dispersion force between WTPO and Mg O catalyst,devotes to forming the few-layered graphene with non-stacking state.As the electrode for symmetric supercapacitors,CLD-derived graphene（CLDG）not only possesses superior capacitive storage ability over those of graphene derived from CVD and commercial activated carbon under aqueous and organic electrolyte systems,but also presents excellent compatibility to gravimetric and areal capacitances even under the commercial mass loading level(10 mg cm^-2).Besides,Li ion capacitor assembled with CLDG as cathode and anode delivers the satisfactory Ragone performance and ultralong cycle life.Because of the outstanding non-stacking feature and well-developed pore channels,the overall interface of CLDG electrode can be sufficiently accessed by electrolyte ions,contributing to its exceptional capacitive behavior.In this work,high-quality hierarchically porous carbon and strong anti-stacking porous graphene are prepared by simple template-directed approach and chemical liquid deposition method respectively.Furthermore,this work also provides a valuable strategy to prepare the electrode material with high capacitive energy-storage ability through the high value-added utilization of WTPO.