Ultralong-Life Supercapacitors Using Pyridine-Derived Porous Carbon Materials

Abstract

Supercapacitors are widely used in power reserves and portable power devices because of their rapid charge and discharge rates and excellent cycle performance. Carbon materials have the characteristics of large specific surface areas, excellent electrical conductivity, good chemical stability, and low price, so they are very attractive as electrode materials for supercapacitors. In recent decades, the electrochemical properties of supercapacitors based on porous carbon have attracted much interest. Through the design of supercapacitors of reasonable appearance, pore shape, and surface characteristics, their electrochemical performance has been significantly improved. Herein, a simple and easy process is developed to synthesize a new kind of porous carbon materials with N,O-doping. The constructed supercapacitor with the as-prepared carbon material exhibits excellent capacitance performance and rapid charge and discharge rates (<1 s, 20 A/g, two-electrode cell), ultralong cycle life (>89,000 cycles, 10 A/g), large specific capacitance (276.5 F/g, 0.5 A/g), and excellent energy density (38.4 W/h/kg). Its superior properties make it one of the best candidate electrode materials for supercapacitors derived from ligands. Its excellent supercapacitor performance is probably related to its high ion-accessible specific surface area, hierarchical regular pore structure, and well N,O-doping on the surface of the carbon composite. This study provides a feasible strategy for the development of high-performance supercapacitors suitable for commercial applications.

Nickel(II) Cluster-Based Pillar-Layered Metal–Organic Frameworks for High-Performance Supercapacitors

“…The solid product was heated to 700 °C for 2 h under a N 2 atmosphere. The resulting product was sequentially washed three times with 2 M HCl, deionized water, and anhydrous ethanol, followed by drying in an electric blast oven at 80 °C to obtain a black nitrogen-doped porous carbon (NDC) product (yield about 21 wt % based on Bptp) …”

Hierarchically Porous and Nitrogen-Rich Carbon Materials Derived from Polyimide Waste for High-Performance Supercapacitor Applications

“…The growing shortage of fossil fuels and increasing concerns about global pollution have been promoting the development of efficient energy storage devices to alleviate these pressures. − Supercapacitors are popular energy storage devices due to their excellent cycle performance, fast charge–discharge capability, high power density, and low maintenance cost, − making them promising candidates in many emerging industries and fields …”

Spent Tea-Waste-Derived Porous Carbon-Supported Truncated Octahedral Cu2O for Highly Efficient Energy Storage Devices

“…Hence, we have used spent tea wastes as the source of porous carbon. Biomass-derived porous carbon is considered an excellent electrode material in recent years owing to its low cost, good chemical stability, high charge storage performance and conductivity, large surface area with a hierarchical porous network, and long cycle life. ,,− However, the low specific capacitance ( C S ) and energy density, and sluggish charge–discharge rate limit its full-blown applications. , Transition metal oxides (TMOs) are another group of materials which is gaining immense attention in recent years. The presence of multiple active sites, rich valences, superior electronic conductivity, and fast electrochemical reaction rates because of reversible reaction mechanisms has proved their potential to be used for the preparation of energy storage materials. − Cu 2 O, having an octahedral structure, is one of the copper-based pseudocapacitive materials which is a promising electrode material because of its large earth abundance, good conductivity, nontoxicity, high C S value, and low cost.…”

“…14,16,19−29 However, the low specific capacitance (C S ) and energy density, and sluggish charge−discharge rate limit its full-blown applications. 30,31 Transition metal oxides (TMOs) are another group of materials which is gaining immense attention in recent years. The presence of multiple active sites, rich valences, superior electronic conductivity, and fast electrochemical reaction rates because of reversible reaction mechanisms has proved their potential to be used for the preparation of energy storage materials.…”