Porous 3D Honeycomb Structure Biomass Carbon as a Supercapacitor Electrode Material to Achieve Efficient Energy Storage

Abstract

Advanced carbon materials with high specific surface area (SSA), porous structure, and good conductivity are the key factors to obtaining efficient energy storage and conversion devices. Here, a simple gas-phase cycle reaction was used to prepare a carbon material with 3D honeycomb structure derived from seaweed powder. The as-obtained carbon material (CS-2) exhibited excellent SSA (1206.97 m2 g–1) and good surface wetting properties. In particular, the CS-2 material exhibits very high specific capacitance (448.3 F g–1) and stable cycle life (∼91.39% capacitance retention after 3000 cycles) due to the special porous structure on its surface. To test the applicability of the material in practice, CS-2 was assembled into a simple symmetrical supercapacitor (SC), which achieved a maximum energy density of 3.125 W h kg–1. The above performance analysis indicates that the carbon material based on seaweed powder can be efficiently used as an electrode material for SCs.

O and N co-doped porous carbon derived from crop waste for a high-stability all-solid-state symmetric supercapacitor

“…The all-solid-state symmetric supercapacitor exhibited an acceptable energy density of 8.34 W h kg −1 at 247.95 W kg −1 , which is better than the performance reported in some previous studies. 25,44,47–50…”

“…The all-solid-state symmetric supercapacitor exhibited an acceptable energy density of 8.34 W h kg À1 at 247.95 W kg À1 , which is better than the performance reported in some previous studies. 25,44,[47][48][49][50] As an important parameter for evaluating its potential application, the cycling stability of the SPC/700 1C/3-based allsolid-state symmetric supercapacitor was assessed at 5 A g À1 (Fig. 6f).…”

Construction of Anthraquinone-Containing Covalent Organic Frameworks/Graphene Hybrid Films for a Flexible High-Performance Microsupercapacitor

“…Considering all these prospects, an in situ synthetic method has been innovated to load graphene oxide into the COF matrix. Graphene is a promising conductive carbon material, because of the good conductivity, synthetic diversity, and high specific surface area. − However, graphene nanosheets are prone to be restacked owing to powerful van der Waals interactions between close nanosheets during the electrode manufacturing or charge/discharge cycling, which can affect the availability of the specific surface area for the electrolyte ion. − Therefore, similar to diverse 2D materials, the electrochemical property of most graphene-based materials is lower than the theoretical specific double-layer capacitance. − However, in the COF@rGO hybrid film, the multiple π electrons in the covalent organic frameworks assist π–π interactions with reduced graphene oxide . Benefiting from the in situ synthesis of the COF along the surface of the two-dimensional reduced graphene oxide nanosheets, the COF maintains a relatively few-layer structure, which could reduce the diffusion pathway and therefore promote ion diffusion.…”

Pre‐eminent design and performance of hybrid diatomic sulphide materials for supercapacitor applications

“…Energy technology has received substantial attention to conquer the descent of nature and running down of fossil fuels 1‐3 . Scientists have been driven by the need for functional and efficient energy conversion/storage devices to develop competent sustainable energy storage technologies that will benefit society.…”

“…Energy technology has received substantial attention to conquer the descent of nature and running down of fossil fuels. [1][2][3] Scientists have been driven by the need for functional and efficient energy conversion/storage devices to develop competent sustainable energy storage technologies that will benefit society. For storage applications, high-performance supercapacitors are often produced utilizing a variety of metal oxides/hydroxides, metal sulphides (MSs), MXenes, transition metal chalcogenides, conducting polymers, and other carbon-based electrode materials.…”