Abstract
In this present work, smoke-like carbon was successfully fabricated from a bio-waste fungal substrate crude polysaccharide for the first time. The as-prepared products possess smoke-like structures, ultra-high specific surface area (SBET: 2160 m2 g−1) and a high content of micropores (microporous surface area of 60%, with a nanopore size of 0.70 nm), which can increase the specific capacitance, representing a wonderful structure for electrochemical energy storage devices. The as-prepared sample displayed an excellent specific capacitance of 152 F g−1 at 5 A g−1 in the three-electrode configuration and exhibited maximal densities of 6.8–10.2 W h kg−1 under power outputs of 253.4–24.3 kW kg−1. We believe that this work demonstrates a simple, green and low-cost route by using agricultural residue to prepare applicable carbon materials for use in energy storage devices.
Highlights
Depletion of fossil fuels and the environmental problems caused by pollution make it imperative to change the current model of energy production and consumption
Electric double-layer capacitors (EDLCs)/supercapacitors [1] are a new type of energy storage device with electrochemical performance between traditional capacitors and batteries that have attracted considerable attention [2]; they have been emerging as an ideal energy storage device for portable electronics, electric vehicles and other high-power applications due to their unique characteristics such as safety, long lifespan, high power density and rapid charge–discharge capability [3,4]
We found that there are still a lot of fungal polysaccharide in the waste fungal substrate (7 wt%); from these wastes, a large amount of crude fungal polysaccharide can still be extracted using traditional methods [18]
Summary
Depletion of fossil fuels and the environmental problems caused by pollution make it imperative to change the current model of energy production and consumption. Electric double-layer capacitors (EDLCs)/supercapacitors [1] are a new type of energy storage device with electrochemical performance between traditional capacitors and batteries that have attracted considerable attention [2]; they have been emerging as an ideal energy storage device for portable electronics, electric vehicles and other high-power applications due to their unique characteristics such as safety, long lifespan, high power density and rapid charge–discharge capability [3,4] They still suffer from low energy royalsocietypublishing.org/journal/rsos R. This approach has great potential for realizing large-scale green and low-cost production of biomass carbon materials for future energy storage applications [19]. The material shows outstanding specific capacitance in the three-electrode system This approach is of great potential for realizing large-scale green and low-cost production of biomass carbon materials for future energy storage applications
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