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Preparing two-dimensional microporous carbon from Pistachio nutshell with high areal capacitance as supercapacitor
Jiandong Xu1, Qiuming Gao1, Yunlu Zhang1
1Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, Beijing 100191, P. R. China.
Scientific Reports
|July 3, 2014
Summary
This study presents AC-SPN-3, a novel 2D porous carbon derived from pistachio nutshells. This sustainable material exhibits excellent properties for energy storage applications.
Area of Science:
- Materials Science
- Electrochemistry
- Sustainable Chemistry
Background:
- Developing advanced porous carbon materials is crucial for high-performance energy storage devices.
- Utilizing waste materials for synthesis offers a sustainable approach to carbon material production.
- Pistachio nutshells represent an abundant and underutilized biomass resource.
Purpose of the Study:
- To synthesize and characterize a novel 2D porous carbon (AC-SPN-3) from natural waste pistachio nutshells.
- To evaluate the electrochemical performance of AC-SPN-3 as an electrode material for energy storage.
- To investigate the structure-property relationships governing the performance of the synthesized carbon.
Main Methods:
- High-yield synthesis of AC-SPN-3 via pyrolysis of pistachio nutshells followed by KOH activation.
- Characterization of AC-SPN-3 morphology, surface area, and pore structure using techniques like SEM and BET analysis.
- Electrochemical performance evaluation in aqueous (KOH) and organic (TEABF4 in EC-DEC) electrolytes, including capacitance and energy density measurements.
Main Results:
- AC-SPN-3 achieved a high micropore volume ratio (83%) and surface area (1069 m²/g).
- The material possesses a curved 2D lamellar morphology with uniform pores (median diameter ~0.76 nm), suitable for electrolyte ion accessibility.
- Demonstrated significant areal capacitance (29.3/20.1 μF/cm²) and high energy density (10/39 Wh/kg) in different electrolytes.
Conclusions:
- AC-SPN-3 derived from pistachio waste shows excellent potential as a high-performance electrode material for supercapacitors.
- The optimized pore structure and high surface area contribute to superior electrochemical properties.
- This work highlights the viability of using agricultural waste for producing advanced energy storage materials.
