A dual‐activation strategy to tailor the hierarchical porous structure of biomass‐derived carbon for ultrahigh rate supercapacitor
- 3 February 2021
- journal article
- research article
- Published by Hindawi Limited in International Journal of Energy Research
- Vol. 45 (6), 9284-9294
- https://doi.org/10.1002/er.6458
Abstract
Suffering from the competitive relationship between the abundant electrochemically active sites and the fast ion transfer channel, it still faces tremendous challenges in simultaneously designing and preparing biomass-derived carbons with excellent capacitive and rate performance. Herein, a dual-activation strategy of KOH and KMnO4 is used to prepare cotton stalks-derived porous carbon with large specific surface area (SSA) (1634 m(2) g(-1)), interconnected network structure, as well as rational mesopores and micropore ratio. Consequently, the obtained sample exhibits an ultrahigh specific capacitance of 318 F g(-1) at 1 A g(-1), 71% capacitance retention at current density up to 50 A g(-1), and only 2% capacitance dissipation in a two-electrode system in 6 M KOH after 10 000 cycles. Importantly, the obtained sample also shows a high areal capacitance of 3.8 F cm(-2) under a high mass loading of 16 mg cm(-2). Moreover, the obtained sample also delivers a high energy density of 19.9 Wh kg(-1) at 397 W kg(-1) in the symmetric two-electrode system using 1 M Na2SO4 aqueous electrolyte. This work provides an alternative avenue for the facile and scaled-up conversion of earth-abundant agricultural wastes into advanced carbon materials for supercapacitors application.Keywords
Funding Information
- National Natural Science Foundation of China (U1703251, 21671166)
- Natural Science Foundation of Xinjiang Province (2020D01C076)
This publication has 63 references indexed in Scilit:
- Porous activated carbon monolith with nanosheet/nanofiber structure derived from the green stem of cassava for supercapacitor applicationInternational Journal of Energy Research, 2020
- Application of Plant-Based Porous Carbon for SupercapacitorsActa Physico Chimica Sinica, 2020
- Porous Carbons Derived from Collagen‐Enriched Biomass: Tailored Design, Synthesis, and Application in Electrochemical Energy Storage and ConversionAdvanced Functional Materials, 2019
- Kinetics Enhanced Nitrogen‐Doped Hierarchical Porous Hollow Carbon Spheres Boosting Advanced Potassium‐Ion Hybrid CapacitorsAdvanced Functional Materials, 2019
- Recent Progress in Biomass‐Derived Electrode Materials for High Volumetric Performance SupercapacitorsAdvanced Energy Materials, 2018
- Electrochemical capacitors: mechanism, materials, systems, characterization and applicationsChemical Society Reviews, 2016
- Inherent N,O-containing carbon frameworks as electrode materials for high-performance supercapacitorsNanoscale, 2016
- Biomass-derived carbon: synthesis and applications in energy storage and conversionGreen Chemistry, 2016
- A review of electrolyte materials and compositions for electrochemical supercapacitorsChemical Society Reviews, 2015
- Hierarchical Porous Nitrogen-Doped Carbon Nanosheets Derived from Silk for Ultrahigh-Capacity Battery Anodes and SupercapacitorsACS Nano, 2015