Wood-based activated carbons for supercapacitors with organic electrolyte
-
Galina Dobele
,
Aleksandrs Volperts
Abstract
The thermocatalytical synthesis conditions required for the activation of wood charcoal with NaOH in terms of the formation of pores in its structure were investigated. The present study was conducted to explore the potential application of activated carbons as electrodes in supercapacitors with organic electrolyte. The total pore volume and micro- and mesopore ratio were controlled by the activation temperature and alkali addition rate. The working characteristics of carbon electrodes (e.g., specific capacity and ohmic losses) in supercapacitors are strongly influenced by the properties of the pores in their structures. Herein, the optimal ratio of raw material to activator and activation temperature are established: an increase in the ratio of NaOH to carbonizate rate by a factor of 2 and setting the synthesis temperature at 700°C positively influence the electrochemical characteristics of supercapacitors and provide them with specific capacities of up to 160 F g-1.
Acknowledgments
This research was supported by ERAF 2014/0045/2DP/2.1.1.1.0/14/APIA/VIAA/50 and Latvian Science Council Grant No 666/2014.
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©2015 by De Gruyter
Artikel in diesem Heft
- Frontmatter
- Effect of hydroxide and sulfite ion concentration in alkaline sulfite anthraquinone (ASA) pulping – a comparative study
- Novel insight in carbohydrate degradation during alkaline treatment
- Activated hydrogen peroxide decolorization of a model azo dye-colored pulp
- Effects of inorganic salts on the degradation of 2,5-dihydroxy-[1,4]-benzoquinone as a key chromophore in pulps by hydrogen peroxide under basic conditions
- Analysis of degradation products in rayon spinning baths
- Effect of cellulase-assisted refining on the thermal degradation of bleached high-density paper
- Synthesis and characterization of functionalized 4-O-methylglucuronoxylan derivatives
- Hydrophobic materials based on cotton linter cellulose and an epoxy-activated polyester derived from a suberin monomer
- Depolymerization of cellulose during cold acidic chlorite treatment
- Enhanced stability of PVA electrospun fibers in water by adding cellulose nanocrystals
- Micro-nanoparticle gels obtained from bark for their use alone and with chitosan and Na-CMC in paper coatings
- Conversion of sulfur-free black liquor into fuel gas by supercritical water gasification
- Modification of acid hydrolysis lignin for value-added applications by micronization followed by hydrothermal alkaline treatment
- Preparation of lignin-containing porous microspheres through the copolymerization of lignin acrylate derivatives with styrene and divinylbenzene
- Wood-based activated carbons for supercapacitors with organic electrolyte
- Functionality and physico-chemical characteristics of wheat straw lignin, Biolignin™, derivatives formed in the oxypropylation process
- Antioxidant activity of various lignins and lignin-related phenylpropanoid units with high and low molecular weight
- Characterization of technical lignins by NMR spectroscopy: optimization of functional group analysis by 31P NMR spectroscopy
- Chemical composition of volatiles extracted from indigenous tree species of Uganda: composition of bark extracts from Psorospermum febrifugum and Milicia excelsa
Artikel in diesem Heft
- Frontmatter
- Effect of hydroxide and sulfite ion concentration in alkaline sulfite anthraquinone (ASA) pulping – a comparative study
- Novel insight in carbohydrate degradation during alkaline treatment
- Activated hydrogen peroxide decolorization of a model azo dye-colored pulp
- Effects of inorganic salts on the degradation of 2,5-dihydroxy-[1,4]-benzoquinone as a key chromophore in pulps by hydrogen peroxide under basic conditions
- Analysis of degradation products in rayon spinning baths
- Effect of cellulase-assisted refining on the thermal degradation of bleached high-density paper
- Synthesis and characterization of functionalized 4-O-methylglucuronoxylan derivatives
- Hydrophobic materials based on cotton linter cellulose and an epoxy-activated polyester derived from a suberin monomer
- Depolymerization of cellulose during cold acidic chlorite treatment
- Enhanced stability of PVA electrospun fibers in water by adding cellulose nanocrystals
- Micro-nanoparticle gels obtained from bark for their use alone and with chitosan and Na-CMC in paper coatings
- Conversion of sulfur-free black liquor into fuel gas by supercritical water gasification
- Modification of acid hydrolysis lignin for value-added applications by micronization followed by hydrothermal alkaline treatment
- Preparation of lignin-containing porous microspheres through the copolymerization of lignin acrylate derivatives with styrene and divinylbenzene
- Wood-based activated carbons for supercapacitors with organic electrolyte
- Functionality and physico-chemical characteristics of wheat straw lignin, Biolignin™, derivatives formed in the oxypropylation process
- Antioxidant activity of various lignins and lignin-related phenylpropanoid units with high and low molecular weight
- Characterization of technical lignins by NMR spectroscopy: optimization of functional group analysis by 31P NMR spectroscopy
- Chemical composition of volatiles extracted from indigenous tree species of Uganda: composition of bark extracts from Psorospermum febrifugum and Milicia excelsa
