Coconut kernel-derived activated carbon as electrode material for electrical double-layer capacitors

Kishore, Brij; Duraisamy, Shanmughasundaram; Penki, Tirupathi Rao; Munichandraiah, N.

doi:10.1007/s10800-014-0708-9

Cited by 54 publications

(20 citation statements)

References 45 publications

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“…It retained a capacitance of 114 F g -1 (12.8 lF cm -2 ) at a higher current density of 30 A g -1 . The results are higher than those for the reported carbon materials templated such as mesoporous-activated carbon spheres(204 F g -1 at 0.5 A g -1 ) [34], coconut kernel-derived activated carbon (173 F g -1 at 0.25 A g -1 ) [35], template carbon materials(180 F g -1 at 0.625 A g -1 ) [36], and ZIF-derived porous carbon (228 F g -1 at 0.1 A g -1 ). [37] The electrochemical long-term cyclic stability of the highly mesoporous carbons and their repeatability was investigated by GCD measurement.…”

Section: Electrochemical Measurements In 6 M Kohcontrasting

confidence: 57%

Structure and electrochemical performance of highly porous carbons by single-step potassium humate carbonization for application in supercapacitors

et al. 2015

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This paper presents the direct synthesis of highly porous carbons via the carbonization of potassium humate in inert atmosphere without any activation. Carbonization temperature is important for carbon structures and their electrochemical performance in electric doublelayer capacitors. The CK800 material derived from potassium humate has a high-specific surface area of 890 m 2 g -1 and an ideal average pore size of 2.56 nm. The CK800 material can also deliver a high-specific capacitance of 232 F g -1 (26.1 lF cm -2 ) at a constant charge/ discharge current of 0.5 A g -1 . This capacitance is maintained at a value of 114 F g -1 (12.8 lF cm -2 ) at 30 A g -1 . This material also has good cycle stability with over 93.5 % capacitance retention after 5000 cycles when measured in a three-electrode system using 6 M KOH as electrolyte. In this study, the CK800 material is tested in a three-electrode system using 1 M NaHCO 3 as electrolyte. Operational voltage in 1 M NaHCO 3 aqueous solution could be extended up to 1.3 V.

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Section: Electrochemical Measurements In 6 M Kohcontrasting

confidence: 57%

Structure and electrochemical performance of highly porous carbons by single-step potassium humate carbonization for application in supercapacitors

et al. 2015

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“…They reported a high specific capacitance of up to 242 F/g (0.3 A/g, 6 M KOH) in a two-electrode system, maintaining a high retention rate. Kishore et al [136] recently developed carbonized milk-free coconut kernel pulp at low temperatures. They found that the surface area decreases with increasing temperature; at 600 • C, they observed a surface area of 1200 m 2 /g.…”

Section: Carbon From Bio-wastes As An Excellent Materials For Edlcmentioning

confidence: 99%

Supercapacitor Energy Storage Device Using Biowastes: A Sustainable Approach to Green Energy

et al. 2019

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The demand for renewable energy sources worldwide has gained tremendous research attention over the past decades. Technologies such as wind and solar have been widely researched and reported in the literature. However, economical use of these technologies has not been widespread due partly to cost and the inability for service during of-source periods. To make these technologies more competitive, research into energy storage systems has intensified over the last few decades. The idea is to devise an energy storage system that allows for storage of electricity during lean hours at a relatively cheaper value and delivery later. Energy storage and delivery technologies such as supercapacitors can store and deliver energy at a very fast rate, offering high current in a short duration. The past decade has witnessed a rapid growth in research and development in supercapacitor technology. Several electrochemical properties of the electrode material and electrolyte have been reported in the literature. Supercapacitor electrode materials such as carbon and carbon-based materials have received increasing attention because of their high specific surface area, good electrical conductivity and excellent stability in harsh environments etc. In recent years, there has been an increasing interest in biomass-derived activated carbons as an electrode material for supercapacitor applications. The development of an alternative supercapacitor electrode material from biowaste serves two main purposes: (1) It helps with waste disposal; converting waste to a useful product, and (2) it provides an economic argument for the substantiality of supercapacitor technology. This article reviews recent developments in carbon and carbon-based materials derived from biowaste for supercapacitor technology. A comparison between the various storage mechanisms and electrochemical performance of electrodes derived from biowaste is presented.Sustainability 2019, 11, 414 2 of 22 renewable energy sources such as solar energy, geothermal energy, wind energy, biofuels, etc., while electrochemical energy storage devices such as supercapacitors, rechargeable batteries, etc. have also attracted significant research [9][10][11]. It is not an overstatement to say that successful development of any renewable energy source (e.g., windmills and solar cells), hybrid and electric vehicles and smart grids depend significantly upon the availability of a suitable energy storage system. A considerable amount of literature has been published on the use of supercapacitors as a viable storage device for renewable energy. Over 20,000 articles, books etc. were published in 2017, a higher number of research work is projected for 2018 (data from google scholar). There has been a geometric increase in the research published since the year 2000. Since supercapacitors were first experimented in 1957 by engineers at General Electric, they have found commercial applications in portable electronics, transportation and aerospace industry [12,13]. These applications of supercapacitors ...

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“…The use of nitrogencontaining carbon precursors appears to be more desirable because it avoids the use of post-treatments and guarantees a uniform distribution of nitrogen atoms in the bulk of the material [17]. The preparation of ACs from various N-enriched carbon precursors, including polymers, as well as their electrochemical behavior, has been previously reported [18][19][20][21][22][23]. In addition, good correlations between capacitance and nitrogen content have been observed [7].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-containing chitosan-based carbon as an electrode material for high-performance supercapacitors

et al. 2016

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Nitrogen-containing activated carbons were prepared from chitosan, a widely available and inexpensive biopolysaccharide, by a simple procedure and tested as electrode material in supercapacitors. The physical activation of chitosan chars with CO 2 led to carbons with a very high nitrogen content (up to 5.4 wt%) and moderate surface areas (1000-1100 m 2 g -1 ). Only chitosan-based activated carbons with a similar microporous structure were considered in this study to evaluate the effect of the nitrogen content and distribution on their electrochemical performance. The N-containing activated carbons were tested in two-and three-electrode supercapacitors using an aqueous electrolyte (1 M H 2 SO 4 ), and they exhibited superior surface capacitance (19.5 lF cm -2 ) and pseudocapacitance compared to a commercial activated carbon with a negligible nitrogen content and similar microporosity. The low oxygen content and the presence of stable quaternary nitrogen improved the charge propagation on the chitosan-based carbons, which was confirmed by the high capacity retention of 83 %. The chitosan-based carbons exhibited excellent cyclic stability and maintained 100 % of their capacitance after 5000 charge/discharge cycles at a current density of 1 A g -1 . These results demonstrate the suitability of chitosan-based carbons for application in energy storage systems.Electronic supplementary material The online version of this article

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Coconut kernel-derived activated carbon as electrode material for electrical double-layer capacitors

Cited by 54 publications

References 45 publications

Structure and electrochemical performance of highly porous carbons by single-step potassium humate carbonization for application in supercapacitors

Structure and electrochemical performance of highly porous carbons by single-step potassium humate carbonization for application in supercapacitors

Supercapacitor Energy Storage Device Using Biowastes: A Sustainable Approach to Green Energy

Nitrogen-containing chitosan-based carbon as an electrode material for high-performance supercapacitors

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