Electrochemical Studies on Corncob Derived Activated Porous Carbon for Supercapacitors Application in Aqueous and Non-aqueous Electrolytes

Karnan, M.; Subramani, K.; Srividhya, P. K.

doi:10.1016/j.electacta.2017.01.095

Cited by 181 publications

(73 citation statements)

References 59 publications

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“…Figure 5(b) displays GCD profiles for HPC-0, HPC-5, HPC-10, and HPC-15 in a 6 M KOH solution, which features a non-linear characteristic indicative of pseudo-capacitance contribution. [46,47] The same behavior of shape retaining when the current density is varied from 0.5 A g À 1 to 20 A g À 1 is also observed for GCD test results of HPC-10 ( Figure 5(c)). The highest and the lowest specific capacitance of 404 and 150 F g À 1 is achieved in HPC-10 case at the lowest and the highest current density of 0.1 and 30 A g À 1 , respectively ( Figure 5(d)).…”

Section: Electrochemical Performancessupporting

confidence: 71%

“…Increasing scan rate of CV from 5 to 100 mV s −1 does not change the CV area shape (Figure S2(b)) as is the case in a 1 M H 2 SO 4 (Figure S2(a)). Figure (b) displays GCD profiles for HPC‐0, HPC‐5, HPC‐10, and HPC‐15 in a 6 M KOH solution, which features a non‐linear characteristic indicative of pseudo‐capacitance contribution . The same behavior of shape retaining when the current density is varied from 0.5 A g −1 to 20 A g −1 is also observed for GCD test results of HPC‐10 (Figure (c)).…”

Section: Resultsmentioning

confidence: 52%

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Characterization of Hierarchical Porous Carbons Made from Bean Curd via K₂CO₃ Activation as a Supercapacitor Electrode

Kong

et al. 2019

ChemElectroChem

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Progress in sustainable energy development often relies upon the idea of making use of green materials and agents to fabricate the components of high‐performance energy storage devices. Herein, we show that a relatively high energy density of 11.9 Wh kg−1 at a 0.1 A g−1 current density in a 1 M H2SO4 solution and a stable capacitance performance for up to 10000 cycles can be achieved in a symmetric supercapacitor (SC) made of two identical hierarchical porous carbon (HPC) electrodes derived from bean curd and 10 wt.% potassium carbonate (K2CO3); both of which are non‐toxic, edible materials. Such HPC, defined as HPC‐10, which was made through a one‐pot activation process followed by carbonization at 750 °C, exhibits high specific surface area of 2514 m2 g−1, hierarchical porous framework (i. e., simultaneous presence of abundant micropores, mesopores, and macropores), and contains N and O dopant components. In a three‐electrode system, HPC‐10 showed specific capacitances of 486 F g−1 in a 1 M H2SO4 and 404 F g−1 in a 6 M KOH, both obtained at a 0.1 A g−1 current density. This work also evaluates systematically the porous structure and electrochemical performance of HPC as a function of K2CO3 concentration from 0 wt.% to 15 wt.%.

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Section: Electrochemical Performancessupporting

confidence: 71%

Section: Resultsmentioning

confidence: 52%

Characterization of Hierarchical Porous Carbons Made from Bean Curd via K₂CO₃ Activation as a Supercapacitor Electrode

Kong

et al. 2019

ChemElectroChem

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“…The biomass derived activated carbon (AC) materials are attracting great attention due to their natural abundance and low cost, especially for corncob. As expected, some laudable works exploring corncob based carbon with optimizing microstructures has been reported in this regard . However, from the perspective of application, developing a novel and facile method is highly desirable.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Porous Activated Carbon Obtained by a Novel Heating‐Rate‐Induced Method for Lithium‐Ion Capacitor

Sun

Yang

et al. 2019

ChemistrySelect

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Lithium‐ion capacitor (LIC) is an advanced energy storage system due to the combination of high energy density and rapid charge–discharge capability. However, one of the challenges is to improve the specific capacitance and energy density of cathode at high power density. For activated carbon based cathode, the unique hierarchical porous structure and suitable graphitization are crucial for the improvement of the specific capacitance and energy density. Herein, a novel heating‐rate‐induced method is developed to prepare corncob‐derived activated carbons (C‐ACs) with high electrochemical performances. The as‐obtained C‐ACs possess large surface area (1154 m2 g−1), optimal hierarchical porous structure, and suitable graphitization. Particularly, optimal hierarchical porous structure contains not only the high energy storage of the micropores but also the high‐rate performance of the mesopores and macropores. The optimized C‐ACs‐8 electrode exhibits a specific capacitance of 158 F g−1 at 0.5 A g−1, exciting rate performance, and fast charge transfer capability. A lithium‐ion capacitor device based on C‐ACs‐8 cathode delivers a high energy density of 75 Wh kg−1 at power density of 562 W kg−1 and shows a long cycle life with 86.4% capacitance retention after 1000 cycles.

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“…Among the three electrodes, the CV profile of OPAA‐700 has shown good electrochemical response compared to OPAA‐600 and OPAA‐800 electrode. The CV profile shows a typical mirror image characteristics of rectangular shape due to the effective EDLC behaviour with faradaic humps for OPAA‐600 and OPAA‐700 electrode materials due to the pseudocapacitance influence from the hetero atom functionalities ,,,. However, the OPAA‐800 shows only EDLC response due to the reduction of functional groups at high‐temperature treatment.…”

Section: Resultsmentioning

confidence: 98%

Orange Peel Derived Activated Carbon for Fabrication of High‐Energy and High‐Rate Supercapacitors

et al. 2017

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Owing to our inevitable energy necessity, alternate energy resources have to be implemented in our energy storage systems to enervate the energy demands. On the consideration of the above statement, activated high surface area three‐dimensional (3D) nanoporous carbon derived from the orange peel bio‐waste has been studied for symmetric flexible and bendable solid state supercapacitor (SSC) with high energy density. The nitrogen adsorption/desorption isotherms revealed that the activated nano‐porous carbon exhibits a high specific surface area and average pore volume of 2160 m2/g and 0.779 cc/g with the uniform meso and microporous network. The fabricated symmetric cell using the activated porous carbon in aqueous electrolyte exhibits a high specific capacitance of 460 F/g at 1 A/g with an excellent electrochemical stability of 98% for 10000 cycles and virtuous rate performance at higher current densities. The fabricated aqueous symmetric device exhibits a high energy density and power density of 12 Wh/kg and 32.8 kW/kg, respectively. Similarly, the symmetric device in ionic liquid electrolyte shows a high cell voltage of 3 V and high energy and power density of 43 Wh/kg and 1185 W/kg, respectively. Also, fabricated all‐solid‐state flexible supercapacitor device exhibits a high energy and power density of 11.4 Wh/kg and 6.6 kW/kg, respectively. The flexible supercapacitor device was shown to light up a red light emitting diode (LED) for more than three minutes.

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Electrochemical Studies on Corncob Derived Activated Porous Carbon for Supercapacitors Application in Aqueous and Non-aqueous Electrolytes

Cited by 181 publications

References 59 publications

Characterization of Hierarchical Porous Carbons Made from Bean Curd via K₂CO₃ Activation as a Supercapacitor Electrode

Characterization of Hierarchical Porous Carbons Made from Bean Curd via K₂CO₃ Activation as a Supercapacitor Electrode

Hierarchical Porous Activated Carbon Obtained by a Novel Heating‐Rate‐Induced Method for Lithium‐Ion Capacitor

Orange Peel Derived Activated Carbon for Fabrication of High‐Energy and High‐Rate Supercapacitors

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Electrochemical Studies on Corncob Derived Activated Porous Carbon for Supercapacitors Application in Aqueous and Non-aqueous Electrolytes

Cited by 181 publications

References 59 publications

Characterization of Hierarchical Porous Carbons Made from Bean Curd via K2CO3 Activation as a Supercapacitor Electrode

Characterization of Hierarchical Porous Carbons Made from Bean Curd via K2CO3 Activation as a Supercapacitor Electrode

Hierarchical Porous Activated Carbon Obtained by a Novel Heating‐Rate‐Induced Method for Lithium‐Ion Capacitor

Orange Peel Derived Activated Carbon for Fabrication of High‐Energy and High‐Rate Supercapacitors

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Characterization of Hierarchical Porous Carbons Made from Bean Curd via K₂CO₃ Activation as a Supercapacitor Electrode

Characterization of Hierarchical Porous Carbons Made from Bean Curd via K₂CO₃ Activation as a Supercapacitor Electrode