Activated carbon-Polyaniline composite active material slurry electrode for high capacitance, improved rheological performance electrochemical flow capacitor

2020 ◽  
Vol 354 ◽  
pp. 136719
Author(s):  
Pushpendra Singh ◽  
Kaushik Pal
Keyword(s):  
Activated Carbon ◽  
Active Material ◽  
High Capacitance ◽  
Rheological Performance

Preparation of Activated Carbon Derived from Water Hyacinth as Electrode Active Material for Li-Ion Supercapacitor

2020 ◽  
Vol 1000 ◽  
pp. 50-57
Author(s):  
Jagad Paduraksa ◽  
Muhammad Luthfi ◽  
Ariono Verdianto ◽  
Achmad Subhan ◽  
Wahyu Bambang Widayatno ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Water Hyacinth ◽  
Electrode Materials ◽  
Storage System ◽  
Active Material ◽  
Lithium Ion ◽  
High Energy ◽  
Specific Power ◽  
Full Cell ◽  
Lithium Ion Capacitor

Lithium-Ion Capacitor (LIC) has shown promising performance to meet the needs of high energy and power-density-energy storage system in the era of electric vehicles nowadays. The development of electrode materials and electrolytes in recent years has improvised LIC performance significantly. One of the active materials of LIC electrodes, activated carbon (AC), can be synthesized from various biomass, one of which is the water hyacinth. Its abundant availability and low utilization make the water hyacinth as a promising activated carbon source. To observe the most optimal physical properties of AC, this study also compares various activation temperatures. In this study, full cell LIC was fabricated using LTO based anode, and water hyacinth derived AC as the cathode. The LIC full cell was further characterized to see the material properties and electrochemical performance. Water hyacinth derived LIC can achieve a specific capacitance of 32.11 F/g, the specific energy of 17.83 Wh/kg, and a specific power of 160.53 W/kg.

scholarly journals Preparation and Capacitive Behavior of Dandelion-Likeγ-MnO2Nanofibre/Activated Carbon Microbeads Composite for the Application of Supercapacitor

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Li Bai ◽  
Xianyou Wang ◽  
Xingyan Wang ◽  
Xiaoyan Zhang ◽  
Wanmei Long ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Active Material ◽  
Transfer Reactions ◽  
X Ray Diffraction ◽  
Electrochemical Behaviors ◽  
X Ray ◽  
Layer Effect ◽  
Charge Transfer Reactions ◽  
In Situ Coating

Dandelion-likeγ-manganese dioxide (γ-MnO2) nanofibre/activated carbon microbeads (ACMBs) composite is prepared by an in situ coating technique. The structure and morphology of the composite are characterized by scanning electron microscopy and X-ray diffraction. The results show thatγ-MnO2nanofibre is uniformly encapsulated on the surface of ACMB, and the composite finally becomes a dandelion-like microbead. Cyclic voltammetry, galvanostatic current charge/discharge, and cycle life measurements are used to evaluate the electrochemical behaviors of the composite. Since the composite is able to undergo pseudofaradic charge transfer reactions and hereto contributes together with the double-layer effect to the total capacitance of the material, the specific capacitance of the composite is as high as 375.9 F g-1at a scan rate of 1 mV s-1, which is significantly higher than the pure ACMB. Besides, the capacitance retention of the supercapacitor using the composite as electrode-active material keeps still 93% after 1000 cycles.

scholarly journals LiOH/Coconut Shell Activated Carbon Ratio Effect on the Electrical Conductivity of Lithium Ion Battery Anode Active Material

Molekul ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 235
Author(s):  
Annisa Syifaurrahma ◽  
Arnelli Arnelli ◽  
Yayuk Astuti
Keyword(s):  
Electrical Conductivity ◽  
Activated Carbon ◽  
Lithium Ion Battery ◽  
Surface Area ◽  
Active Material ◽  
Lithium Ion ◽  
Coconut Shell ◽  
Coconut Shell Activated Carbon ◽  
Anode Active Material ◽  
Battery Anode

A lithium ion battery anode active material comprised of LiOH (Li) and coconut shell activated carbon (AC) has been synthesized with Li/AC ratios of (w/w) 1/1, 2/1, 3/1, and 4/1 through the sol gel method. The present study aims to ascertain the best Li/AC ratio that produces an anode active material with the best electrical conductivity value and determine the characteristics of the anode active material in terms of functional groups, surface area, crystallinity, and capacity. Based on the electrical conductivity test using LCR, the active material Li/AC 2/1 had the highest electrical conductivity with a value of 2.064x10-3 Sm-1. The conductivity achieved was slightly smaller than that of the active material with no addition of LiOH on the activated carbon at an electrical conductivity of 5.434x10-3 Sm-1. The FTIR spectra of the activated carbon and Li/AC 2/1 showed differences with in the Li-O-C group absorption at 1075 cm-1 wavenumber and the wide absorption in the area of 547.5 cm-1 that represents Li-O vibration. Based on the results of SAA, the activated carbon had a larger surface area than Li/AC 2/1 at 17.057 m2g-1 and 5.615 m2g-1, respectively. The crystallinity of both active materials was low shown by the widening of the diffraction peaks. Tests with cyclic voltammetry (CV) proved that there was a reduction-oxidation reaction for the two samples in the first cycle with a large charge and discharge capacities of the activated carbon of 150.989 mAh and 92.040 mAh, while for Li/AC 2/1 they were 91.103 mAh and 47.580 mAh.

Activated carbon with high capacitance prepared by NaOH activation for supercapacitors

2010 ◽  
Vol 124 (1) ◽  
pp. 504-509 ◽  
Author(s):  
Bin Xu ◽  
Yufeng Chen ◽  
Gang Wei ◽  
Gaoping Cao ◽  
Hao Zhang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
High Capacitance

scholarly journals Design and synthesis of graphene/activated carbon/polypyrrole flexible supercapacitor electrodes

RSC Advances ◽  
2017 ◽  
Vol 7 (50) ◽  
pp. 31342-31351 ◽  
Author(s):  
Lanshu Xu ◽  
Mengying Jia ◽  
Yue Li ◽  
Shifeng Zhang ◽  
Xiaojuan Jin
Keyword(s):  
Activated Carbon ◽  
Active Material ◽  
Constant Current ◽  
Ternary Composite ◽  
Vacuum Filtration ◽  
Design And Synthesis ◽  
Flexible Supercapacitor

A ternary composite of graphene/activated carbon/polypyrrole (GN/AC/PPy) used as an electrode active material for supercapacitors has been synthesized via vacuum filtration and anodic constant current deposition methods.

Design of new activated carbon based adsorbents for improved desulfurization of heavy gas oil: experiments and kinetic modeling

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Amer T. Nawaf ◽  
Aysar T. Jarullah ◽  
Shymaa A. Hameed ◽  
Iqbal M. Mujtaba
Keyword(s):  
Activated Carbon ◽  
Kinetic Model ◽  
Ultrasonic Method ◽  
Linear Regression Analysis ◽  
Active Material ◽  
Sulfur Removal ◽  
Potassium Phosphate ◽  
Operating Conditions ◽  
Impregnation Method ◽  
Adsorption Desulfurization

Abstract In this work, adsorption desulfurization is considered for making cleaner fuel. New efficient adsorbents have been designed by using two active metal oxides mainly potassium permanganate (KMnO4) and potassium phosphate (KPO4·3H2O) on Activated Carbon (AC). Ultrasonic assisted impregnation method (IWI) is used in designing the adsorbents offering high pore volume, pore size, surface chemistry, and high surface area. Use of ultrasonic method increases the dispersion of the active material (groups) on AC leading to increased number of collisions between O-atom on AC-support resulting in high sulfur removal from fuel. KMnO4 on AC shows higher adsorption capacity towards sulfur than KPO4·3H2O at the same operating conditions. New results with respect to sulfur removal has obtained compared with those obtained by previous studies. Finally, the adsorption kinetic parameters of such process are developed. Thomas and Yoon–Nelson models and the experimental data are used for this purpose using linear and non-linear regression analysis. Yoon–Nelson kinetic model fits well with the experiments data better than Thomas kinetic model in the entire adsorption column system.

The Effect of KOH Activator Concentration upon the Characteristics of Biomass-Derived Water Hyacinth Process on Lithium-Ion Capacitor

2020 ◽  
Vol 1000 ◽  
pp. 58-66
Author(s):  
Muhammad Luthfi ◽  
Jagad Paduraksa ◽  
Ariono Verdianto ◽  
Yoyok Dwi Setyo Pambudi ◽  
Bambang Priyono ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Water Hyacinth ◽  
Active Material ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Specific Power ◽  
Storage Device ◽  
Activation Process ◽  
Lithium Ion Capacitor

Lithium-ion capacitors (LIC) is believed to be an ideal option in certain application as energy storage device due to its properties either possessing high energy density (four times higher than electrical double-layer capacitor) or having as much power density as a supercapacitor. In this study, a biomass-based activated carbon (WHAC) was prepared by using the water hyacinth plant through the activation process utilizing a chemical activating agent, KOH. The water hyacinth was carbonized at 500 °C for a 1 h holding time with a ramping temperature of 10 °C/min. Then, the LICs electrode is constructed by two different types of electrode, WHAC as the main active material of cathode and lithium titanate oxide (LTO) for the anode. The biomass-derived activated carbon exhibits a high specific surface area of 791.8 m2/g and a high pore volume of 1.13 m3/g. The assembled LiCs shows a reasonable electrochemical performance with a maximum specific capacitance of 1.12 F/g with the highest specific energy of 4.48 Wh/kg and specific power of 34.14 W/kg. This LIC cell is one of the promising candidates for future applications due to its low-cost materials and owns more advantages than typical Lithium-ion Batteries (LIBs).

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