The Effect of Binder in Electrode Materials for Capacitance Improvement and EDLC Binder-free Cell Design

2013 ◽  
Vol 16 (3) ◽  
pp. 197-202 ◽  
Author(s):  
R. López-Chavéz ◽  
A. K. Cuentas-Gallegos
Keyword(s):  
Polyvinylidene Fluoride ◽  
Electrode Materials ◽  
Active Material ◽  
Current Collector ◽  
Free Cell ◽  
Carbon Paper ◽  
Cell Design ◽  
Binder Type ◽  
Binder Free ◽  
Charge Discharge

In the present work we show results related with the influence of the binder type used to elaborate active electrodes made of activated carbon (DLC) for the assembly of supercapacitor cells. A Nafion 5%w solution and/or Kinar Flex (Polyvinylidene fluoride, PVDF) were used as binders at different concentrations, using DLC carbon as the active material to make the electrodes by aerography, and carbon paper as support and current collector. Thickness of the electrodes was controlled by the weight of active material (DLC carbon). Cyclic voltammetry technique was used to investigate the intrinsic capacitive nature of these electrodes, increasing this value from 120 F/g to 245 F/g at 20 mV/s just by improving the type and amount of binder, and the thickness of the electrode. Symmetric 2-electrode cells assembled with binder-free electrodes were electrochemically characterized by galvanostatic cycling, showing capacitance values of 38F/g and a stable behavior during 7000 charge-discharge cycles.

scholarly journals Electrochemical Properties of PANI as Single Electrode of Electrochemical Capacitors in Acid Electrolytes

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Haihua Zhu ◽  
Shunjin Peng ◽  
Weijie Jiang
Keyword(s):  
Electrochemical Properties ◽  
Chemical Structure ◽  
Active Material ◽  
Electrochemical Capacitor ◽  
Current Collector ◽  
Carbon Paper ◽  
Solution Polymerization ◽  
Chemical Solution ◽  
Galvanostatic Charge ◽  
Charge Discharge

The polyaniline (PANI) powder with globular sponge-like morphology was prepared by chemical solution polymerization, and its morphology and chemical structure were characterized by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR), respectively. The single electrode of electrochemical capacitor was made using the prepared PANI powder as active material and carbon paper as current collector. Electrochemical properties of PANI as a single electrode in 1 M HCl and 1 M H2SO4electrolyte solution were tested by galvanostatic charge/discharge (GCD) and cyclic voltammetry (CV) techniques. It has been found that PANI has higher specific capacitance of 302.43 Fg−1, higher specific energy of 54.44 Wh·kg−1at 0.5 Ag−1, and higher working potential in 1 M HCl than those in 1 M H2SO4.

scholarly journals Electrochemical Performance of Molybdenum Disulfide Supercapacitor Electrode in Potassium Hydroxide and Sodium Sulfate Electrolytes

2020 ◽  
Vol 8 (6) ◽  
pp. 5499-5503
Keyword(s):  
Molybdenum Disulfide ◽  
Active Material ◽  
Current Collector ◽  
Future Application ◽  
Energy Storage Materials ◽  
Discharge Process ◽  
Supercapacitor Electrode ◽  
Optical And Mechanical Properties ◽  
Interest In Research ◽  
Charge Discharge

Two-dimensional materials have attracted growing interest in research because of their specific electronic, physical, optical and mechanical properties. Molybdenum disulfide was theoretically investigated as novel energy storage materials because of its unusual physicochemical properties. This paper describes easy approach to fabricate molybdenum disulfide (MoS2 ) electrode using slurry technique on conducting substrate namely Ni foam as current collector for supercapacitor device application. This MoS2 electrode exhibits relatively good specific gravimetric capacitance, (Csp) of 11.12 to 12.38 Fg -1 at 1 mVs -1 scan rate. Moreover, galvanostatic charge-discharge displays symmetrical triangular curves which attributed to the fast charge-discharge process (in seconds). These results show that MoS2 active material can be charged and discharged reversibly between 0.2 and 1.0 V (in 6 M KOH) and between 0.3 and 1.0 V (in 0.5 M Na2SO4 ). From cyclic stability test exhibits capacitance retention of up to 83% and 64% after 1000 cycles in 6 M KOH and 0.5 M Na2SO4 , respectively. The MoS2 electrode is thus a promising material for future application of the supercapacitor.

scholarly journals Development of Binder Free Interconnected 3D Flower of NiZn2O4 as an Advanced Electrode Materials for Supercapacitor Applications

Crystals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 14
Author(s):  
Sajid Ali Ansari ◽  
Nazish Parveen ◽  
Mohd Al Saleh Al-Othoum ◽  
Mohammad Omaish Ansari
Keyword(s):  
Electron Microscopy ◽  
Energy Storage ◽  
Active Sites ◽  
Electrode Materials ◽  
Electrochemical Impedance ◽  
Nickel Foam ◽  
High Surface ◽  
Hydrothermal Process ◽  
Active Material ◽  
Binder Free

The design and development of electrode materials for energy-storage applications is an area of prime focus around the globe because of the shortage of natural resources. In this study, we developed a method for preparing a novel three-dimensional binder-free pseudocapacitive NiZn2O4 active material, which was grown directly over nickel foam (NiZn2O4@3D-NF), using a simple one-step hydrothermal process. The material was characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy techniques were employed to evaluate the pseudocapacitive performance of the NiZn2O4 active material in a three-electrode assembly cell. The prepared NiZn2O4@3D-NF electrode exhibited an excellent specific capacitance, of 1706.25 F/g, compared to that of the NiO@3D-NF (1050 F/g) electrode because it has the bimetallic characteristics of both zinc and nickel. The NiZn2O4@3D-NF electrode showed better cyclic stability (87.5% retention) compared to the NiO@3D-NF electrode (80% retention) after 5000 cycles at a fixed current density, which also supports the durability of the NiZn2O4@3D-NF electrode. The characteristics of NiZn2O4@3D-NF include corrosion resistance, high conductivity, an abundance of active sites for electrochemical reaction, a high surface area, and synergism between the bimetallic oxides, which make it a suitable candidate for potential application in the field of energy storage.

scholarly journals Binder-Free Centimeter-Long V2O5 Nanofibers on Carbon Cloth as Cathode Material for Zinc-Ion Batteries

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 31 ◽  
Author(s):  
Lyn Marie De Juan-Corpuz ◽  
Ryan Dula Corpuz ◽  
Anongnat Somwangthanaroj ◽  
Mai Thanh Nguyen ◽  
Tetsu Yonezawa ◽  
...  
Keyword(s):  
Cathode Material ◽  
Low Cost ◽  
Hydrothermal Process ◽  
Active Material ◽  
Current Collector ◽  
Zinc Ion ◽  
Carbon Cloth ◽  
One Step ◽  
Binder Free ◽  
Novel Strategy

Recently, rechargeable aqueous zinc-ion batteries (AZBs) have attracted extensive interest due to their safety, abundance, low cost, and low toxicity. However, aqueous electrolytes require a polymeric binder to prevent dissolution of the active material in addition to its binding properties. This study highlights binder-free, centimeter long, single-crystal, V2O5 nanofibers (BCS-VONF) on carbon cloth, as the cathode material for AZBs synthesized via a simple one-step hydrothermal process. BCS-VONF in 3.0 M Zn(OTf)2 exhibit promising electrochemical performance with excellent capacity retention. Even in the absence of a binder, BCS-VONF were found to be very stable in 3.0 M Zn(OTf)2. They will not yield to the dissolution and detachment of the active material on the current collector. The novel strategy described in this study is an essential step for the development of BCS-VONF on carbon cloth, as a promising cathode material for AZBs.

Reducing Side Reactions Using PF6-based Electrolytes in Multivalent Hybrid Cells

2015 ◽  
Vol 1773 ◽  
pp. 27-32 ◽  
Author(s):  
Danielle L. Proffit ◽  
Albert L. Lipson ◽  
Baofei Pan ◽  
Sang-Don Han ◽  
Timothy T. Fister ◽  
...  
Keyword(s):  
Electrode Materials ◽  
High Surface ◽  
Active Material ◽  
High Surface Area ◽  
Lithium Ion ◽  
Current Collector ◽  
Side Reactions ◽  
Hybrid Cells ◽  
Current Collectors ◽  
Carbon Anodes

ABSTRACTThe need for higher energy density batteries has spawned recent renewed interest in alternatives to lithium ion batteries, including multivalent chemistries that theoretically can provide twice the volumetric capacity if two electrons can be transferred per intercalating ion. Initial investigations of these chemistries have been limited to date by the lack of understanding of the compatibility between intercalation electrode materials, electrolytes, and current collectors. This work describes the utilization of hybrid cells to evaluate multivalent cathodes, consisting of high surface area carbon anodes and multivalent nonaqueous electrolytes that are compatible with oxide intercalation electrodes. In particular, electrolyte and current collector compatibility was investigated, and it was found that the carbon and active material play an important role in determining the compatibility of PF6-based multivalent electrolytes with carbon-based current collectors. Through the exploration of electrolytes that are compatible with the cathode, new cell chemistries and configurations can be developed, including a magnesium-ion battery with two intercalation host electrodes, which may expand the known Mg-based systems beyond the present state of the art sulfide-based cathodes with organohalide-magnesium based electrolytes.

scholarly journals Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0254023
Author(s):  
Shahrzad Arshadi Rastabi ◽  
Rasoul Sarraf-Mamoory ◽  
Ghadir Razaz ◽  
Nicklas Blomquist ◽  
Magnus Hummelgård ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Active Material ◽  
Current Collector ◽  
Graphite Substrate ◽  
Discharge Process ◽  
Graphite Foil ◽  
Current Densities ◽  
Flexible Graphite ◽  
Foil Substrate ◽  
Charge Discharge

The cycling performance of supercapacitors sometimes becomes limited when electrode materials slough off during frequent charge–discharge cycles, due to weak bonding between the active material and the current collector. In this work, a flexible graphite foil substrate was successfully used as the current collector for supercapacitor electrodes. Graphite foil substrates were treated in different ways with different acid concentrations and temperatures before being coated with an active material (NiMoO4/nanographite). The electrode treated with HNO3 (65%) and H2SO4 (95%) in a 1:1 ratio at 24°C gave better electrochemical performance than did electrodes treated in other ways. This electrode had capacitances of 441 and 184 Fg–1 at current densities of 0.5 and 10 Ag-1, respectively, with a good rate capability over the current densities of the other treated electrodes. SEM observation of the electrodes revealed that NiMoO4 with a morphology of nanorods 100–120 nm long was properly accommodated on the graphite surface during the charge–discharge process. It also showed that treatment with high-concentration acid created an appropriately porous and rough surface on the graphite, enhancing the adhesion of NiMoO4/nanographite and boosting the electrochemical performance.

scholarly journals Meso Carbon Micro Bead (MCMB) Based Graphitized Carbon for Negative Electrode in Lithium Ion Battery

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Fadli Rohman
Keyword(s):  
Lithium Ion Battery ◽  
Polyvinylidene Fluoride ◽  
Active Material ◽  
Lithium Ion ◽  
Crystal Phase ◽  
Cyclic Voltammograms ◽  
Full Cell ◽  
Graphitized Carbon ◽  
Charge Discharge ◽  
Discharge Test

Lithium ion battery performance of graphitized Meso Carbon Micro Beads (MCMB) as an anode material was investigated in full cell battery system containing LiCoO<sub>2</sub> cathode, PE separator and LiPF<sub>6</sub> electrolyte. The commercial MCMB, which was fabricated by Linyi<sup>TM</sup>, was sintered at 500⁰C for five hour to make graphitized MCMB.  The microstructure of graphitized MCMB was characterized using XRD and SEM to show the crystalinity, crystal phase and morphology of the MCMB particle. The result indicated that the crystal phase of the sample was changed into graphitized carbon .The electrode was made using coating method. We used copper foil as the substrate for anode. The anode materials consist of graphitized MCMB (active material), Polyvinylidene fluoride/PVDF (binder) and acetylene black (additive material). Full cell battery was tested using charge-discharge and cyclic voltammetry (CV) methods. From the CV characterization, cyclic voltammograms of the cell show characteristic lithium intercalation through reduction-oxidation peak. Charge-discharge test showed the discharge and charge capacity of the cells. According charge discharge test, commercial MCMB was better that graphitized MCMB.

scholarly journals Graphene/Carbon Paper Combined with Redox Active Electrolyte for Supercapacitors with High Performance

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1355
Author(s):  
Yanlin Xia ◽  
Youtian Mo ◽  
Wei Meng ◽  
Xusheng Du ◽  
Chuanguo Ma
Keyword(s):  
Filter Paper ◽  
High Performance ◽  
Electrode Materials ◽  
Carbon Paper ◽  
Free Standing ◽  
Redox Active ◽  
Binder Free ◽  
Good Cycling Stability ◽  
Cellulose Filter ◽  
Modified Cellulose

Graphene/carbon paper is prepared by pyrolyzing graphene modified cellulose filter paper and directly used as a binder-free electrode to assemble a supercapacitor (SC) with a redox active electrolyte, containing a Fe3+/Fe2+ additive. By the graphene incorporation and the carbonization of the cellulose fibers, both the microstructure and the electrical conductivity of the carbon paper are promoted greatly. The filter paper derived carbon (FPC) electrode exhibits a specific capacitance (Cs) of 2832 F·g−1 in a 1 M H2SO4 + 0.5 M Fe3+/Fe2+ electrolyte at 1 A·g−1, which is about 81 times that in a normal H2SO4 electrolyte. With the modification of graphene, the capacitive performance of the SC is enhanced further and a remarkable Cs of 3396 F·g−1 at 1 A·g−1 is achieved for a graphene modified filter paper carbon (GFPC) electrode, which remains at ~632 F·g−1 at 10 A·g−1. The free standing GFPC electrode also exhibits good cycling stability (93.8% of capacitance retention after 2000 cycles) and an energy density of 118 Wh·kg−1 at a power density of 500.35 W·kg−1, all of which are much higher than those of FPC. These encouraging results suggest that the graphene modification of electrode materials combined with a Fe3+/Fe2+ redox active electrolyte is a prospective measure to fabricate SC with an ultrahigh performance.

High-Rate Charge-Discharge Performance of Composite Materials of β-FeOOH Particles and Carbon Powder Prepared in the Presence of Ti(IV) Ions

2006 ◽  
Vol 320 ◽  
pp. 215-218
Author(s):  
Hideyuki Morimoto ◽  
Kazuhiko Takeno ◽  
Yuuki Uozumi ◽  
Kenichi Sugimoto ◽  
Shinichi Tobishima
Keyword(s):  
Composite Materials ◽  
Electrode Materials ◽  
Active Material ◽  
High Rate ◽  
Cycle Performance ◽  
Carbon Powder ◽  
Energy Storage Devices ◽  
Discharge Current Density ◽  
Discharge Performance ◽  
Charge Discharge

Composite materials of β-FeOOH particles and carbon powder were prepared by hydrolyzing of FeCl3+Ti(SO4)2 (aq.) in which carbon powder was dispersed. β-FeOOH formed in the presence of Ti(IV) ions became amorphous and/or low crystallinity. The composite materials prepared in the presence of Ti(IV) ions worked as lithium intercalation electrodes in nonaqueous electrolytes including lithium ions. The electrodes exhibited a good cycle performance at large charge-discharge current density over 5 mA cm-2 ( 4 A g-1 per weight of active material). The composite materials are one of the promising candidates as electrode materials for energy storage devices, such as hybrid electrochemical supercapacitor, that require high-power operations.

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