scholarly journals Evaluation of the Stability of Carbon Conductor in the Cathode of Aqueous Rechargeable Lithium Batteries against Overcharging

Batteries ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 59
Author(s):  
The Nam Long Doan ◽  
Tuan K. A. Hoang ◽  
Sameh M. I. Saad ◽  
P. Chen
Keyword(s):  
Lithium Batteries ◽  
Polyvinylidene Fluoride ◽  
Active Material ◽  
Rechargeable Lithium Batteries ◽  
Spherical Carbon ◽  
Conductive Additive ◽  
Full State ◽  
The Stability ◽  
The Right ◽  
Carbon Component

Three major components in a cathode of aqueous rechargeable lithium batteries are the active material, the polymer binder, and the carbon conductive additive. The stability of each component in the battery is the key to long service life. To evaluate the stability of the carbon component, we introduce here a quick and direct testing method. LiMn2O4 is chosen as a typical active material for the preparation of the cathode, with polyvinylidene fluoride (PVdF), and a commercial carbon, which is chosen among Acetylene black, superP, superP-Li, Ketjen black 1, Ketjen black 2, Graphite, KS-6, splintered glassy carbon, and splintered spherical carbon. This method reveals the correlation between the electrochemical stability of a carbon and its physical and structural properties. This helps researchers choose the right carbon component for a Li-ion cathode if they want the battery to be robust, especially at near full state of charge.

Sulfides organic polymer: Novel cathode active material for rechargeable lithium batteries

2007 ◽  
Vol 168 (1) ◽  
pp. 278-281 ◽  
Author(s):  
Jing Yu Zhang ◽  
Ling Bo Kong ◽  
Li Zhi Zhan ◽  
Jing Tang ◽  
Hui Zhan ◽  
...  
Keyword(s):  
Lithium Batteries ◽  
Active Material ◽  
Organic Polymer ◽  
Rechargeable Lithium Batteries

Effect of LiFePO4 Cathode Thickness on Lithium Battery Performance

2015 ◽  
Vol 827 ◽  
pp. 146-150
Author(s):  
Ariska Rinda Adityarini ◽  
Eka Yoga Ramadhan ◽  
Endah Retno Dyartanti ◽  
Agus Purwanto
Keyword(s):  
Lithium Ion Battery ◽  
Polyvinylidene Fluoride ◽  
Lithium Battery ◽  
Lithium Iron Phosphate ◽  
Active Material ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Structure Characterization ◽  
Cathode Layer ◽  
Conductive Additive

Lithium ion battery is composed of three main parts, i.e. cathode, anode and electrolyte. In this work, we investigated the effect of LiFePO4 cathode composite’s thickness on performances of lithium battery. LiFePO4 cathode was prepared in a slurry that consisted of lithium iron phosphate (LiFePO4) powder as active material, acetylene black as conductive additive, polyvinylidene fluoride (PVDF) as binder, and N-methyl-2-pyrrolidone (NMP) as solvent. The slurry was then deposited on the aluminum substrate using doctor blade method in different thickness. The cathode layers were deposited with the thickness of 150, 200, 250 & 300 μm. The structure characterization of the material was analyzed by XRD, while the material’s morphology was analyzed by Scanning Electron Microscope (SEM). Performances of lithium ion battery with LiFePO4 cathode were evaluated using charge-discharge cycle test. It is found that battery made of cathode layer with 250 μm thickness shows the best performances.

scholarly journals Polymer Binders for the Electrodes of Lithium Batteries Part 1. Polyvinylidene Fluoride, its Derivatives and other Commercialized Materials

2020 ◽  
Vol 20 (3) ◽  
pp. 115-131
Author(s):  
Aigul S. Istomina ◽  
◽  
Olga V. Bushkova ◽  
Keyword(s):  
Lithium Batteries ◽  
Polyvinylidene Fluoride ◽  
Active Material ◽  
Composite Electrodes ◽  
Natural Polymers ◽  
Power Characteristics ◽  
Polymer Binders ◽  
Wide Range ◽  
Synthetic And Natural Polymers ◽  
Selection Of

The current situation in technology and developments in the field of polymer binders for composite electrodes of lithium electrochemical systems are discussed. A wide range of synthetic and natural polymers used for this purpose is considered. Emphasis is placed on commercially available materials, which form aqueous solutions or dispersions. The advantages of multifunctional polymer binders are demonstrated. The need for individual selection of a binder for a given active material to achieve and maintain high capacitive and power characteristics of the batteries, as well as to ensure their longterm safe cycling, is shown.

Symmetrizable Difference Dchemes

2005 ◽  
Vol 5 (1) ◽  
pp. 3-50 ◽  
Author(s):  
Alexei A. Gulin
Keyword(s):  
Initial Data ◽  
Difference Scheme ◽  
Difference Schemes ◽  
Time Dependent ◽  
Stability Boundaries ◽  
Typical Representative ◽  
Variable Weight ◽  
The Stability ◽  
Conditions Of Stability ◽  
The Right

AbstractA review of the stability theory of symmetrizable time-dependent difference schemes is represented. The notion of the operator-difference scheme is introduced and general ideas about stability in the sense of the initial data and in the sense of the right hand side are formulated. Further, the so-called symmetrizable difference schemes are considered in detail for which we manage to formulate the unimprovable necessary and su±cient conditions of stability in the sense of the initial data. The schemes with variable weight multipliers are a typical representative of symmetrizable difference schemes. For such schemes a numerical algorithm is proposed and realized for constructing stability boundaries.

Pemanfaatan Metil Ester Sulfonat pada Pembuatan Deterjen Cair

2016 ◽  
Vol 7 (14) ◽  
pp. 143-155
Author(s):  
Eldha Sampepana ◽  
Suroto Hadi Saputra
Keyword(s):  
Fatty Acids ◽  
Methyl Ester ◽  
Linear Alkylbenzene Sulfonate ◽  
Emulsion Stability ◽  
Alcohol Sulfate ◽  
Stable Emulsion ◽  
Linear Alkylbenzene ◽  
Alkylbenzene Sulfonate ◽  
The Stability ◽  
The Right

In the manufacture of detergents still using surfactants (which serves as an emulsifier) of crude oil in the form of the AS. (alcohol sulfate) and LAS (linear alkylbenzene sulfonate), where this type of surfactant cannot be degraded by microorganisms when discharged into the environment, causing environmental pollution. Methyl ester sulfonate surfactant is an anionic surfactant which has a composition of C16 - C18 fatty acids are capable of acting against nature deterjensinya, while the C12 - C14 fatty acids contribute to the foaming effect. The purpose of this study was to look for the formulation of methyl ester sulfonate (MES) the right to produce a good detergent by using materials such as methyl ester sulfonate surfactant self-made, methyl ester sulfonate and sodium lauryl market Ester Sulfate (SLS) with a concentration of 15 %, 20 % and 25 %. Detergent results of the study have high detergency ( net ) compared with the detergency of detergent commercial, have a stable emulsion stability, the stability of the foam/foam detergent power made from methyl ester sulfonate surfactant produces less foam, compared with a detergent made from SLS and surfactant SNI 06-4075-1996 standards.

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