Skip to main content

PVDF Binder for Li-ion Battery Electrodes

When testing the electrochemical performance of metal oxide anode for lithium-ion batteries (LIBs), binder played important role on the electrochemical performance. There are different types of binders used for Li-ion battery electrodes like polyvinylidene fluoride (PVDF) and the mixture of styrene butadiene and sodium carboxylmethyl cellulose (SBA + CMC). Here we will mention PVDF type binder.
Polyvinylidene fluoride (PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride. PVDF is a specialty plastic used in applications requiring the highest purity, as well as resistance to solvents, acids and bases.
PVDF resins are polymers currently widely used by Li-ion battery manufacturers as binder material, especially in cathodes. PVDF is the standard binder material used in the production of composite electrodes for lithium-ion batteries. 1−2% weight solution of PVDF dissolved in N-methyl-2-pyrrolidone (NMP) is mixed with an active lithium storage material such as graphite, silicon, tin, LiCoO2, LiMn2O4, or LiFePO4 and a conductive additive such as carbon black or carbon nanofibers. This slurry is cast onto a metallic current collector and the NMP is evaporated to form a composite or paste electrode. PVDF is used because it is chemically inert over the potential range used, and does not react with the electrolyte or lithium. PVDF electrochemically stable in contact with electrolyte mixtures.
PVDF binders’ usage in Li-ion battery electrodes have these benefits that you can see below:
  • Excellent resistance to adverse weather conditions over a wide range of temperatures
  • Excellent mechanical strength
  • Outstanding chemical resistance
  • Good processing performance and workability
This subject is an interesting to many people and of course there are some papers written by the scientists about this subject. You may look at the paper which is about the effect of different binders on the electrochemical properties metal oxide anode for lithium-ion batteries:
If you would like to give order of PVDF Binder for Li-ion Battery Electrodes you may click the link given below:
Technical properties of our PVDF Binder for Li-ion Battery Electrodes are given below:
Technical ParameterUnitIndexTesting
Shape/White Powder/
Purity%≥99.5PVDF
standard specific gravity/1.74~1.77ASTM D 792
@23/ 23℃
Dielectric constant100MHz
100Hz		4.50~5.50
8.00~9.50		ASTM D150
Melting Point℃160-168ASTM D 3418
Melting Indixg/10min1-2/
Solubility/Transparent and dissolvable30℃，1hr
1g/10ml NMP
Rotation ViscositymPaS≥20001g/10ml NMP
Intrinsic ViscositydL/g1.0-2.0DMA， 30℃
Moisture%≤ 0.1Karl Fischer
Molecular Weight/600,000ASTM D 5296-05

Comments

Post a Comment

Popular posts from this blog

Carbon Nanotube Threads

Since its discovery, carbon nanotube (CNT) has attracted many interests in different technology fields due to its extraordinary properties. Properties such as, high strength, great electrical and thermal conductivity, light weight and flexibility made CNT one of the best materials for wide range of applications. However, from its name it can be understood that CNT is a nanoscale material which is very small to be applied for the production of daily products. Researchers all around the world are working on finding methods and techniques which could produce new materials with the extraordinary properties of CNT. Image retrieved from:  https://worldindustrialreporter.com/strong-light-flexible-carbon-nanotubes-threads-with-ultrahigh-conductivity/ One of these research is focusing on the production of high strength threads that can be used in the manufacturing of fabrics, cables and ropes. An international group of scientists were able to produce a flexible conductive thread th...
Post a Comment
Read more

Multi Walled Carbon Nanotube Dispersions

Carbon nanotubes (CNTs)  have attracted enormous attention in recent years due to its unique physical, electronic, optical and potential applications in materials science and nanotechnology. The van der Waals interaction between tubes, however, makes CNTs aggregate in most organic solvents and aqueous solutions, which is the major limitation of their practical applications.Various approaches have been studied to alter the CNT surface to promote the dispersion of individual nanotubes and prevent their reaggregation. On the basis of this widely accepted viewpoint, numerous techniques such as covalent bonding, surfactant coating and polymer wrapping have been developed for surface modification or sidewall functionalization.These methods, however, are complicated, time-consuming and cause permanent damage to the CNT structure and properties of the surface, which produces residues of the dispersion agent for the final product. Figure: Single Walled Carbon Nanotube (SWCNT) It ha...
Post a Comment
Read more

Magnesium Oxide Nanoparticles/Nanopowder and Applications

General Information about Magnesium Oxide Magnesium oxide which has the chemical formula of MgO, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of Magnesium. It is a white powder at room temperature. Magnesium Oxide has very high melting point (2825  o C) and boiling point (3600  o C).                                                                                                                                                                                Magnesium Oxide Nanoparticles/Nanopowder an...
Post a Comment
Read more