In lithium ion batteries it is very important to choose a good binder for the electrodes. There are some requirements that the binder has to meet to have durability and long cycle life. The binder should be chemically inert and electrochemically stable to get the best performance from lithium ion batteries. The other important point is that these properties should be gotten by lower amounts of binders.
One of these binders that meet the requirements is Polytetrafluoroethylene (PTFE) Condensed Liquid Binder for Li-ion Battery. PTFE is a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications. PTFE is a fluorocarbon solid, as it is a high-molecular-weight compound consisting of carbon and fluorine. PTFE is hydrophobic material; so, it does not interact with water or water containing substances because of the London forces due to high electronegativity of fluorine.
PTFE binders has a CF2-CF2 unit which demonstrates excellent chemical stability for Li-Ion battery applications. PTFE condensed liquid binder is also environmentally friendly. In this binder water is used as solvent that is not harmful to health. PTFE has excellent chemical resistance. PTFE binders also have high heat and cold resistance. It provides high resistance to fire and also it has low water absorption. PTFE is also resistant to UV rays (ultraviolet) and it has good weather resistance, low friction coefficient.
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