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US 2021/0202950 A1Published application
Electrode binder composition for lithium ion electrical storage devices
AssigneePPG Industries Ohio, Inc.
InventorsStuart D. Hellring, Randy E. Daughenbaugh, Shanti Swarup, Ellor James Van Buskirk
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Abstract
An electrode binder of a lithium ion battery comprising: (a) a polyvinylidene binder dispersed in an organic diluent with (b) a (meth)acrylic polymer dispersant. The binder can be used in the assembly of electrodes of lithium ion batteries.
Claims28
A binder composition comprising a dispersion of:
- (a) a polyvinylidene fluoride polymer dispersed in an organic dispersion medium with
- (b) a (meth)acrylic polymer dispersant prepared from a mixture of monomers comprising 2 to 50 percent by weight of alpha, beta-ethylenically unsaturated carboxylic acid, the percent by weight based on total monomer weight;
- and
- (c) a separately added crosslinking agent.
1 more element
An electrode comprising:
- (a) an electrical current collector;
- (b) a cured film formed on the collector (a) comprising:
- (i) a polyvinylidene fluoride polymer,
- (ii) a crosslinked (meth)acrylic polymer dispersant prepared from a mixture of monomers comprising 2 to 50 percent by weight of alpha, beta-ethylenically unsaturated carboxylic acid, the percent by weight based on total monomer weight, wherein the crosslinked (meth)acrylic polymer dispersant is crosslinked with a separately added crosslinking agent,
- (iii) a conductive material, and
- (iv) an electrode active material capable of lithium intercalation/deintercalation.
3 more elements
Dependencies are inferred from the claim text.