Electrodepositable battery electrode coating compositions having coated active particles
a coating composition and active particle technology, applied in the direction of electrochemical generators, fixed capacitor details, cell components, etc., can solve the problems of unsatisfactory electrodes having poor adhesion and/or poor battery performance, health and environmental hazards, and slurries. , to achieve the effect of improving the adhesion and/or battery performance, and improving the performance of the battery
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example 1
on of Dispersant
[0204]To a four-neck round bottom flask equipped with a mechanical stir blade, thermocouple, and reflux condenser was added 493.2 grams of diacetone alcohol. The diacetone alcohol was heated to a set point of 122° C. under a nitrogen atmosphere. A monomer solution containing 290.4 grams of methyl methacrylate, 295 grams of ethylhexyl acrylate, 51.5 grams of butyl acrylate, 187.3 grams of N-vinyl pyrrolidone, and 112.4 grams of methacrylic acid was thoroughly mixed in a separate container. An initiator solution of 9.1 grams of tert-amyl peroctoate and 163.8 grams of diacetone alcohol was also prepared in a separate container. The initiator and monomer solutions were co-fed into the flask at the same time using addition funnels over 210 and 180 minutes, respectively. After the initiator and monomer feeds were complete, the monomer addition funnel was rinsed with 46.8 grams of diacetone alcohol and the initiator addition funnel was rinsed with 23 grams of diacetone alco...
example 2
on of Fluoropolymer and Dispersant Dispersion
[0207]In a plastic cup was placed 96.27 grams of water, 121.85 grams (27.8 g solids) of the dispersant from Example 1, and 0.16 grams of a de-foaming agent (DREWPLUS). The resultant mixture was stirred vigorously using a Cowles blade while maintaining a modest vortex. This mixing was continued while 64.85 grams of polyvinylidene difluoride powder (RZ-49, commercially available from Asambly Chemical) was added in small portions. Mixing was continued for an additional 45 minutes after all the polyvinylidene difluoride powder was added.
examples 3-8
of Electrodepositable Coating Compositions Including Metal-Oxide Coated Active Particles and Positive Electrodes Produced by Electrodeposition Thereof
[0208]Electrodepositable coating compositions were produced by combining the ingredients for each example as follows: To a plastic cup was added 0.59 g of a dispersion of a pH-dependent rheology modifier (0.17 g solids, 0.6% by weight of total solids; ACRYSOL™ ASE-60 from DOW Chemical Co.), 2.89 g of the dispersion of PVDF and dispersant prepared in Example 2 (0.66 g fluoropolymer solids, 2.4% by weight of total solids; 0.28 g dispersant solids, 1.0% by weight of total solids), 1.69 g of ethanol, and 21.9 g of deionized water. This mixture was mixed in a centrifugal mixer at 2,000 RPMs for 5 minutes. Next, 25 g (90% by weight of the total solids) of a metal-oxide coated electrochemically active material of lithium nickel manganese cobalt oxide with a ratio of Ni:Mn:Co of 6:2:2 coated with either titania or alumina at one of three level...
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Abstract
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