Alkaline battery, separator therefore

Schmidt, G F

Title: Alkaline battery, separator therefore

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Abstract

An improved battery separator for alkaline battery cells is described that has low resistance to electrolyte ion transfer and high resistance to electrode ion transfer. The separator is formed by applying an improved coating to an electrolyte absorber. The absorber, preferably, is a flexible, fibrous, and porous substrate that is resistant to strong alkali and oxidation. The coating composition includes an admixture of a polymeric binder, a hydrolyzable polymeric ester and inert fillers. The coating composition is substantially free of reactive fillers and plasticizers commonly employed as porosity promoting agents in separator coatings. When the separator is immersed in electrolyte, the polymeric ester of the film coating reacts with the electrolyte forming a salt and an alcohol. The alcohol goes into solution with the electrolyte while the salt imbibes electrolyte into the coating composition. When the salt is formed, it expands the polymeric chains of the binder to provide a film coating substantially permeable to electrolyte ion transfer but relatively impermeable to electrode ion transfer during use.

Inventors:: Schmidt, G F

Publication Date:: Tue Sep 23 00:00:00 EDT 1980

OSTI Identifier:: 6633887

Patent Number(s):: US 4224394

Assignee:: Kimberly-Clark Corp

Resource Type:: Patent

Resource Relation:: Patent File Date: Filed date 13 Jul 1979

Country of Publication:: United States

Language:: English

Subject:: 25 ENERGY STORAGE; BATTERY SEPARATORS; DESIGN; FABRICATION; BINDERS; COATINGS; FILLERS; ION MOBILITY; POLYACRYLATES; ESTERS; MOBILITY; ORGANIC COMPOUNDS; ORGANIC POLYMERS; PARTICLE MOBILITY; POLYMERS; POLYVINYLS; 250903* - Energy Storage- Batteries- Materials, Components, & Auxiliaries

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                    Schmidt, G F. Alkaline battery, separator therefore.  United States: N. p., 1980. 
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        "Alkaline battery, separator therefore".  United States.

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@article{osti_6633887,

  title        = {Alkaline battery, separator therefore},

  author       = {Schmidt, G F},

  abstractNote = {An improved battery separator for alkaline battery cells is described that has low resistance to electrolyte ion transfer and high resistance to electrode ion transfer. The separator is formed by applying an improved coating to an electrolyte absorber. The absorber, preferably, is a flexible, fibrous, and porous substrate that is resistant to strong alkali and oxidation. The coating composition includes an admixture of a polymeric binder, a hydrolyzable polymeric ester and inert fillers. The coating composition is substantially free of reactive fillers and plasticizers commonly employed as porosity promoting agents in separator coatings. When the separator is immersed in electrolyte, the polymeric ester of the film coating reacts with the electrolyte forming a salt and an alcohol. The alcohol goes into solution with the electrolyte while the salt imbibes electrolyte into the coating composition. When the salt is formed, it expands the polymeric chains of the binder to provide a film coating substantially permeable to electrolyte ion transfer but relatively impermeable to electrode ion transfer during use.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/6633887},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Sep 23 00:00:00 EDT 1980},

  month        = {Tue Sep 23 00:00:00 EDT 1980}

}

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