Back to results
US 12,113,221 B2Granted
Binder composition for secondary battery positive electrode, conductive material paste composition for secondary battery positive electrode, slurry composition for secondary battery positive electrode, positive electrode for secondary battery and method of producing same, and secondary battery
AssigneeZeon Corporation
InventorsShinsuke Sugawara, Naoki Takahashi
Life of this patent
Estimating the term…
Abstract
A binder composition for a secondary battery positive electrode contains a specific polymer. The specific polymer includes a nitrile group-containing monomer unit and a linear alkylene structural unit having a carbon number of 4 or more. The pH of an extract of the specific polymer that is obtained by a specific method is 5.5 or higher.
Claims10
A binder composition for a secondary battery positive electrode comprising a polymer, wherein
- the polymer includes a nitrile group-containing monomer unit and a linear alkylene structural unit having a carbon number of 4 or more,
- the polymer has a nitric acid content of 30 ppm or less by mass, and
- when the polymer is subjected to an extraction, an extract of the polymer has a pH of 5.5 or higher, where the extraction is performed by preparing an 8 mass % N-methyl-2-pyrrolidone solution of the polymer, diluting the solution by a factor of 10 with deionized water, and extracting liquid encapsulated in the polymer by pressing the polymer.
Dependencies are inferred from the claim text.