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US 2022/0021077 A1Published application
Precipitated silica for battery separator
AssigneeRhodia Operations
InventorsJules VALENTE, Brice SCHLEGEL, Lionel BARRIQUAND
Life of this patent
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Abstract
A precipitated silica suitable for use in lead-acid battery separators having a good balance between mechanical properties and electrical resistivity. In particular, a precipitated silica characterised by a DOA oil absorption equal to or greater than 200 mL/100 g; a median aggregate size D50M equal to or lower than 8.7 μm and equal to or greater than a parameter A whose value, expressed in microns, is calculated from equation (I): A=23.3−0.076×|DOA|, wherein |DOA| represents the numerical value of the DOA oil absorption expressed in mL/100 g.
Claims17
A precipitated silica characterised by:
- a DOA oil absorption equal to or greater than 200 mL/100 g;
- a median aggregate size D50M equal to or lower than 8.7 μm and equal to or greater than a parameter A whose the value, expressed in microns, is calculated from equation (I):
- A=23.3−0.076×|DOA| (I)
- wherein |DOA| represents the numerical value of the DOA oil absorption expressed in mL/100 g.
1 more element
Dependencies are inferred from the claim text.