Carbon blacks and use in electrodes for lead acid batteries

US9287565B2 · kind B2 · utility

Assignee

• Cabot Corporation · US

Inventors

• Paolina Atanassova · Waltham, US
• Berislav Blizanac · Albuquerque, US
• Kenneth C. Koehlert · Medford, US
• Geoffrey D. Moeser · Groton, US
• Miodrag Oljaca · Avondale Estates, US
• Yipeng Sun · Plainsboro, US
• Danny Pierre · Malden, US
• Jeffrey S. Sawrey · Westford, US

Key dates

• Filing date: Apr 4, 2013
• Grant date: Mar 15, 2016
• Expiry date: Feb 19, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A carbon black having a combination of properties with values in ranges selected to promote high conductivity, high hydrophobicity, and reduced outgassing in lead acid batteries while maintaining high charge acceptance and cycleability. The carbon black has a Brunauer-Emmett-Teller (BET) surface area ranging from 100 m2/g to 1100 m2/g combined with one or more properties, e.g., a surface energy (SE) of 10 mJ/m2 or less, and/or a Raman microcrystalline planar size (La) of at least 22 Å, e.g., ranging from 22 Å to 50 Å. In some cases, the carbon black has a statistical thickness surface area (STSA) of at least 100 m2/g, e.g., ranging from 100 m2/g to 600 m2/g.