Formic acid-graphite intercalation compound

US5698088A · kind A · utility

Assignee

• The Hong Kong University of Science and Technology

Inventors

• Feiyu KANG · Tangxia, CN
• Yang Leng · Kowloon, CN
• Tong-Yi Zhang · Kowloon, CN

Key dates

• Filing date: Jul 8, 1996
• Grant date: Dec 16, 1997
• Expiry date: Jul 8, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B35/536
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A graphite intercalation compound is disclosed in which formic acid (HCOOH) is the intercalate. The GIC may be formed by an electrochemical process using formic acid solution as both the electrolyte and as the intercalate source. The resulting formic acid GIC may be expanded by rapid heating to produce an expanded graphite product that in turn may be mechanically processed into flexible graphite.