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US 7,022,878 B2Granted
Organic borate compounds and the nonaqueous electrolytes and lithium secondary batteries using the compounds
AssigneesHitachi, Ltd., Kanto Kagaku Kabushiki Kaisha
InventorsJuichi Arai, Hideaki Katayama, Mitsuru Kobayashi, Hiroyuki Yamaguchi, Hideki Takahashi, Masaru Kato
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Abstract
Organic borates having the formula: The borates are highly soluble in solvent of low dielectric constant. Also disclosed are nonaqueous electrolytes made from these organic borates; lithium secondary batteries with improved high-temperature storage characteristics; and electric appliances that comprises the battery and are free of protection circuits.
Claims2
An organic borate compound of formula (1)
- wherein X denotes lithium, and R1, R2, R3, and R4 each independently denotes a halogen-substituted alkyl group whose carbon number ranges from 1 to 4.
Dependencies are inferred from the claim text.