Triazine compounds for removing acids and water from nonaqueous electrolytes for electrochemical cells
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United States of America Patent
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Jun 1, 2010
Grant Date -
Nov 30, 2006
app pub date -
May 26, 2005
filing date -
May 26, 2005
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Abstract
A process is provided to produce non-aqueous electrolytic solution for use in batteries having low acid content and low water content. The invention involves removing acids and water from non-aqueous electrolytic solutions typically found in lithium or lithium-ion batteries by using nitrogen-containing compounds such as triazines. After treatment by a triazine such as melamine, the concentrations of acids and water in the electrolytic solutions are substantially decreased. The present invention provides a process to prepare extremely pure electrolytic solutions having low (<20 ppm) concentrations of both water and acids.
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