METHOD FOR MANUFACTURING A VALUABLE-METAL SULFURIC-ACID SOLUTION FROM A WASTE BATTERY, AND METHOD FOR MANUFACTURING A POSITIVE ELECTRODE ACTIVE MATERIAL
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United States of America Patent
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Issued Date -
Nov 28, 2013
app pub date -
Aug 18, 2011
filing date -
Feb 17, 2011
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a method for manufacturing a valuable-metal sulfuric-acid solution from a waste battery, and to a method for manufacturing a positive electrode active material. The method for manufacturing the valuable-metal sulfuric-acid solution includes: a step of obtaining valuable-metal powder containing lithium, nickel, cobalt, and manganese from waste batteries; a step of acid-leaching the valuable-metal powder under a reducing atmosphere in order to obtain a leaching solution; and a step of separating the lithium from the leaching solution so as to obtain a sulfuric-acid solution containing the nickel, cobalt, and manganese.
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