Nichtwässrige Sekundärbatterie, aktives Material für positive Elektrode und Verfahren zu dessen Herstellung

摘要

A nonaqueous secondary battery comprising: a positive electrode; a negative electrode; and a nonaqueous ion conductor; the negative electrode comprising an active material which contains lithium or enables lithium to intercalate/deintercalate or insertion/desertion; the positive electrode comprising an active material which is a lithium manganese composite oxide having an X-ray diffraction pattern using a CuK alpha -ray which shows at least three peaks in the ranges between 15.2 DEG and 15.6 DEG , between 18.6 DEG and 18.8 DEG , and between 24.5 DEG and 25.1 DEG , the ratio of a peak intensity in the range between 27 DEG and 33 DEG to a peak intensity in the range between 15.2 DEG and 15.6 DEG being less than 0.02. A process for producing an active material for a positive electrode of a nonaqueous secondary battery, comprising the steps of: mixing a manganese inorganic compund with a lithium organic or inorganic compound to prepare a lithium manganese compound mixture; and calcinating the lithium manganese mixture under the condition at a temperature between about 400 DEG C and about 2000 DEG C.