POSITIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY CELL
摘要
<p>A positive electrode active material for a non-aqueous electrode secondary cell which comprises a composite oxide containing iron and sodium as main components, having a hexagonal crystal structure, and exhibiting a value obtained by dividing the intensity of a peak corresponding to an interplanar spacing of 2.20 Å by the intensity of a peak corresponding to an interplanar spacing of 5.36 Å of 2 or less in the X-ray diffraction analysis of said composite oxide; and a method for preparing the positive electrode active material wherein the above composite oxide is prepared by heating a metal compound mixture mainly containing a sodium compound and an iron compound in the temperature range of 400 to 900°C, which comprises heating the metal compound mixture in an inert atmosphere in the temperature range of less than 100°C on the way of the rise in the temperature. The use of the above active material allows the manufacture of a cell which is free from the rapid reduction of the discharge voltage with the progress of discharge.</p>
申请公布号
WO2005096415(A1)
申请公布日期
2005.10.13
申请号
WO2005JP06117
申请日期
2005.03.30
申请人
YAMAKI, JUN-ICHI;OKADA, SHIGETO;SUMITOMO CHEMICAL COMPANY, LIMITED;KIYABU, TOSHIYASU;NAKANE, KENJI