| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cathode active material manufacturing method which can offer a nonaqueous electrolytic secondary battery having good cycle characteristics and arranged so that its capacity deterioration is suppressed, and to provide a cathode active material manufactured by the method, a cathode with the cathode active material used therein, and a nonaqueous electrolytic secondary battery. <P>SOLUTION: The cathode active material manufacturing method which can solve the problem comprises the steps of: preparing a liquid solution by dissolving, in a solvent, predetermined amounts of lithium source, M source, phosphorus source, and X source necessary for forming a cathode active material expressed by the general formula (1) below and having an olivine structure; gelatinizing the resultant liquid solution by adding a cyclic ether; and producing a lithium-containing complex oxide covered with carbon by burning the resultant gel, whereby a compound expressed by the following general formula (1) is obtained: Li<SB POS="POST">x</SB>M<SB POS="POST">y</SB>P<SB POS="POST">1-z</SB>X<SB POS="POST">z</SB>O<SB POS="POST">4</SB>, where M is at least one element selected from a group consisting of Fe, Ni, Mn, Zr, Sn, Al and Y, and X is at least one element selected from a group consisting of Si and Al, and the numbers x, y and z meet the conditions of 0<x≤2, 0.8≤y≤1.2, and 0≤z≤1. <P>COPYRIGHT: (C)2012,JPO&INPIT |
