| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a positive electrode material providing a lithium secondary battery with a high capacity and a high level of safety required of a battery for a plug-in hybrid vehicle, and a lithium secondary battery achieving a high capacity and a high level of safety. <P>SOLUTION: A positive electrode material in accordance with an embodiment of the present invention contains a first positive electrode active material represented by the formula: Li<SB POS="POST">1.1+x</SB>Ni<SB POS="POST">a</SB>M1<SB POS="POST">b</SB>M2<SB POS="POST">c</SB>O<SB POS="POST">2</SB>, where M1 represents Mo or W, M2 represents Co, or a combination of Co and Mn, -0.07≤x≤0.1, 0.7≤a<0.98, 0.02≤b≤0.06, and 0<c≤0.28, and a second positive electrode active material represented by the formula: Li<SB POS="POST">1.03+x</SB>Ni<SB POS="POST">a</SB>Ti<SB POS="POST">b</SB>M3<SB POS="POST">c</SB>O<SB POS="POST">2</SB>, where M3 represents Co, or a combination of Co and Mn, -0.03≤x≤0.07, 0.7≤a≤0.8, 0.05≤b≤0.1, and 0.1≤c≤0.25. The mass percentage of the first positive electrode active material with respect to the total mass of the first positive electrode active material and the second positive electrode active material is 30% or higher. <P>COPYRIGHT: (C)2013,JPO&INPIT |
