| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power storage device having favorable battery characteristics without using lithium or a compound containing lithium for a negative electrode and a method for manufacturing the power storage device. <P>SOLUTION: A power storage device includes at least a positive electrode and a negative electrode provided opposite to the positive electrode across an electrolyte. The positive electrode comprises a collector and a film containing an active material provided over the collector. The film containing the active material contains Li<SB POS="POST">e</SB>Fe<SB POS="POST">f</SB>P<SB POS="POST">g</SB>O<SB POS="POST">h</SB>satisfying relations of 3.5≥h/g≥4.5, 0.6≥g/f≥1.1, and 0≥e/f≥1.3 and Li<SB POS="POST">a</SB>Fe<SB POS="POST">b</SB>P<SB POS="POST">c</SB>O<SB POS="POST">d</SB>satisfying relations of 3.5≥d/c≥4.5, 0.6≥c/b≥1.8, and 0.7≥a/b≥2.8, and has Li<SB POS="POST">a</SB>Fe<SB POS="POST">b</SB>P<SB POS="POST">c</SB>O<SB POS="POST">d</SB>satisfying relations of 3.5≥d/c≥4.5, 0.6≥c/b≥1.8, and 0.7≥a/b≥2.8 in a region in contact with the electrolyte. <P>COPYRIGHT: (C)2012,JPO&INPIT |
