Appeal 2007-1524
Application 09/770,725
1 electrode, either a lithium-containing titanium oxide or lithium-containing
2 iron sulfide as a positive electrode, and a non-aqueous electrolyte.
3 (Watanabe, 3:45-50.) Watanabe teaches that the negative electrode may
4 contain non-metals such as carbon in addition to the lithium-containing
5 silicon oxide and specifically discusses the use of calcined carbonaceous
6 compounds capable of absorbing and releasing lithium ion or lithium metal.
7 (Watanabe, 6:2-14, 7:37-40.) As to the positive electrode, Watanabe teaches
8 that it may contain other metals such as nickel and manganese in addition to
9 lithium and titanium. (Watanabe, 8:22-34.) Watanabe also discloses the use
10 of lithium salts such as lithium phosphorus hexafluoride (LiPF6) as the
11 electrolyte. (Watanabe, 12:44-46.)
12 According to Watanabe, the battery is desirably assembled in a
13 moisture-free atmosphere. (Watanabe, 14:37-38.) Specifically, Watanabe
14 discloses the moisture content to be preferably 2,000 ppm or less for the
15 entire battery and 50 ppm for the positive electrode mixture, the negative
16 electrode mixture, or the electrolyte from the point of cycle property.
17 (Watanabe, 14:47-51.)
18 Kurose discloses a non-aqueous electrolyte battery including a nickel-
19 containing lithium composite oxide as an electrode active material. (Kurose,
20 2:35-40.) Kurose’s nickel-containing lithium composite oxide has the
21 formula LixNiyMzO2 (where x satisfies 0.8<x<1.5, y+z satisfies
22 0.8<y+z<1.2, z satisfies 0≤z<0.35, and M is at least one element selected
23 from Co, Mg, Ca, Sr, Al, Mn, and Fe). (Kurose, 2:35-43.) In the working
24 examples, Kurose teaches the use of the nickel-containing lithium composite
25 oxide as a positive electrode material, metallic lithium as a negative
12
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