Appeal 2007-1024
Application 10/231,144
STATEMENT OF THE CASE
Applicant’s invention is directed to a non-aqueous electrolyte battery.
Applicant states that there is an increasing demand for high energy density
batteries for use in portable consumer electronic products. (Specification 1).
According to Applicant, there is a need for a non-aqueous electrolyte
secondary battery having high capacity in terms of charge/discharge and
cycle life. (Id. at p. 4).
There is only one independent claim on appeal, claim 17. Claim 17 is
representative of the claims on appeal and reads as follows:
A non-aqueous electrolyte secondary battery comprising:
a positive electrode comprising a positive electrode material
layer and a positive electrode core member for supporting said
positive electrode material layer, said positive electrode
material layer formed of a paste comprising a positive electrode
active material, a conductive agent, a first binder A and a
second binder B, said positive electrode active material
comprising a lithium-containing transition metal oxide, said
conductive agent comprising carbon black;
a negative electrode comprising a negative electrode
material layer and a negative electrode core member for
supporting said negative electrode material layer; and
a non-aqueous electrolyte comprising a non-aqueous
solvent dissolving a lithium salt,
wherein said conductive agent contained in said positive
electrode material layer forms agglomerated particles having a
particle size of less than 10 μm and a contact angle θA between
said non-aqueous electrolyte and said binder A and a contact
angle θB between said non-aqueous electrolyte and said binder
B satisfy the formula (1): θB – θA ≥ 15o.
2
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