METHOD FOR DETERMINING DISPERSIBILITY OF ELECTRODE MATERIAL LAYER

The present invention discloses a method for determining dispersibility, of an electrode material layer of an electrode for a lithium rechargeable battery, wherein, regarding the electrode, an electrode material layer including an active material, a conductive material, and a binder is formed on at least one side of an electrode current collector, the determining of dispersibility of an electrode material layer includes (a) selecting two random points (1-1') of an electrode material layer, (b) finding a difference Δ1 of an absolute value of two voltage values by measuring voltages between the two points (1-1') in different current directions, (c) selecting two other random points (2-2' to n-n', where n is an integer that is equal to or greater than 2) that are different from two points selected in the process (a) and, and repeating the processes (a) and (b) at least once to find Δ2 to Δn, (d) finding a mean value of differences Δ1 to Δn of the absolute values obtained by repeating the process (b) and the process (c), and (e) finding a standard deviation of Δ1 to Δn from the mean value, and dispersibility of the electrode material layer is determined to be high as the standard deviation value of the process (e) becomes smaller.