ELECTRODE STRUCTURE AND SECONDARY BATTERY
FIG14 is a cross-sectional view schematically showing a state in which an electrospray device discharges droplets
Next, as shown in FIG14, droplets 232p of the raw material solution are discharged from the spinning nozzle 51 toward the surface of the electrode 20 by the electrospray deposition method. The droplets 232p reach the surface of the electrode 20 in a state in which a solvent is contained. At this time, the organic fibers 231 that are in contact with the droplets 232p are dissolved again in the solvent of the droplets 232p and integrated with the droplets 232p. Thereafter, most of the solvent of the droplets 232p is volatilized, and the organic material remaining on the surface of the electrode 20 becomes a resin mass 232. In this manner, the organic fibers-including layer 23 containing the resin mass 232 can be obtained.
cross-sectional view
51
spinning nozzle
14
observation range is
232
resin mass resin masses
20
electrode
52
high voltage generator
500
electrospray device
231
organic fiber organic fibers
33
positive electrode terminal
['1. An electrode structure (10) comprising: an electrode (20) comprising an active material-containing layer (20b); and a separator (22) comprising a layer (23) provided on a main surface (S1) of the active material-containing layer (20b), wherein the layer (23) comprises organic fibers (231) and a resin mass (232), the resin mass (232) is in contact with a portion of the main surface (S1) of the active material-containing layer (20b) and is integrated with a portion of the organic fibers (231), and when a length of the resin mass (232) is represented by a circumscribed quadrilateral of the resin mass (232), a length of a first side of the circumscribed quadrilateral and a length of a second side adjacent to the first side are each 10 µm or more.']