POSITIVE ELECTRODE, ELECTRODE BODY, AND BATTERY

To provide a positive electrode in which inclination of a current collector foil exposed portion is controlled.SOLUTION: A positive electrode 50 disclosed herein includes: a positive electrode current collector foil 52; positive electrode active material layers 54 formed on both surfaces of the positive electrode current collector foil 52; and a first protection layer 56 formed adjacent to the positive electrode active material layer 54 on one surface of the positive electrode current collector foil 52. The positive electrode current collector foil 52 has a positive electrode current collector foil exposed portion 52a in which the positive electrode current collector foil 52 is exposed, at least at one end. The first protection layer 56 is located between the positive electrode current collector foil exposed portion 52a and the positive electrode active material layer 54. The first protection layer 56 has an inclined portion 56a in which a thickness of the first protection layer decreases from a positive electrode active material layer 54 side toward a positive electrode current collector foil exposed portion 52a side. The inclined portion 56a is formed so that an angle of the inclined portion 56a to the surface of the positive electrode current collector foil 52 is constant or decreases toward the positive electrode current collector foil exposed portion 52a side.SELECTED DRAWING: Figure 3B 【課題】集電箔露出部の傾きが制御された正極を提供する。【解決手段】ここで開示される正極５０は、正極集電箔５２と、正極集電箔５２の両面に形成された正極活物質層５４と、正極集電箔５２の一方の表面で正極活物質層５４と隣接して形成された第１の保護層５６とを備えている。正極集電箔５２は、少なくとも一方の端部に、正極集電箔５２が露出した正極集電箔露出部５２ａを有し、第１の保護層５６は、正極集電箔露出部５２ａと、正極活物質層５４との間に位置しており、第１の保護層５６は、正極活物質層５４側から正極集電箔露出部５２ａ側に向かって厚みが小さくなるように形成された傾斜部５６ａを有している。傾斜部５６ａは、傾斜部５６ａの正極集電箔５２の表面に対する角度が、一定または正極集電箔露出部５２ａ側に向かって小さくなるように形成されている。【選択図】図３Ｂ