Electrode construct, electrode group, secondary battery, battery pack, vehicle, and stationary power supply

An electrode construct, comprising:

• an electrode comprising an active material-containing layer and a current collecting layer, the active material-containing layer comprising a first principal surface and a second principal surface on a reverse side to the first principal surface, and the current collecting layer being in contact with the second principal surface of the active material-containing layer;
• and
• a composite membrane comprising a composite layer, the composite layer comprising inorganic solid particles and a polymeric material, and the composite layer being in contact with the first principal surface of the active material-containing layer,
• a peel strength σ1 at a first interface between the active material-containing layer and the composite layer, and a peel strength σ2 at a second interface between the active material-containing layer and the current collecting layer satisfying a relationship of σ1>σ2, the peel strength σ1 satisfying σ1≥1.5 N/cm, and the peel strength σ2 satisfying σ2≤1 N/cm.