Pouch-type secondary battery with excellent insulation and heat-dissipating properties

A pouch type secondary battery, comprising:

• a pouch type battery case including an electrode assembly housing portion and a sealing portion;
• and
• an electrode assembly housed in the housing portion,
• wherein the sealing portion includes:
• a bent portion formed by bending the sealing portion toward the housing portion, and
• a first insulation coating layer is-bonded to an inner surface and an outer surface of the bent portion, and to an end surface of the bent portion extending between and connecting the inner surface and the outer surface of the bent portion,
• wherein an outer surface of the first insulation coating layer bonded to the inner surface of the bent portion is bonded to an outer surface of a wall of the housing portion,
• wherein
• the first insulation coating layer includes:
• a portion containing a first binder and first heat-dissipating particles having a thermal conductivity of 0.2 w/(mk) or more, and a first joint portion containing the first binder and not containing the first heat-dissipating particles,
• wherein the first joint portion is bonded to the outer surface of the wall of the housing portion.