Cell module and fuel cell having a water permeable hollow body

A cell module for a fuel cell, comprising:

• a cell module body which has a tube-shape extending in an axial direction and includes a tube-shaped hollow electrolyte membrane extending in the axial direction, a tube-shaped inner electrode extending in the axial direction and a tube-shaped outer electrode extending in the axial direction, the inner electrode being provided on an inner surface of the hollow electrolyte membrane and the outer electrode being provided on an outer surface of the hollow electrolyte membrane such that the inner electrode is within the outer electrode when viewed in a cross section that is substantially perpendicular to the axial direction, the inner electrode forming a first hollow portion therein that has a tube-shape;
• collectors, a respective one of the collectors being in contact with a respective one of the electrodes of the cell module body;
• and
• a water permeable hollow body which has a tube-shape extending in the axial direction, has an outer diameter that is smaller than an inner diameter of the inner electrode, and forms a second hollow portion therein that is configured to supply water, wherein
• the tube-shaped water permeable hollow body is co-axial with the tube-shaped inner electrode with a gap sustained therebetween, and
• the water permeable hollow body is a separate element from the collectors, and extends into the first hollow portion.