Thermal energy storage with a phase-change material in a non-metal container

A thermal energy storage apparatus that absorbs thermal energy from a heat-generating device, the thermal energy storage apparatus comprising:

• a non-metal container configured to receive the heat-generating device thereon;
• a phase-change material contained in the non-metal container and configured to absorb at least a portion of heat from the heat-generating device through the non-metal container;
• and
• a substrate having a first primary surface and a second primary surface opposite to the first primary surface, the substrate including an opening configured to embed the non-metal container therein such that a primary surface of the non-metal container is exposed to receive the heat-generating device thereon.