<p>Thermal energy storage is an important option for energy storage and dispatch, with phase change materials (PCMs) being widely used due to their high thermal storage capacity. This study developed enhanced phase change materials (EPCMs) by adding different concentrations of aluminum nitride (AlN) and boron nitride (BN) to soy wax and paraffin wax. The aim was to improve the thermal storage and release properties of SW and PW to expand the applicability of phase change materials in various fields. A differential scanning calorimeter was used to measure the phase change temperatures and heat of each sample. The results showed that soy wax-based EPCMs produced by adding AlN and BN to soy wax broadened the phase change temperature range during melting and solidification. The additions significantly increased the solidification heat (Hd) of soy wax by eliminating supercooling during solidification, with AlN outperforming BN. However, paraffin wax-based EPCMs obtained by adding AlN and BN to paraffin wax did not show significant improvement over paraffin wax in overall thermal storage and release performance. While soy wax has a lower energy storage density than paraffin wax, soy wax-based EPCMs addressed this limitation by significantly improving Hd and enabling use at lower temperatures. Therefore, soy wax-based EPCMs have potential applications in heat dissipation or heat recovery in lithium batteries and other electronic components requiring low-temperature operation.</p>