The energy efficiency of an ice-based cold storage system (CSS) is intensively affected by its supercooling nature, low phase change temperature and probable nucleation behavior. As a result of this, the chiller should be operated at a lower evaporator temperature to freeze the water as well as to achieve better heat transfer performance. By virtue of this, the coefficient of performance of the chiller is significantly reduced, which in turn results in ineffective utilisation of energy sources for CSS. To tackle this issue, the water should be replaced with a suitable alternate PCM, which has no supercooling and high phase change temperature. In this study, 1-Decanol has been identified as a prospective replacement for water, and its energy storage performance has been enhanced in a practically feasible and economically viable way using an aluminium honeycomb core (AHCC). The effect of different sizes (small, medium and large) of AHCC on the charging performance of 1-Decanol has been explored in the spherical capsule (S.C). Further, the effect of adding AHCC, the diameter of S.C and wall temperature on the energy storage performance of 1-Decanol have been explored. It is found that the medium size AHCC is an optimal size for charging and discharging. Also, −3 °C is an optimal wall temperature for charging. The lower diameter S.C delivered better charging and discharging performance for a specified storage volume. For the 1-Decanol + AHCC based CSS, the effective utilisation ratio is remarkably high (10.49 to 14.96), and the reduction in energy storage capacity is only minimal (1.24% to 1.81%). Experimental results prove that upon adding medium size AHCC, the average enhancement in charging rate is 150.32%. Further, the average reduction in charging time is 60.09%, which signifies that chiller operating time and carbon emission can be reduced by 60.09%. The above results prove that the employment of AHCC to enhance the charging performance of 1-Decanol would lay the foundation for establishing energy-efficient and sustainable CSS.