Bor Nitrür ile kaplı 18650 Tip Li iyon Pillerinin Isıl ve Elektrokimyasal Özelliklerinin İyileştirilmesi

Abstract

Lithium-ion batteries have a significant safety concern since they are prone to thermal runaway as the battery technology advances to high energy density and fast charge requirements. To address this issue, new material solutions are emerging that provide better heat dissipation. Boron nitride is a promising candidate as a heat conductor material in thermal management systems because of its high thermal conductivity. Therefore, this material allows effective heat dissipation and reduces the risk of thermal runaway issues. To this end, hexagonal boron nitride (hBN) was coated onto the outer cases of 18650-type batteries to dissipate the heat produced inside the battery. A cyclic charge-discharge test was performed on the hBN-coated battery sample at 10C to compare the results with a reference sample with only a polymer insulator. The findings revealed that the hBN coating on the insulator-free battery case offered efficient heat dissipation, improved capacity retention, and less change in internal resistance. Thus, the hBN coating has the potential as a solution for the efficient thermal management of Li-ion battery cases.