Following in the footsteps of lithium-ion batteries, sodium-ion batteries have emerged as a highly promising energy storage technology with immense commercial potential, primarily due to the abundant availability and low cost of sodium resources. Nevertheless, their practical applications have been somewhat hindered by their relatively low energy density. To boost this energy density, a viable strategy involves the utilization of high-voltage, high-capacity cathode and anode materials. However, these materials present stringent demands on electrolytes, necessitating resistance to high-voltage oxidation, the ability to accommodate volume expansion, and the suppression of side reactions. Hence, the development of compatible liquid organic electrolytes, specifically designed for particular electrode systems, is of paramount importance in fully harnessing the potential of sodium-ion batteries and facilitating their path to commercialization.