1. Cost: There is a big difference in cost between sodium battery and lithium battery. First of all, sodium is a common metal element and its price is relatively cheap. In contrast, the price of lithium is relatively high. Therefore, in terms of material cost, sodium batteries have certain advantages over lithium batteries.

2. Performance: There are some differences in energy density between sodium battery and lithium battery. Energy density refers to the energy that can be stored in a battery with unit volume or unit mass. In this respect, the energy density of lithium batteries is higher than that of sodium batteries. At present, the energy density of popular lithium ion batteries in the market has reached more than 200Wh/kg, while the energy density of sodium ion batteries is only about 100 Wh/kg. This means that lithium batteries can store more energy under the same volume or mass, thus providing a longer service life.