Hello, I am happy to answer your question
Generally speaking, the electrolyte is responsible for transporting ions between the positive and negative electrodes and forming an electrical balance between the two poles with the electron. transfer of the external circuit. That is, whenever a certain amount of electrons moves from the negative electrode to the positive electrode via the external circuit, a corresponding amount of cations in the electrolyte will move from the electrode negative to the positive electrode, or anions lit accordingly will move. from the positive electrode to the negative electrode. For example, in a hydrogen-oxygen fuel cell, hydrogen atoms lose electrons and become hydrogen ions from the negative electrode to the positive electrode through the proton exchange membrane.
This means that if the electrolyte exists in the form of a saline solution, at least one ion dns the solution is a positive or negative component.
For example, in lithium-ion batteries, lithium ions are carried in organic solvents and are components of the cathode material.
If the mentioned sodium salt is used as the electrolyte solute, it is basically a sodium aqueous electrolyte battery, and the negative electrode uses a group IV metal as the ion receptor sodium. If other metals are used, the sodium salt has no significance in the electrolyte.
Lithium batteries will explode or catch fire if they are overcharged, but not if they are overdischarged, because there is no energy left inside the battery after overdischarge.
Nickel metal hydride batteries will explode if overcharged, but they will not catch fire because the water-based electrolyte used cannot burn. When the voltage reaches a certain level, the electrolyte decomposes and internal pressure increases. will explode. Relatively speaking, nickel-metal hydride batteries are much safer. This is one of the reasons why lithium batteries need protective plates, but nickel-metal hydride batteries do not.