What is the difference between two-liquid primary cell and single-liquid primary cell

The two-liquid primary cell and single-liquid primary cell are two different types of primary cells, and their differences are mainly reflected in the structure and working principle of the battery.

Structural difference:

Dual-liquid primary battery: dual-liquid primary battery consists of two electrolytes, which are anode electrolyte and cathode electrolyte. The anode and cathode are separated by an electrolyte diaphragm, forming two half-cells. The anode and cathode are each connected to an external circuit that releases electrical energy through a chemical reaction.

Single-liquid primary battery: Single-liquid primary battery has only one electrolyte, which contains both cations and anions. There is no physical diaphragm between the anode and cathode, but rather the work of the battery is accomplished through the transfer of ions in the electrolyte.

Difference in working principle:

Dual-liquid primary battery: The anode and cathode of a dual-liquid primary battery are separated by an electrolyte diaphragm, and when an external circuit is connected, the anode undergoes an oxidizing reaction to release electrons, and the cathode undergoes a reducing reaction to absorb electrons. The electrons flow in the external circuit while the cations and anions are transported in the electrolyte through the electrolyte diaphragm to complete the work of the battery.

Single-liquid primary battery: There is no physical diaphragm between the anode and cathode of a single-liquid primary battery; instead, the work of the battery is accomplished through the transfer of ions in the electrolyte. When an external circuit is connected, the anode undergoes an oxidation reaction to release electrons and the cathode undergoes a reduction reaction to absorb electrons. The ions are transported through the solution in the electrolyte to complete the work of the battery.

In summary, the difference between a two-liquid primary battery and a single-liquid primary battery mainly lies in the structure and working principle. The two-liquid primary battery separates the anode and cathode through an electrolyte diaphragm, and ions are transmitted through the diaphragm; while the single-liquid primary battery has no physical diaphragm, and ions are transmitted through the solution in the electrolyte. These differences affect the performance and application range of the battery.