What is a galvanic cell?

　　Working principle of primary battery

　　The primary cell reaction belongs to exothermic reaction, generally oxidation-reduction reaction, but what is different from the general oxidation-reduction reaction is that electron transfer is not completed through the effective collision between oxidant and reductant, but the reductant loses electrons on the negative electrode to cause oxidation reaction, the electrons are transmitted to the positive electrode through the external circuit, and the oxidant gets electrons on the positive electrode to cause reduction reaction, Thus, electron transfer between reductant and oxidant is completed. The directional movement of ions in the solution between the two electrodes and the directional movement of electrons in the external wire form a closed loop, which enables the reaction between the two electrodes to proceed continuously, generating an orderly electron transfer process, generating current, and realizing the conversion of chemical energy to electrical energy.

　　application

　　It is widely used in industry and agriculture, national defense industry, communication, lighting, medical and other departments, and becomes the power supply of radios, recorders, cameras, calculators, electronic watches, toys, hearing aids and other commonly used appliances in daily life.

　　What are the common primary batteries?

　　The common primary battery is zinc manganese dry battery, which is the kind of battery we often install in remote control. Another type is lithium primary battery, also known as lithium battery, which is the general name of batteries with metal lithium as the negative pole. The last one is the battery.

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