What is the working principle of dry battery? Are dry batteries rechargeable?

Dry cell is a kind of chemical battery that uses paste electrolyte to generate direct current (wet battery is a chemical battery that uses liquid electrolyte). It is a primary battery and is commonly used in daily life and is a light battery. It can be used in many electrical appliances with self-made batteries in the laboratory. Generally, dry batteries are mostly manganese-zinc batteries, with a positive carbon rod in the middle, a mixture of graphite and manganese dioxide, and a layer of fiber mesh on the outside. The net is coated with a thick electrolyte paste, which is composed of ammonia chloride solution and starch, and a small amount of preservatives. The important working principle of dry battery is that the oxidation-reduction reaction is realized in a closed circuit. The dry battery is the primary battery in the chemical pole power supply. It is a kind of disposable battery. Its carbon rod is used as the positive electrode, and the zinc cylinder is used as the negative electrode to convert chemical energy into electrical energy. Supply external circuit. In the chemical reaction, because zinc is more active than manganese, zinc loses electrons and is oxidized, while manganese gets electrons and is reduced. Dry battery discharge is the electrolysis reaction of ammonia chloride and zinc. The charge released is conducted by graphite to the positive carbon rod. The electrolysis reaction of zinc will release hydrogen gas, which will increase the internal resistance of the battery. The manganese dioxide mixed with graphite is used to absorb hydrogen. But if the battery continues to work or is used for too long, the manganese dioxide will be too late or nearly saturated and unable to absorb it. At this time, the battery will lose its use due to too much internal resistance and too little output current. But at this time, if the battery is heated or left for a period of time, the concentrated hydrogen inside it will be heated or slowly released, and the manganese dioxide will also be restored and restored, then the battery will be alive again! Dry batteries are not only suitable for flashlights, semiconductor radios , Radio cassette recorders, cameras, electronic clocks, toys, etc. It is also suitable for various fields in the national economy such as national defense, scientific research, telecommunications, navigation, aviation, and medicine. It is very easy to use. Are dry batteries rechargeable? Dry batteries cannot be recharged. After we have used up the power, we cannot recharge them for secondary use, because our common acid batteries cannot undergo a reduction reaction when the energy in it is completely released. If the battery cannot be charged, then it must not be charged, otherwise the battery may explode and endanger personal safety. Dry batteries are disposable batteries, that is, common carbon batteries, alkaline batteries, the internal chemical reaction is converted into electrical energy, irreversible, there are safety hazards in charging, or it may explode, the manual also says that the general dry battery is Zinc-manganese dioxide system. This system cannot be charged and should be discarded straightly. Charging straightly will cause explosion hazard. In an emergency situation, Charcoal can try to do this: perforate the battery, and then inject saturated sodium chloride salt water into it, which can slightly extend the service life. Disclaimer: Some pictures and content of the articles published on this site are from the Internet, please contact to delete if there is any infringement. Previous: Where are the advantages of lithium battery electric vehicles