Dry cell (Dry cell) battery is a kind of robot to paste the electrolyte to generate direct current chemical batteries (wet cell is for the use of liquid electrolyte chemical battery), roughly divided into two kinds, a battery and secondary battery is for common use of daily life, as well as the portable battery. It can be in the laboratory of homemade battery can be used in many electrical appliances. Common dry cell for zinc manganese battery (or zinc carbon batteries, namely dry Leclanche cell).
Dry cell belongs to the chemical power of the battery, is a kind of disposable batteries. Because this kind of chemical power source device the flow of electrolyte is a kind of can't paste, it is called a dry cell, this is relative to a flow of electrolyte battery. Dry cell is not only applicable to the flashlight, transistor radio, tape recorder, camera, electronic clock, toys and so on, and also for national defense, scientific research, telecommunications, navigation, aviation, medicine, etc. In all areas of the national economy, is very good. Ordinary dry-cell batteries are mostly zinc manganese battery, the middle one is the anode carbon rod, a mixture of graphite and manganese dioxide of outsourcing, the outside is a layer of fibres. Online electrolyte with very thick paste, its composition is the ammonium chloride solution and starch, and small amounts of preservatives. The outermost layer is made of metal zinc skin tube, which is negative, the battery discharge is the ammonia chloride and zinc electrolytic reaction, release the charge by graphite conductive to the anode carbon, zinc electrolysis reaction is will release hydrogen, this gas is may increase the risk of battery internal resistance, and mixed with graphite manganese dioxide is used to absorb hydrogen. But if the work or the battery is too long, manganese dioxide is too late or have had no ability to absorb nearly saturated, the battery will be lost due to internal resistance is too large, the output current is too small. But at the moment, if the battery heating, or place a period of time, its internal accumulation of hydrogen will heat release or slow release. Manganese dioxide by reduction to restore, also the battery was alive again!
Chemical equations for：Zn+2MnO2+2NH4Cl= ZnCl2+Mn2O3+2NH3+H2O
Don't anatomical dry cell!!!!! Do not put it in the fire to burn or burn.
