The difference between dry cells and lithium batteries mainly lies in the raw materials used in manufacturing, which results in different electrochemical properties.
In general, the electrochemical performance of lithium batteries is much better than that of dry batteries, but in terms of manufacturing cost, they are much more expensive. The main operating principle of dry batteries is the redox reaction, which is carried out in a closed loop.
It is very similar to a primary battery, which converts chemical energy into electrical energy. Common dry batteries are zinc-manganese batteries, with a positive carbon rod in the middle, wrapped with a mixture of graphite and manganese dioxide, then a layer of fiber mesh.
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The Internet is covered with a thick electrolytic paste, composed of a solution of cammonium chloride and starch, as well as a small amount of preservatives. The outermost layer is a zinc metal cylinder, which constitutes the negative electrode. Dry batteries are also called voltaic batteries. A voltaic battery is made up of several groups of circular plates appearing in pairs and stacked in a certain order. There are two different metal plates on the circular plate, and there is a layer of fabric between the layers to conduct electricity.
Dry batteries are very polluting. In the past, many batteries contained heavy metals like mercury and lead, which seriously polluted the environment. Because they are disposable batteries, they are quickly exhausted and thrown away, but lithium batteries do not contain harmful metals. Lithium batteries also have a fast charging function and a very high lifespan, beyond the reach of dry batteries, and noMany lithium batteries now have protection circuits inside.