To solve this problem, we should first make it clear that polymer cells are a component of lithium-ion batteries, which are lithium cells.

            Lithium battery: lithium battery includes liquid lithium ion battery and polymer battery. As for which of the two types of cells is more stable, this can not be generalized, mainly depends on the technical level of manufacturers.

            Polymer cell: polymer cell is also a type of lithium ion battery cell, different from the first time of the liquid electrolyte of 18650 cell, polymer is used in the gel electrolyte, so it is the same lithium ion battery, but also distinguished from the 18650 cell. Polymer cells are widely used. At present, many mobile devices are powered by polymer cells, especially mobile phones and mobile power sources.

Polymer cells have the advantages of high safety, large capacity and variable shape.

1. High safety

Relatively speaking, the polymer cell than 18650 cell security is a little higher, or the occurrence of dangerous damage is not so big, in general, the polymer cell is most of the bulge, rupture, and combustion, no explosion produced directly destructive strong.

2 large capacity

Compared with ordinary batteries, polymer has a relatively large capacity, with a gram capacity of 100/115mah /g.

3. Flexible shape

Because the polymer is packed with aluminum film and has no fixed shape, flat cells can be produced or customized to meet different needs of different customers. It is very flexible.

4. Fast charging speed

Polymer cells charge faster and discharge more smoothly than other battery types.

5 the weight is relatively light

Polymer cells are lighter than 18650 cells of the same size, thanks to the need to protect them with hard shells.

6 expanded contents

According to the different electrolyte materials used, the lithium ion battery inside the mobile power supply can be divided into liquid lithium ion battery (LIB) and polymer lithium ion battery (LIP). They use the same anode and cathode materials, including lithium cobalt oxide, nickel-cobalt manganese and lithium iron phosphate materials, and graphite. The working principle of the battery is basically the same.

The main difference is in electrolytes, where liquid lithium-ion batteries use liquid electrolytes and polymer lithium-ion batteries use solid polymer electrolytes instead. The polymers, which can be "dry" or "colloidal", currently use mostly colloidal electrolytes.