This is the general source of the various manifestations of the two. Polymer batteries refer to the use of polymer materials in at least one of the three major components of positive electrode, negative electrode or electrolyte. Macromolecules mean high molecular weight, and the corresponding concept is small molecules. Macromolecules have high strength, high toughness and high elasticity. The polymer materials currently developed for polymer batteries are mainly used for positive electrodes and electrolytes. ①In addition to inorganic compounds of lithium-ion batteries, the positive electrode material of polymer batteries can also use conductive polymers; ②. The electrolytes of polymer batteries include polymer electrolytes (solid or colloidal) and organic electrolytes, which are used in lithium-ion batteries. Electrolyte (liquid or colloid)
2. The difference in shaping
The polymer battery can be thin, any area and any shape, because its electrolyte can be solid or colloidal instead of liquid, and lithium-ion batteries use electrolyte, and a solid shell is required as a secondary package to accommodate the electrolyte. liquid. Therefore, this also adds some weight to the lithium-ion battery.
Most of the current polymers are soft-pack batteries, which use aluminum-plastic film as the outer shell. When an organic electrolyte is used inside, even if the liquid is very hot, it will not explode, because the aluminum-plastic film polymer battery adopts solid or colloidal state without leakage, but only Natural rupture. But nothing is absolute. If the instantaneous current is large enough and a short circuit occurs, it is not impossible for the battery to spontaneously ignite or burst. The occurrence of mobile phone and tablet safety accidents is mostly caused by this situation.
4. Cell voltage
Since the polymer battery uses polymer materials, it can be made into a multi-layer combination in the cell to achieve high voltage, while the nominal capacity of the lithium-ion battery cell is 3.6V. In order to achieve high voltage in practical use, more A series of cells can form an ideal high-voltage working platform.