Which is better, polymer batteries or lithium batteries? What is the difference between them?

 新闻资讯     |      2019-07-25

The concept of lithium batteries is used very frequently. If we pay attention to it, we will find that there are three differences in the concept of lithium batteries: broad sense, narrow sense and narrow sense. Generally speaking, lithium-ion batteries include lithium-ion batteries and lithium-ion batteries; because lithium-ion batteries are more widely used than lithium-ion batteries, lithium-ion batteries are usually referred to as lithium-ion batteries in a narrower sense; there are two kinds of classifications in lithium-ion batteries: polymer lithium-ion batteries and liquid lithium-ion batteries, because of their larger mass and more applications, lithium Lithium ion batteries are liquid lithium ion batteries, and polymer lithium ion batteries are also called lithium polymer batteries, which are customarily referred to as polymer batteries. If the difference between lithium polymer batteries and lithium batteries is compared in a broad sense and a narrower sense, the only difference is the relationship between concept and generic concept. Lithium polymer batteries are included in lithium batteries. Therefore, there is a comparative significance in the narrow sense: the comparison of polymer batteries and liquid lithium-ion batteries. Based on this, the following lithium-ion batteries are used to refer to liquid lithium-ion batteries.

1. The fundamental difference is raw materials.

This is the root cause of their different performances. Polymer batteries refer to the use of polymer materials in at least one of the three major components of positive, negative or electrolyte. Polymer means large molecular weight. The corresponding concept is small molecule. Polymer has high strength, high toughness and high elasticity. Polymer materials currently used in polymer batteries are mainly used for positive electrodes and electrolytes. The cathode materials of polymer batteries can use conductive polymer as well as inorganic compounds of lithium batteries. The electrolytes of polymer batteries include polymer electrolytes (solid or colloidal) and organic electrolytes. Lithium batteries use electrolytes (liquid or colloidal).

2. Shaping Difference

Polymer batteries can be thin, arbitrary area and arbitrary shape, because their electrolytes can be solid colloidal rather than liquid. Lithium batteries use electrolyte and need a solid shell as a secondary packaging to contain electrolyte. As a result, lithium-ion batteries have gained some weight.

3. Safety

Current polymer batteries are mostly soft-packed batteries. Aluminum-plastic film is used as the shell. When organic electrolyte is used inside, the liquid will not explode even if the liquid is very hot. Aluminum-plastic film polymer batteries use solid or colloidal state without leakage, but only rupture naturally. But anything is not absolute. If the instantaneous current is large enough to cause a short circuit, then the battery spontaneous combustion or burst is not impossible. The occurrence of safety accidents on mobile phones and tablet computers is caused by this situation.

4. Core Voltage

Because polymer batteries use polymer materials, they can be made into multi-layer combination in the core to achieve high voltage, while the nominal capacity of lithium batteries is 3.6V. In order to achieve high voltage in practical application, it is necessary to connect multiple cores in series to form an ideal high voltage working platform.

If we compare polymer batteries with lithium batteries according to the above characteristics, the conclusion is certain. However, the application of lithium batteries is still dominant in the market, which shows that lithium batteries also have comparative advantages, and we continue to compare.

5. Conductivity

Polymer batteries have low ionic conductivity of solid electrolyte. At present, some additives have been added to make them gel electrolyte to improve the ionic conductivity. This only increases the ionic conductivity, unlike lithium batteries, which maintains a stable conductivity without being affected by the quality of auxiliary materials.

6, capacity

The capacity of polymer batteries has not been effectively improved, and compared with lithium batteries of standard capacity, it has been reduced.

7. Manufacturing Technology

The thinner the polymer battery, the better the production. The thicker the lithium battery, the better the production. This makes the application of lithium battery more expandable.

8, price

At present, the price of polymer batteries is generally higher than that of lithium batteries, which affects the market capacity of the two batteries. The ratio of the former to the latter is 1:9.

It is hard to say absolutely that which is better for polymer batteries and lithium batteries. They have their own advantages. If we have to draw a conclusion, polymer batteries will have more applications in small applications, and lithium batteries will be more promising in large applications. If polymer batteries can break through the limitations of price and design, they may represent the trend of battery development, because their environmental protection and safety are more in line with the trend.
The concept of lithium batteries is used very frequently. If we pay attention to it, we will find that there are three differences in the concept of lithium batteries: broad sense, narrow sense and narrow sense. Generally speaking, lithium-ion batteries include lithium-ion batteries and lithium-ion batteries; because lithium-ion batteries are more widely used than lithium-ion batteries, lithium-ion batteries are usually referred to as lithium-ion batteries in a narrower sense; there are two kinds of classifications in lithium-ion batteries: polymer lithium-ion batteries and liquid lithium-ion batteries, because of their larger mass and more applications, lithium Lithium ion batteries are liquid lithium ion batteries, and polymer lithium ion batteries are also called lithium polymer batteries, which are customarily referred to as polymer batteries. If the difference between lithium polymer batteries and lithium batteries is compared in a broad sense and a narrower sense, the only difference is the relationship between concept and generic concept. Lithium polymer batteries are included in lithium batteries. Therefore, there is a comparative significance in the narrow sense: the comparison of polymer batteries and liquid lithium-ion batteries. Based on this, the following lithium-ion batteries are used to refer to liquid lithium-ion batteries.

1. The fundamental difference is raw materials.

This is the root cause of their different performances. Polymer batteries refer to the use of polymer materials in at least one of the three major components of positive, negative or electrolyte. Polymer means large molecular weight. The corresponding concept is small molecule. Polymer has high strength, high toughness and high elasticity. Polymer materials currently used in polymer batteries are mainly used for positive electrodes and electrolytes. The cathode materials of polymer batteries can use conductive polymer as well as inorganic compounds of lithium batteries. The electrolytes of polymer batteries include polymer electrolytes (solid or colloidal) and organic electrolytes. Lithium batteries use electrolytes (liquid or colloidal).

2. Shaping Difference

Polymer batteries can be thin, arbitrary area and arbitrary shape, because their electrolytes can be solid colloidal rather than liquid. Lithium batteries use electrolyte and need a solid shell as a secondary packaging to contain electrolyte. As a result, lithium-ion batteries have gained some weight.

3. Safety

Current polymer batteries are mostly soft-packed batteries. Aluminum-plastic film is used as the shell. When organic electrolyte is used inside, the liquid will not explode even if the liquid is very hot. Aluminum-plastic film polymer batteries use solid or colloidal state without leakage, but only rupture naturally. But anything is not absolute. If the instantaneous current is large enough to cause a short circuit, then the battery spontaneous combustion or burst is not impossible. The occurrence of safety accidents on mobile phones and tablet computers is caused by this situation.

4. Core Voltage

Because polymer batteries use polymer materials, they can be made into multi-layer combination in the core to achieve high voltage, while the nominal capacity of lithium batteries is 3.6V. In order to achieve high voltage in practical application, it is necessary to connect multiple cores in series to form an ideal high voltage working platform.

If we compare polymer batteries with lithium batteries according to the above characteristics, the conclusion is certain. However, the application of lithium batteries is still dominant in the market, which shows that lithium batteries also have comparative advantages, and we continue to compare.

5. Conductivity

Polymer batteries have low ionic conductivity of solid electrolyte. At present, some additives have been added to make them gel electrolyte to improve the ionic conductivity. This only increases the ionic conductivity, unlike lithium batteries, which maintains a stable conductivity without being affected by the quality of auxiliary materials.

6, capacity

The capacity of polymer batteries has not been effectively improved, and compared with lithium batteries of standard capacity, it has been reduced.

7. Manufacturing Technology

The thinner the polymer battery, the better the production. The thicker the lithium battery, the better the production. This makes the application of lithium battery more expandable.

8, price

At present, the price of polymer batteries is generally higher than that of lithium batteries, which affects the market capacity of the two batteries. The ratio of the former to the latter is 1:9.

It is hard to say absolutely that which is better for polymer batteries and lithium batteries. They have their own advantages. If we have to draw a conclusion, polymer batteries will have more applications in small applications, and lithium batteries will be more promising in large applications. If polymer batteries can break through the limitations of price and design, they may represent the trend of battery development, because their environmental protection and safety are more in line with the trend.