Difference between Polymer Battery and Lithium Battery

The concept of lithium batteries is used very frequently. With a little attention, we will find that there are three differences in the broad, narrower, and narrow sense of the concept. The generalized lithium batteries include lithium primary batteries and lithium ion batteries; Since lithium ion batteries are more widely used than lithium primary batteries, lithium batteries usually refer to lithium ion batteries in a narrower sense; There are two categories inside lithium ion batteries: polymer lithium ion batteries and liquid lithium ion batteries. Because the quality is greater and the use of liquid lithium ion batteries is more, the narrow definition of lithium ion batteries refers to liquid lithium ion batteries. Polymer lithium ion batteries are also called lithium polymer batteries. It is customary to call it a polymer battery for short. If the difference between a lithium polymer battery and a lithium battery is compared in a broad and narrower sense, then the only thing is the relationship between the concept and the concept, and the lithium polymer battery is included in the lithium battery. Therefore, what is of comparative significance is the comparison on the narrow level: that is, the comparison between polymer batteries and liquid lithium-ion batteries. Based on this, the following lithium batteries refer to liquid lithium-ion batteries.

1, the fundamental difference is raw materials, which is the root of the different manifestations of the two. Polymer batteries refer to the use of polymer materials in at least one of the three components: positive, negative, or electrolyte. Polymer means large molecular weight, and its corresponding concept is small molecules. Polymer has high strength, high toughness and high elasticity. At present, the polymer battery polymer materials developed are mainly used for positive poles and electrolytes. 1 In addition to the inorganic compounds of lithium batteries, polymer battery positive electrode materials can also use conductive polymer polymers; The electrolytes of polymer batteries include polymer electrolytes(solid or colloidal) and organic electrolytes. Lithium batteries use electrolytes(liquids or colloids)

2, in the plastic shape, polymer batteries can be thinned, arbitrary area and arbitrary shape, because the electrolyte can be solid but not liquid, lithium batteries use electrolytes, need a strong shell As a secondary packaging to accommodate electrolytes. Therefore, this also increases the weight of lithium batteries.

3, safety aspects: The current polymer is mostly a soft-pack battery, using aluminum plastic film as a shell, when the internal use of organic electrolytes, even if the liquid is very hot, it will not explode, because the aluminum plastic membrane polymer battery is solid or colloidal without leakage. Fluid, but naturally ruptured. But nothing is absolute. If the instantaneous current is large enough and there is a short circuit, it is not impossible for the battery to spontaneously ignite or burst. The safety accidents of mobile phones and tablets are often caused by this situation.

4, core voltage: Since the polymer battery uses a polymer material, it can be made into a multi-layer combination in the core to reach Gaodianya, while the nominal capacity of the lithium battery core is 3.6 V, in order to achieve Gaodianya in practical use. It is necessary to connect multiple cores in series to form an ideal Gaodianya working platform.

If the above features are better than polymer batteries and lithium batteries, then the conclusion is certain. However, in the market is still the application of lithium batteries in the main position, which shows that lithium batteries also have comparative advantages, we continue to compare.

Conductivity: The solid electrolyte ion conductivity of polymer batteries is low. At present, some additives are added to make it a gel electrolyte to improve the conductivity. This only increases the Ionic conductivity, unlike the lithium battery's conductivity to maintain a stable value without being affected by the quality of the auxiliary material.

Capacity: The capacity of polymer batteries has not been effectively increased, and it has been reduced compared to standard lithium batteries.

Manufacturing process: the thinner the polymer battery is, the thicker the lithium battery is, the better the production, which makes the lithium battery can expand the field of application.

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

Polymer batteries are strictly called "lithium-polymer batteries"(Li-polymer, also known as polymer lithium batteries): it is also a type of lithium-ion battery, but it has a high energy density compared to lithium-ion batteries(Li-ion)., smaller, thinner, lighter, As well as a variety of obvious advantages such as high safety, it is a new type of battery. In terms of shape, lithium-polymer batteries have ultra-thinning characteristics and can be made into batteries of any shape and capacity in accordance with the needs of various products. This type of battery can achieve a minimum thickness of up to 0.5 mm. Its nominal voltage, like Li-ion, is also a nominal voltage of 3.7 V and has no memory effect.

"Lithium battery" is a type of battery that uses lithium metal or lithium alloy as a negative electrode material and uses a non-aqueous electrolyte solution. In 1912, the lithium metal battery was first proposed and studied by GilbertN. Lewis. In the 1970s, M.S. Whittingham proposed and began to study lithium ion batteries. Due to the very lively chemical properties of lithium metals, the processing, preservation, and use of lithium metals require very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have now become the mainstream.

The main differences between the two are:

1, polymer batteries do not have battery leakage problems, the battery does not contain liquid electrolyte inside, using colloidal solids. Lithium batteries are liquid.

2, polymer batteries can be made into thin batteries: with a capacity of 3.6 V400mAh, its thickness can be as thin as 0.5 mm. Lithium batteries can't be very thin.

3, polymer batteries can bend deformation: polymer batteries can bend up to about 900. Lithium batteries can not bend or be too large.

4, polymer batteries can be made into a single Gaodianya: the battery of the liquid electrolyte can only be connected in series with several batteries to obtain Gaodianya, polymer batteries.

5, because the polymer battery itself does not have a liquid, it can be made into a multi-layer combination in a single piece to reach Gaodianya.

6, polymer battery capacity will be twice the same size lithium-ion battery Gaochu.

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