Definition of Polymeric Lithium Battery compared to other types

Aug 14, 2019   Pageview:26

Polymer Lithium Battery Profile


According to the different electrolyte materials used in lithium-ion batteries, lithium-ion batteries are divided into liquid lithium-ion batteries and polymer lithium-ion batteries or plastic lithium-ion batteries. The positive and negative materials used in polymer lithium-ion batteries are the same as liquid lithium-ions. Positive materials are divided into lithium cobalt acid, lithium manganese acid, ternary materials, and lithium iron phosphate materials. Negative graphite, and the principle of battery operation is basically the same. Their main difference lies in the difference in electrolytes. Liquid lithium-ion batteries use liquid electrolytes. Polymer lithium-ion batteries are replaced by solid polymer electrolytes. This polymer can be "dry" or "colloidal"., At present, most polymer gel electrolytes are used.


Polymer lithium battery detailed solution and principle _ polymer battery and what is the difference between lithium battery? Which is better?


classification


Solid polymer electrolyte lithium ion battery electrolyte is a mixture of polymer and salt. This battery has high Ionic conductivity at room temperature and can be used at room temperature.


Gel gel polymer electrolyte lithium-ion batteries add plasticizers and other additives to solid polymer electrolytes to increase Ionic conductivity and enable batteries to be used at room temperature.


Polymers use solid electrolytes instead of liquid electrolytes. Compared with liquid lithium-ion batteries, polymer lithium-ion batteries have the advantages of thinning, arbitrary area, and arbitrary shape. Therefore, aluminum plastic composite films can be used to make battery shells., This can improve the specific capacity of the entire battery; Polymer lithium-ion batteries can also use polymer as a positive material, and their quality will be more than 20 % higher than that of current liquid lithium-ion batteries. Polymer lithium-ion battery batteries are miniaturized, thin, and lightweight. Therefore, polymer batteries will gradually increase in market possession.


Polymer lithium battery detailed solution and principle _ polymer battery and what is the difference between lithium battery? Which is better?


characteristic


Polymer lithium-ion batteries have the following characteristics:


1 Shaping flexibility; 2 Higher mass ratio energy(3 times more than MH-Ni battery); 3 Electrochemical stable window width, up to 5V; 4 Perfect safety and reliability; 5 Longer cycle life, less capacity loss; High volume utilization rate;


Polymer lithium battery principle


Ion batteries currently have liquid lithium ion batteries(LIB) and polymer lithium ion batteries(PLB). Among them, liquid lithium-ion batteries refer to secondary batteries where Li + embedded compounds are positive and negative. The positive electrode uses the lithium compound LiCoO2, LiNiO2 or LiMn2O4, and the negative electrode uses the lithium-carbon interlayer compound LixC6. The typical battery system is:


(-) C | LiPF6-EC+DEC | LiCoO2(+)


Positive reaction(reduction reaction): Li1-xCoO2 + xLi + XE-= LiCoO2 --(2.1)


Negative reaction(oxidation reaction): LixC 6-xe-= 6C + xLi +-(2.2)


Total battery reaction: Li1-xCoO2 + LixC 6 = LiCoO2 +6C-(2.3)


Polymer lithium-ion batteries have the same principle as liquid lithium, the main difference being that electrolytes are different from liquid lithium. The main structure of the battery includes three elements: positive, negative, and electrolyte. The so-called polymer lithium-ion battery means that at least one or more of these three major structures use polymer materials as the main battery system. In the polymer lithium-ion battery system currently developed, polymer materials are mainly applied to positive poles and electrolytes. Positive materials include conductive polymer polymers or inorganic compounds used in general lithium-ion batteries. Electrolytes can use solid or colloidal polymer electrolytes, or organic electrolytes. Lithium-ion technologies generally use liquids or colloidal electrolytes. Therefore, strong secondary packaging is required to accommodate flammable active ingredients, which increases weight and also limits size flexibility.


Polymer lithium battery detailed solution and principle _ polymer battery and what is the difference between lithium battery? Which is better?


The new generation of polymer lithium-ion batteries can be thinned in shape(ATL batteries can be up to 0.5 mm thin, corresponding to the thickness of a card), arbitrary area, and arbitrary shape, greatly improving the battery design. Flexibility can meet product demand, Making batteries of any shape and capacity provides device developers with some design flexibility and adaptability in power solutions to maximize their product performance. At the same time, the unit energy of polymer lithium-ion batteries has increased by 20 % compared to the current general lithium-ion batteries, and its capacity, environmental protection and other aspects are better than lithium-ion batteries, with some improvements.


What's the difference between a polymer battery and a lithium battery? Which is better?


Polymer batteries are better, lithium batteries are now almost obsolete, and lithium batteries use metallic lithium as a negative electrode. The earliest is the lithium-manganese dioxide battery. The reaction is the Redox reaction Li + MnO2 = LiMnO2. The lithium metal battery voltage is about 3.0 to 3.6, depending on the cathode material. Lithium metal batteries are still mainly used in button batteries. Others have been replaced by lithium polymer batteries or lithium ion batteries. Lithium is a more active metal than sodium, and it is easy to lose batteries, that is, it is prone to oxidation reactions. It goes without saying that even hydrogen in water can be replaced. Lithium batteries almost react to air. In the past, it was often seen that lithium batteries were used in the wild to take fire, that is, the batteries were smashed, and the lithium and air inside were reacted with huge heat. You can see how dangerous lithium batteries are.


Polymer lithium battery detailed solution and principle _ polymer battery and what is the difference between lithium battery? Which is better?


Lithium-ion batteries are different from lithium batteries in that they do not contain metallic lithium. Lithium-ion batteries are rechargeable batteries that rely mainly on lithium ions to move between positive and negative poles. During the charging and discharging process, Li + is embedded and deembedded between the two electrodes: When recharging the battery, Li + is deembedded from the positive electrode, the negative electrode is embedded through the electrolyte, and the negative electrode is in a lithium-rich state; When discharging, it is the opposite. Polymer batteries are actually a type of lithium-ion battery that works the same way as lithium-ion batteries. Unlike lithium-ion batteries, the electrolyte inside is replaced by an electrolyte, so it is safer and the volume can be smaller.


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