18650 rechargeable battery lithium 3.7v 3500mah
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18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah

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Polymer lithium battery

source:Industry News release time:2024-04-11 Hits:     Popular:AG11 battery

  

  According to the different electrolyte materials used in lithium ion batteries, lithium ion batteries can be divided into liquid lithium ion batteries (LIB) and polymer lithium ion batteries (LIP) two categories. The positive and negative electrode materials used in polymer lithium-ion batteries are the same as liquid lithium ions, and the working principle of the battery is basically the same. Their main difference is the difference in electrolytes, lithium-ion batteries use liquid electrolytes, while polymer lithium-ion batteries are replaced by solid polymer electrolytes, this polymer can be "dry", it can also be "colloidal", most of the current use of polymer colloidal electrolytes. Polymer lithium-ion batteries can be divided into three categories:

  (1) Solid polymer electrolyte lithium-ion battery. The electrolyte is a mixture of polymer and salt, and the ionic conductivity of this battery is low at room temperature, which is suitable for high temperature use.

  (2) Gel polymer electrolyte lithium-ion battery. That is, additives such as plasticizers are added to the solid polymer electrolyte to improve the ionic conductivity, so that the battery can be used at room temperature.

  (3) Lithium ion batteries with polymer cathode materials. Using conductive polymer as a positive electrode material, its specific energy is 3 times that of existing lithium-ion batteries, which is the latest generation of lithium-ion batteries. Due to the use of solid electrolyte instead of liquid electrolyte, compared with liquid lithium ion battery, polymer lithium ion battery has the advantages of thin shape, arbitrary area and arbitrary shape, and does not produce leakage and combustion explosion and other safety problems, so can be made of aluminum-plastic composite film battery shell, which can improve the specific capacity of the entire battery; Polymer lithium-ion batteries can also use polymer as a positive electrode material, and its mass/energy ratio will be more than 50% higher than the current liquid lithium-ion batteries. In addition, polymer lithium-ion batteries have been improved in terms of operating voltage and charge-discharge cycle life than lithium-ion batteries. Based on the above advantages, polymer lithium-ion batteries are known as the next generation of lithium-ion batteries.


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