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The Difference Between Lithium Polymer Batteries and Lithium Ion Batteries
2022-03-10
Lithium-ion batteries are the current battery system with better overall performance. The negative electrode of lithium-ion battery is a carbon material, such as graphite. The positive electrode is a transition metal oxide containing lithium, such as LiMn2O4. Lithium polymer batteries have a larger capacity than lithium ion batteries in the same volume, and there is no memory effect at all (lithium ion batteries still have a memory effect, but it is smaller).
1. Lithium-ion batteries
*high operating voltage, lithium-ion battery operating voltage at 3.6V, is three times the working voltage of NiCd and NiMH batteries.
*high specific energy. The specific energy of lithium-ion battery has reached 140Wh/kg, which is 3 times of NiCd battery and 1.5 times of NiMH battery.
*Long cycle life. At present, the cycle life of lithium-ion batteries has reached more than 1000 times, in the low depth of discharge up to tens of thousands of times, more than several other secondary batteries.
*Small self-discharge. Lithium-ion battery monthly self-discharge rate is only 6-8%, much lower than nickel-cadmium batteries (25-30%) and nickel-hydrogen batteries (30-40%).
*No memory effect. Can be charged at any time according to the requirements, without reducing the performance of the battery.
*No pollution to the environment. Lithium-ion batteries do not exist in harmful substances, is a veritable "green battery".
2. Lithium polymer batteries
Lithium polymer batteries are a newer generation of batteries, which entered the market in large quantities in 1999. Lithium polymer batteries are basically the same as lithium-ion batteries, except for the electrolyte is a solid polymer, rather than a liquid electrolyte. The polymer electrolyte material is a general film consisting of a solute in which the subject polymer, such as an oxide of polyethylene, acts as an immobile solvent. The advantage of lithium polymer batteries is that they can be made in any shape and are relatively light because they do not contain heavy metals and have a plastic shell that keeps the electrolyte from leaking. They all perform better, ideally with a capacity of several thousand mA/h, and are safer. The solid electrolyte is like a sealed gel and does not disintegrate easily and naturally during the charging process.
3. The comparison of the two types of batteries
Lithium polymer batteries and lithium ion battery technology can replace the Ni-Gd battery. But the price is too high, the market has not been fully accepted, especially lithium polymer technology. Polymer batteries will not always be more expensive than lithium-ion batteries, the current processing is really much more expensive, which pushes the development of lithium-ion battery technology. Lithium polymer batteries are actually a gel-like substance that is easy to make into various shapes. And does not contain harmful heavy metal elements, is the "green battery".
1. Lithium-ion batteries
*high operating voltage, lithium-ion battery operating voltage at 3.6V, is three times the working voltage of NiCd and NiMH batteries.
*high specific energy. The specific energy of lithium-ion battery has reached 140Wh/kg, which is 3 times of NiCd battery and 1.5 times of NiMH battery.
*Long cycle life. At present, the cycle life of lithium-ion batteries has reached more than 1000 times, in the low depth of discharge up to tens of thousands of times, more than several other secondary batteries.
*Small self-discharge. Lithium-ion battery monthly self-discharge rate is only 6-8%, much lower than nickel-cadmium batteries (25-30%) and nickel-hydrogen batteries (30-40%).
*No memory effect. Can be charged at any time according to the requirements, without reducing the performance of the battery.
*No pollution to the environment. Lithium-ion batteries do not exist in harmful substances, is a veritable "green battery".
2. Lithium polymer batteries
Lithium polymer batteries are a newer generation of batteries, which entered the market in large quantities in 1999. Lithium polymer batteries are basically the same as lithium-ion batteries, except for the electrolyte is a solid polymer, rather than a liquid electrolyte. The polymer electrolyte material is a general film consisting of a solute in which the subject polymer, such as an oxide of polyethylene, acts as an immobile solvent. The advantage of lithium polymer batteries is that they can be made in any shape and are relatively light because they do not contain heavy metals and have a plastic shell that keeps the electrolyte from leaking. They all perform better, ideally with a capacity of several thousand mA/h, and are safer. The solid electrolyte is like a sealed gel and does not disintegrate easily and naturally during the charging process.
3. The comparison of the two types of batteries
Lithium polymer batteries and lithium ion battery technology can replace the Ni-Gd battery. But the price is too high, the market has not been fully accepted, especially lithium polymer technology. Polymer batteries will not always be more expensive than lithium-ion batteries, the current processing is really much more expensive, which pushes the development of lithium-ion battery technology. Lithium polymer batteries are actually a gel-like substance that is easy to make into various shapes. And does not contain harmful heavy metal elements, is the "green battery".
