difference between li ion and li polymer battery
1 Lithium-ion polymer batteries or LiPoâs chemical composition is different from Li-Ion battery. 2  The electrolyte used in Li-polymer is a nonconducting solid polymer composite (polyacrylonitrile), which allows ion exchange between the two electrodes. 3  The cell thickness of Li-polymer is less (0.039 inches) than Li-ion.
They both have similar capabilities, but the main difference is that Lithium Polymer batteries can be shaped/molded in ways that Lithium Ion batteries simply can't. Lithium Polymer batteries are used in lots of hobby equipment, very small devices, and anywhere else where a certain shape of battery is required.
This article is very, very poor. Lithium-Polymer batteries have 20% or higher energy density than Lithium-Ions. That is why a smaller Li-Poly battery can have the same capacity as a Li-Ion. It is also one of the reasons they are more expensive.