Lithium-ion Polymer batteries differ from Lithium-ion batteries only in construction, they can be made by same chemistry, so they have almost same performance. However, Lithium Polymer has its own characteristics:
Lithium Polymer battery advantages:
☆ Better safety performance - Lithium-ion polymer batteries with aluminum composite flexible packaging in the structure, differ from liquid metal case of batteries, in the event of a safety hazard, liquid batteries easy explosion, but Lithium polymer battery mostly can be swelled to avoid explosion.
☆ Flexible sizes and diversified shape - Lithium-ion polymer cells can be ultra-thin with 1mm thickness and assemble into a credit card. Also they can be curved, rounded or other special structure.
☆ Customizable - There is no standard Lithium-ion polymer cells like Lithium-ion 18650, 26650, 14500..., but they can be built with any sizes to fit into your application. And the low cost for developing a new model.
There are also other advantages same as Lithium-ion battery:
☆ High energy density
☆ Small and light
☆ Low self-discharge
☆ Non memory effect
☆ Quick charging
☆ High open-circuit voltage
☆ Long service life
☆ Low maintenance
☆ No requirement for priming
Lithium Polymer battery disadvantages:
* Swelling or meteorism - Because of special structure and soft packaging, Lithium Polymer cells has a probabilistic of swelling in about 3‰, the cell should be shielded once swelled.
* Higher cost than Lithium-ion - As there is no full-automatic equipment for mass production, the production cost of Lithium Polymer battery is much higher than Lithium-ion cells.
Other disadvantages are same as Lithium-ion battery:
* Protection required
* Aging effect
* Transportation problems
* Deep discharge
* Safety concerns
* Sensitivity to high temperature