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The most important difference between liquid lithium ion batteries and polymer lithium ion batteries is

1. Differences in materials: In polymer lithium ion batteries, at least one of the three basic elements mentioned above must use polymer materials, such as replacing electrolyte solutions with polyacrylic acid, polymethacrylic acid, and other bizarre gadgets.

2. Differences in electrolyte morphology: Liquid lithium ion batteries mostly use liquid organic solvents+conductive salts, while polymer lithium ion batteries replace these electrolytes with colloids/solids (specific composition depends on battery model).

What are their respective strengths?

Simple comparison between polymer lithium battery and liquid lithium battery

Polymer lithium battery Liquid lithium battery Energy density (Wh/L)>300200~280 Customizable degree (shape) Flexible, difficult, light weight (no metal protective shell required) Heavy (metal protective shell required) Safety, safety, cost, and low cost

1. Energy density: The higher the energy density, the more capacity can be possessed per unit volume. Polymer lithium batteries have improved the material/thickness of negative electrodes (anodes), diaphragms, and other materials, and their energy density has now reached 600Wh/L+.

Customizability: Polymer lithium batteries are easier to achieve lightweight shapes, and do not need to be wrapped in metal protective shells, making it easier to customize into various shapes.

3. Weight: It has been indicated on the table.

4. Safety: In extreme situations (such as overcharge/high temperature), lithium batteries can undergo intense chemical reactions inside, resulting in a large amount of gas. At this time, liquid lithium batteries are wrapped in metal shells, and when the internal pressure is relatively high, the shell will rupture and explode. However, polymer lithium batteries are only wrapped with packaged aluminum films (or plastic shells), and as long as the internal pressure is slightly high, they will expand or rupture, without causing an explosion. However, it should be noted that both liquid lithium batteries and polymer lithium batteries can burn under extreme circumstances.

5. Cost: In addition to the higher material cost of polymer lithium batteries than liquid lithium batteries, due to the higher customization degree of polymer lithium batteries, there will be more costs in the design and manufacturing process, such as various customized tooling fixtures, testing equipment, etc., resulting in higher cost of polymer lithium batteries than standard/regular shape liquid lithium batteries.

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